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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <sstream>
#include <string>
#include <vector>
#include "gmock/gmock.h"
#include "src/reader/spirv/function.h"
#include "src/reader/spirv/parser_impl.h"
#include "src/reader/spirv/parser_impl_test_helper.h"
#include "src/reader/spirv/spirv_tools_helpers_test.h"
namespace tint {
namespace reader {
namespace spirv {
namespace {
using ::testing::Eq;
using ::testing::HasSubstr;
std::string Dump(const std::vector<uint32_t>& v) {
std::ostringstream o;
o << "{";
for (auto a : v) {
o << a << " ";
}
o << "}";
return o.str();
}
using ::testing::ElementsAre;
using ::testing::Eq;
using ::testing::UnorderedElementsAre;
std::string CommonTypes() {
return R"(
OpCapability Shader
OpMemoryModel Logical Simple
OpName %var "var"
%void = OpTypeVoid
%voidfn = OpTypeFunction %void
%bool = OpTypeBool
%cond = OpConstantNull %bool
%cond2 = OpConstantTrue %bool
%cond3 = OpConstantFalse %bool
%uint = OpTypeInt 32 0
%int = OpTypeInt 32 1
%selector = OpConstant %uint 42
%signed_selector = OpConstant %int 42
%uintfn = OpTypeFunction %uint
%uint_0 = OpConstant %uint 0
%uint_1 = OpConstant %uint 1
%uint_2 = OpConstant %uint 2
%uint_3 = OpConstant %uint 3
%uint_4 = OpConstant %uint 4
%uint_5 = OpConstant %uint 5
%uint_6 = OpConstant %uint 6
%uint_7 = OpConstant %uint 7
%uint_8 = OpConstant %uint 8
%uint_20 = OpConstant %uint 20
%uint_30 = OpConstant %uint 30
%uint_40 = OpConstant %uint 40
%uint_50 = OpConstant %uint 50
%ptr_Private_uint = OpTypePointer Private %uint
%var = OpVariable %ptr_Private_uint Private
%999 = OpConstant %uint 999
)";
}
/// Runs the necessary flow until and including finding switch case
/// headers.
/// @returns the result of finding switch case headers.
bool FlowFindSwitchCaseHeaders(FunctionEmitter* fe) {
fe->RegisterBasicBlocks();
EXPECT_TRUE(fe->RegisterMerges()) << fe->parser()->error();
fe->ComputeBlockOrderAndPositions();
EXPECT_TRUE(fe->VerifyHeaderContinueMergeOrder()) << fe->parser()->error();
EXPECT_TRUE(fe->LabelControlFlowConstructs()) << fe->parser()->error();
return fe->FindSwitchCaseHeaders();
}
/// Runs the necessary flow until and including classify CFG edges,
/// @returns the result of classify CFG edges.
bool FlowClassifyCFGEdges(FunctionEmitter* fe) {
EXPECT_TRUE(FlowFindSwitchCaseHeaders(fe)) << fe->parser()->error();
return fe->ClassifyCFGEdges();
}
/// Runs the necessary flow until and including finding if-selection
/// internal headers.
/// @returns the result of classify CFG edges.
bool FlowFindIfSelectionInternalHeaders(FunctionEmitter* fe) {
EXPECT_TRUE(FlowClassifyCFGEdges(fe)) << fe->parser()->error();
return fe->FindIfSelectionInternalHeaders();
}
TEST_F(SpvParserTest, TerminatorsAreSane_SingleBlock) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%42 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.TerminatorsAreSane());
}
TEST_F(SpvParserTest, TerminatorsAreSane_Sequence) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%20 = OpLabel
OpBranch %30
%30 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.TerminatorsAreSane()) << p->error();
}
TEST_F(SpvParserTest, TerminatorsAreSane_If) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%20 = OpLabel
OpSelectionMerge %99 None
OpBranchConditional %cond %30 %40
%30 = OpLabel
OpBranch %99
%40 = OpLabel
OpBranch %99
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.TerminatorsAreSane()) << p->error();
}
TEST_F(SpvParserTest, TerminatorsAreSane_Switch) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %80 20 %20 30 %30
%20 = OpLabel
OpBranch %30 ; fall through
%30 = OpLabel
OpBranch %99
%80 = OpLabel
OpBranch %99
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.TerminatorsAreSane());
}
TEST_F(SpvParserTest, TerminatorsAreSane_Loop_SingleBlock) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %20 None
OpBranchConditional %cond %20 %99
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.TerminatorsAreSane());
}
TEST_F(SpvParserTest, TerminatorsAreSane_Loop_Simple) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %40 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranch %40
%40 = OpLabel
OpBranch %20 ; back edge
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.TerminatorsAreSane());
}
TEST_F(SpvParserTest, TerminatorsAreSane_Kill) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpKill
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.TerminatorsAreSane());
}
TEST_F(SpvParserTest, TerminatorsAreSane_Unreachable) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpUnreachable
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.TerminatorsAreSane());
}
TEST_F(SpvParserTest, TerminatorsAreSane_MissingTerminator) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpFunctionEnd
)"));
// The SPIRV-Tools internal representation rejects this case earlier.
EXPECT_FALSE(p->BuildAndParseInternalModuleExceptFunctions());
}
TEST_F(SpvParserTest, TerminatorsAreSane_DisallowLoopToEntryBlock) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpBranch %10 ; not allowed
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.TerminatorsAreSane());
EXPECT_THAT(p->error(), Eq("Block 20 branches to function entry block 10"));
}
TEST_F(SpvParserTest, TerminatorsAreSane_DisallowNonBlock) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %999 ; definitely wrong
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.TerminatorsAreSane());
EXPECT_THAT(p->error(),
Eq("Block 10 in function 100 branches to 999 which is "
"not a block in the function"));
}
TEST_F(SpvParserTest, TerminatorsAreSane_DisallowBlockInDifferentFunction) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %210
OpFunctionEnd
%200 = OpFunction %void None %voidfn
%210 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.TerminatorsAreSane());
EXPECT_THAT(p->error(), Eq("Block 10 in function 100 branches to 210 which "
"is not a block in the function"));
}
TEST_F(SpvParserTest, RegisterMerges_NoMerges) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.RegisterMerges());
const auto* bi = fe.GetBlockInfo(10);
ASSERT_NE(bi, nullptr);
EXPECT_EQ(bi->merge_for_header, 0u);
EXPECT_EQ(bi->continue_for_header, 0u);
EXPECT_EQ(bi->header_for_merge, 0u);
EXPECT_EQ(bi->header_for_continue, 0u);
EXPECT_FALSE(bi->is_single_block_loop);
}
TEST_F(SpvParserTest, RegisterMerges_GoodSelectionMerge_BranchConditional) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpBranchConditional %cond %20 %99
%20 = OpLabel
OpBranch %99
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.RegisterMerges());
// Header points to the merge
const auto* bi10 = fe.GetBlockInfo(10);
ASSERT_NE(bi10, nullptr);
EXPECT_EQ(bi10->merge_for_header, 99u);
EXPECT_EQ(bi10->continue_for_header, 0u);
EXPECT_EQ(bi10->header_for_merge, 0u);
EXPECT_EQ(bi10->header_for_continue, 0u);
EXPECT_FALSE(bi10->is_single_block_loop);
// Middle block is neither header nor merge
const auto* bi20 = fe.GetBlockInfo(20);
ASSERT_NE(bi20, nullptr);
EXPECT_EQ(bi20->merge_for_header, 0u);
EXPECT_EQ(bi20->continue_for_header, 0u);
EXPECT_EQ(bi20->header_for_merge, 0u);
EXPECT_EQ(bi20->header_for_continue, 0u);
EXPECT_FALSE(bi20->is_single_block_loop);
// Merge block points to the header
const auto* bi99 = fe.GetBlockInfo(99);
ASSERT_NE(bi99, nullptr);
EXPECT_EQ(bi99->merge_for_header, 0u);
EXPECT_EQ(bi99->continue_for_header, 0u);
EXPECT_EQ(bi99->header_for_merge, 10u);
EXPECT_EQ(bi99->header_for_continue, 0u);
EXPECT_FALSE(bi99->is_single_block_loop);
}
TEST_F(SpvParserTest, RegisterMerges_GoodSelectionMerge_Switch) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %99 20 %20
%20 = OpLabel
OpBranch %99
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.RegisterMerges());
// Header points to the merge
const auto* bi10 = fe.GetBlockInfo(10);
ASSERT_NE(bi10, nullptr);
EXPECT_EQ(bi10->merge_for_header, 99u);
EXPECT_EQ(bi10->continue_for_header, 0u);
EXPECT_EQ(bi10->header_for_merge, 0u);
EXPECT_EQ(bi10->header_for_continue, 0u);
EXPECT_FALSE(bi10->is_single_block_loop);
// Middle block is neither header nor merge
const auto* bi20 = fe.GetBlockInfo(20);
ASSERT_NE(bi20, nullptr);
EXPECT_EQ(bi20->merge_for_header, 0u);
EXPECT_EQ(bi20->continue_for_header, 0u);
EXPECT_EQ(bi20->header_for_merge, 0u);
EXPECT_EQ(bi20->header_for_continue, 0u);
EXPECT_FALSE(bi20->is_single_block_loop);
// Merge block points to the header
const auto* bi99 = fe.GetBlockInfo(99);
ASSERT_NE(bi99, nullptr);
EXPECT_EQ(bi99->merge_for_header, 0u);
EXPECT_EQ(bi99->continue_for_header, 0u);
EXPECT_EQ(bi99->header_for_merge, 10u);
EXPECT_EQ(bi99->header_for_continue, 0u);
EXPECT_FALSE(bi99->is_single_block_loop);
}
TEST_F(SpvParserTest, RegisterMerges_GoodLoopMerge_SingleBlockLoop) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %20 None
OpBranchConditional %cond %20 %99
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.RegisterMerges());
// Entry block is not special
const auto* bi10 = fe.GetBlockInfo(10);
ASSERT_NE(bi10, nullptr);
EXPECT_EQ(bi10->merge_for_header, 0u);
EXPECT_EQ(bi10->continue_for_header, 0u);
EXPECT_EQ(bi10->header_for_merge, 0u);
EXPECT_EQ(bi10->header_for_continue, 0u);
EXPECT_FALSE(bi10->is_single_block_loop);
// Single block loop is its own continue, and marked as single block loop.
const auto* bi20 = fe.GetBlockInfo(20);
ASSERT_NE(bi20, nullptr);
EXPECT_EQ(bi20->merge_for_header, 99u);
EXPECT_EQ(bi20->continue_for_header, 20u);
EXPECT_EQ(bi20->header_for_merge, 0u);
EXPECT_EQ(bi20->header_for_continue, 20u);
EXPECT_TRUE(bi20->is_single_block_loop);
// Merge block points to the header
const auto* bi99 = fe.GetBlockInfo(99);
ASSERT_NE(bi99, nullptr);
EXPECT_EQ(bi99->merge_for_header, 0u);
EXPECT_EQ(bi99->continue_for_header, 0u);
EXPECT_EQ(bi99->header_for_merge, 20u);
EXPECT_EQ(bi99->header_for_continue, 0u);
EXPECT_FALSE(bi99->is_single_block_loop);
}
TEST_F(SpvParserTest, RegisterMerges_GoodLoopMerge_MultiBlockLoop_Branch) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %40 None
OpBranch %30
%30 = OpLabel
OpBranchConditional %cond %40 %99
%40 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.RegisterMerges());
// Loop header points to continue and merge
const auto* bi20 = fe.GetBlockInfo(20);
ASSERT_NE(bi20, nullptr);
EXPECT_EQ(bi20->merge_for_header, 99u);
EXPECT_EQ(bi20->continue_for_header, 40u);
EXPECT_EQ(bi20->header_for_merge, 0u);
EXPECT_EQ(bi20->header_for_continue, 0u);
EXPECT_FALSE(bi20->is_single_block_loop);
// Continue block points to header
const auto* bi40 = fe.GetBlockInfo(40);
ASSERT_NE(bi40, nullptr);
EXPECT_EQ(bi40->merge_for_header, 0u);
EXPECT_EQ(bi40->continue_for_header, 0u);
EXPECT_EQ(bi40->header_for_merge, 0u);
EXPECT_EQ(bi40->header_for_continue, 20u);
EXPECT_FALSE(bi40->is_single_block_loop);
// Merge block points to the header
const auto* bi99 = fe.GetBlockInfo(99);
ASSERT_NE(bi99, nullptr);
EXPECT_EQ(bi99->merge_for_header, 0u);
EXPECT_EQ(bi99->continue_for_header, 0u);
EXPECT_EQ(bi99->header_for_merge, 20u);
EXPECT_EQ(bi99->header_for_continue, 0u);
EXPECT_FALSE(bi99->is_single_block_loop);
}
TEST_F(SpvParserTest,
RegisterMerges_GoodLoopMerge_MultiBlockLoop_BranchConditional) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %40 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranch %40
%40 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_TRUE(fe.RegisterMerges());
// Loop header points to continue and merge
const auto* bi20 = fe.GetBlockInfo(20);
ASSERT_NE(bi20, nullptr);
EXPECT_EQ(bi20->merge_for_header, 99u);
EXPECT_EQ(bi20->continue_for_header, 40u);
EXPECT_EQ(bi20->header_for_merge, 0u);
EXPECT_EQ(bi20->header_for_continue, 0u);
EXPECT_FALSE(bi20->is_single_block_loop);
// Continue block points to header
const auto* bi40 = fe.GetBlockInfo(40);
ASSERT_NE(bi40, nullptr);
EXPECT_EQ(bi40->merge_for_header, 0u);
EXPECT_EQ(bi40->continue_for_header, 0u);
EXPECT_EQ(bi40->header_for_merge, 0u);
EXPECT_EQ(bi40->header_for_continue, 20u);
EXPECT_FALSE(bi40->is_single_block_loop);
// Merge block points to the header
const auto* bi99 = fe.GetBlockInfo(99);
ASSERT_NE(bi99, nullptr);
EXPECT_EQ(bi99->merge_for_header, 0u);
EXPECT_EQ(bi99->continue_for_header, 0u);
EXPECT_EQ(bi99->header_for_merge, 20u);
EXPECT_EQ(bi99->header_for_continue, 0u);
EXPECT_FALSE(bi99->is_single_block_loop);
}
TEST_F(SpvParserTest, RegisterMerges_SelectionMerge_BadTerminator) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpBranch %20
%20 = OpLabel
OpBranch %99
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.RegisterMerges());
EXPECT_THAT(p->error(), Eq("Selection header 10 does not end in an "
"OpBranchConditional or OpSwitch instruction"));
}
TEST_F(SpvParserTest, RegisterMerges_LoopMerge_BadTerminator) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %40 None
OpSwitch %selector %99 30 %30
%30 = OpLabel
OpBranch %99
%40 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.RegisterMerges());
EXPECT_THAT(p->error(), Eq("Loop header 20 does not end in an OpBranch or "
"OpBranchConditional instruction"));
}
TEST_F(SpvParserTest, RegisterMerges_BadMergeBlock) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %void None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranch %99
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.RegisterMerges());
EXPECT_THAT(p->error(),
Eq("Structured header block 10 declares invalid merge block 2"));
}
TEST_F(SpvParserTest, RegisterMerges_HeaderIsItsOwnMerge) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %10 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranch %99
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.RegisterMerges());
EXPECT_THAT(p->error(),
Eq("Structured header block 10 cannot be its own merge block"));
}
TEST_F(SpvParserTest, RegisterMerges_MergeReused) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %49 None
OpBranchConditional %cond %20 %49
%20 = OpLabel
OpBranch %49
%49 = OpLabel
OpBranch %50
%50 = OpLabel
OpSelectionMerge %49 None ; can't reuse merge block
OpBranchConditional %cond %60 %99
%60 = OpLabel
OpBranch %99
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.RegisterMerges());
EXPECT_THAT(
p->error(),
Eq("Block 49 declared as merge block for more than one header: 10, 50"));
}
TEST_F(SpvParserTest, RegisterMerges_EntryBlockIsLoopHeader) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpLoopMerge %99 %30 None
OpBranchConditional %cond %10 %99
%30 = OpLabel
OpBranch %10
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.RegisterMerges());
EXPECT_THAT(p->error(),
Eq("Function entry block 10 cannot be a loop header"));
}
TEST_F(SpvParserTest, RegisterMerges_BadContinueTarget) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %999 None
OpBranchConditional %cond %20 %99
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.RegisterMerges());
EXPECT_THAT(p->error(),
Eq("Structured header 20 declares invalid continue target 999"));
}
TEST_F(SpvParserTest, RegisterMerges_MergeSameAsContinue) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %50 %50 None
OpBranchConditional %cond %20 %99
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.RegisterMerges());
EXPECT_THAT(p->error(),
Eq("Invalid structured header block 20: declares block 50 as "
"both its merge block and continue target"));
}
TEST_F(SpvParserTest, RegisterMerges_ContinueReused) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %49 %40 None
OpBranchConditional %cond %30 %49
%30 = OpLabel
OpBranch %40
%40 = OpLabel
OpBranch %20
%49 = OpLabel
OpBranch %50
%50 = OpLabel
OpLoopMerge %99 %40 None
OpBranchConditional %cond %60 %99
%60 = OpLabel
OpBranch %70
%70 = OpLabel
OpBranch %50
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.RegisterMerges());
EXPECT_THAT(p->error(), Eq("Block 40 declared as continue target for more "
"than one header: 20, 50"));
}
TEST_F(SpvParserTest, RegisterMerges_SingleBlockLoop_NotItsOwnContinue) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %30 None
OpBranchConditional %cond %20 %99
%30 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.RegisterMerges());
EXPECT_THAT(
p->error(),
Eq("Block 20 branches to itself but is not its own continue target"));
}
TEST_F(SpvParserTest, RegisterMerges_NotSingleBlockLoop_IsItsOwnContinue) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %20 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
EXPECT_FALSE(fe.RegisterMerges());
EXPECT_THAT(p->error(), Eq("Loop header block 20 declares itself as its own "
"continue target, but does not branch to itself"));
}
TEST_F(SpvParserTest, ComputeBlockOrder_OneBlock) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%42 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(42));
const auto* bi = fe.GetBlockInfo(42);
ASSERT_NE(bi, nullptr);
EXPECT_EQ(bi->pos, 0u);
}
TEST_F(SpvParserTest, ComputeBlockOrder_IgnoreStaticalyUnreachable) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%15 = OpLabel ; statically dead
OpReturn
%20 = OpLabel
OpReturn
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20));
}
TEST_F(SpvParserTest, ComputeBlockOrder_KillIsDeadEnd) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%15 = OpLabel ; statically dead
OpReturn
%20 = OpLabel
OpKill ; Kill doesn't lead anywhere
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20));
}
TEST_F(SpvParserTest, ComputeBlockOrder_UnreachableIsDeadEnd) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%15 = OpLabel ; statically dead
OpReturn
%20 = OpLabel
OpUnreachable ; Unreachable doesn't lead anywhere
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20));
}
TEST_F(SpvParserTest, ComputeBlockOrder_ReorderSequence) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%30 = OpLabel
OpReturn
%20 = OpLabel
OpBranch %30 ; backtrack
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30));
const auto* bi10 = fe.GetBlockInfo(10);
ASSERT_NE(bi10, nullptr);
EXPECT_EQ(bi10->pos, 0u);
const auto* bi20 = fe.GetBlockInfo(20);
ASSERT_NE(bi20, nullptr);
EXPECT_EQ(bi20->pos, 1u);
const auto* bi30 = fe.GetBlockInfo(30);
ASSERT_NE(bi30, nullptr);
EXPECT_EQ(bi30->pos, 2u);
}
TEST_F(SpvParserTest, ComputeBlockOrder_DupConditionalBranch) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpBranchConditional %cond %20 %20
%99 = OpLabel
OpReturn
%20 = OpLabel
OpBranch %99
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_RespectConditionalBranchOrder) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpBranchConditional %cond %20 %30
%99 = OpLabel
OpReturn
%30 = OpLabel
OpReturn
%20 = OpLabel
OpBranch %99
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_TrueOnlyBranch) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpBranchConditional %cond %20 %99
%99 = OpLabel
OpReturn
%20 = OpLabel
OpBranch %99
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_FalseOnlyBranch) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpBranchConditional %cond %99 %20
%99 = OpLabel
OpReturn
%20 = OpLabel
OpBranch %99
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_SwitchOrderNaturallyReversed) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %99 20 %20 30 %30
%99 = OpLabel
OpReturn
%30 = OpLabel
OpReturn
%20 = OpLabel
OpBranch %99
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 30, 20, 99));
}
TEST_F(SpvParserTest,
ComputeBlockOrder_SwitchWithDefaultOrderNaturallyReversed) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %80 20 %20 30 %30
%80 = OpLabel ; the default case
OpBranch %99
%99 = OpLabel
OpReturn
%30 = OpLabel
OpReturn
%20 = OpLabel
OpBranch %99
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 30, 20, 80, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Switch_DefaultSameAsACase) {
auto* p = parser(test::Assemble(CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %30 20 %20 30 %30 40 %40
%99 = OpLabel
OpReturn
%30 = OpLabel
OpBranch %99
%20 = OpLabel
OpBranch %99
%40 = OpLabel
OpBranch %99
OpFunctionEnd
)"));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 40, 20, 30, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_RespectSwitchCaseFallthrough) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %99 20 %20 30 %30 40 %40 50 %50
%50 = OpLabel
OpBranch %99
%99 = OpLabel
OpReturn
%40 = OpLabel
OpBranch %99
%30 = OpLabel
OpBranch %50 ; fallthrough
%20 = OpLabel
OpBranch %40 ; fallthrough
OpFunctionEnd
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 30, 50, 20, 40, 99))
<< assembly;
}
TEST_F(SpvParserTest,
ComputeBlockOrder_RespectSwitchCaseFallthrough_FromDefault) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %80 20 %20 30 %30 40 %40
%80 = OpLabel ; the default case
OpBranch %30 ; fallthrough to another case
%99 = OpLabel
OpReturn
%40 = OpLabel
OpBranch %99
%30 = OpLabel
OpBranch %40
%20 = OpLabel
OpBranch %99
OpFunctionEnd
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 80, 30, 40, 99))
<< assembly;
}
TEST_F(SpvParserTest,
ComputeBlockOrder_RespectSwitchCaseFallthrough_FromCaseToDefaultToCase) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %80 20 %20 30 %30
%99 = OpLabel
OpReturn
%20 = OpLabel
OpBranch %80 ; fallthrough to default
%80 = OpLabel ; the default case
OpBranch %30 ; fallthrough to 30
%30 = OpLabel
OpBranch %99
OpFunctionEnd
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 80, 30, 99)) << assembly;
}
TEST_F(SpvParserTest,
ComputeBlockOrder_SwitchCasesFallthrough_OppositeDirections) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %99 20 %20 30 %30 40 %40 50 %50
%99 = OpLabel
OpReturn
%20 = OpLabel
OpBranch %30 ; forward
%40 = OpLabel
OpBranch %99
%30 = OpLabel
OpBranch %99
; SPIR-V doesn't actually allow a fall-through that goes backward in the
; module. But the block ordering algorithm tolerates it.
%50 = OpLabel
OpBranch %40 ; backward
OpFunctionEnd
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 50, 40, 20, 30, 99))
<< assembly;
}
TEST_F(SpvParserTest,
ComputeBlockOrder_RespectSwitchCaseFallthrough_Interleaved) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %99 20 %20 30 %30 40 %40 50 %50
%99 = OpLabel
OpReturn
%20 = OpLabel
OpBranch %40
%30 = OpLabel
OpBranch %50
%40 = OpLabel
OpBranch %60
%50 = OpLabel
OpBranch %70
%60 = OpLabel
OpBranch %99
%70 = OpLabel
OpBranch %99
OpFunctionEnd
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 30, 50, 70, 20, 40, 60, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Nest_If_Contains_If) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpBranchConditional %cond %20 %50
%99 = OpLabel
OpReturn
%20 = OpLabel
OpSelectionMerge %49 None
OpBranchConditional %cond %30 %40
%49 = OpLabel
OpBranch %99
%30 = OpLabel
OpBranch %49
%40 = OpLabel
OpBranch %49
%50 = OpLabel
OpSelectionMerge %79 None
OpBranchConditional %cond %60 %70
%79 = OpLabel
OpBranch %99
%60 = OpLabel
OpBranch %79
%70 = OpLabel
OpBranch %79
OpFunctionEnd
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(),
ElementsAre(10, 20, 30, 40, 49, 50, 60, 70, 79, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Nest_If_In_SwitchCase) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %50 20 %20 50 %50
%99 = OpLabel
OpReturn
%20 = OpLabel
OpSelectionMerge %49 None
OpBranchConditional %cond %30 %40
%49 = OpLabel
OpBranch %99
%30 = OpLabel
OpBranch %49
%40 = OpLabel
OpBranch %49
%50 = OpLabel
OpSelectionMerge %79 None
OpBranchConditional %cond %60 %70
%79 = OpLabel
OpBranch %99
%60 = OpLabel
OpBranch %79
%70 = OpLabel
OpBranch %79
OpFunctionEnd
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(),
ElementsAre(10, 20, 30, 40, 49, 50, 60, 70, 79, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Nest_IfFallthrough_In_SwitchCase) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %50 20 %20 50 %50
%99 = OpLabel
OpReturn
%20 = OpLabel
OpSelectionMerge %49 None
OpBranchConditional %cond %30 %40
%49 = OpLabel
OpBranchConditional %cond %99 %50 ; fallthrough
%30 = OpLabel
OpBranch %49
%40 = OpLabel
OpBranch %49
%50 = OpLabel
OpSelectionMerge %79 None
OpBranchConditional %cond %60 %70
%79 = OpLabel
OpBranch %99
%60 = OpLabel
OpBranch %79
%70 = OpLabel
OpBranch %79
OpFunctionEnd
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(),
ElementsAre(10, 20, 30, 40, 49, 50, 60, 70, 79, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Nest_IfBreak_In_SwitchCase) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpSelectionMerge %99 None
OpSwitch %selector %50 20 %20 50 %50
%99 = OpLabel
OpReturn
%20 = OpLabel
OpSelectionMerge %49 None
OpBranchConditional %cond %99 %40 ; break-if
%49 = OpLabel
OpBranch %99
%40 = OpLabel
OpBranch %49
%50 = OpLabel
OpSelectionMerge %79 None
OpBranchConditional %cond %60 %99 ; break-unless
%79 = OpLabel
OpBranch %99
%60 = OpLabel
OpBranch %79
OpFunctionEnd
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 40, 49, 50, 60, 79, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_SingleBlock_Simple) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
; The entry block can't be the target of a branch
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %20 None
OpBranchConditional %cond %20 %99
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 99)) << assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_SingleBlock_Infinite) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
; The entry block can't be the target of a branch
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %20 None
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 99)) << assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_SingleBlock_DupInfinite) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
; The entry block can't be the target of a branch
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %20 None
OpBranchConditional %cond %20 %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 99)) << assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_HeaderHasBreakIf) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99 ; like While
%30 = OpLabel ; trivial body
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 50, 99)) << assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_HeaderHasBreakUnless) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %99 %30 ; has break-unless
%30 = OpLabel ; trivial body
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 50, 99)) << assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_BodyHasBreak) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranch %99 ; break
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 50, 99)) << assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_BodyHasBreakIf) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranchConditional %cond2 %99 %40 ; break-if
%40 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 40, 50, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_BodyHasBreakUnless) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranchConditional %cond2 %40 %99 ; break-unless
%40 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 40, 50, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Body_If) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpSelectionMerge %49 None
OpBranchConditional %cond2 %40 %45 ; nested if
%40 = OpLabel
OpBranch %49
%45 = OpLabel
OpBranch %49
%49 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 40, 45, 49, 50, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Body_If_Break) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpSelectionMerge %49 None
OpBranchConditional %cond2 %40 %49 ; nested if
%40 = OpLabel
OpBranch %99 ; break from nested if
%49 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 40, 49, 50, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_BodyHasContinueIf) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranchConditional %cond2 %50 %40 ; continue-if
%40 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 40, 50, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_BodyHasContinueUnless) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranchConditional %cond2 %40 %50 ; continue-unless
%40 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 40, 50, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Body_If_Continue) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpSelectionMerge %49 None
OpBranchConditional %cond2 %40 %49 ; nested if
%40 = OpLabel
OpBranch %50 ; continue from nested if
%49 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 40, 49, 50, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Body_Switch) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpSelectionMerge %49 None
OpSwitch %selector %49 40 %40 45 %45 ; fully nested switch
%40 = OpLabel
OpBranch %49
%45 = OpLabel
OpBranch %49
%49 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 45, 40, 49, 50, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Body_Switch_CaseBreaks) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpSelectionMerge %49 None
OpSwitch %selector %49 40 %40 45 %45
%40 = OpLabel
; This case breaks out of the loop. This is not possible in C
; because "break" will escape the switch only.
OpBranch %99
%45 = OpLabel
OpBranch %49
%49 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 45, 40, 49, 50, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Body_Switch_CaseContinues) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpSelectionMerge %49 None
OpSwitch %selector %49 40 %40 45 %45
%40 = OpLabel
OpBranch %50 ; continue bypasses switch merge
%45 = OpLabel
OpBranch %49
%49 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 45, 40, 49, 50, 99))
<< assembly;
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_BodyHasSwitchContinueBreak) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpSwitch %selector %99 50 %50 ; default is break, 50 is continue
%40 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 50, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Continue_Sequence) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranch %60
%60 = OpLabel
OpBranch %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 50, 60, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Continue_ContainsIf) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranch %50
%50 = OpLabel
OpSelectionMerge %89 None
OpBranchConditional %cond2 %60 %70
%89 = OpLabel
OpBranch %20 ; backedge
%60 = OpLabel
OpBranch %89
%70 = OpLabel
OpBranch %89
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 50, 60, 70, 89, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Continue_HasBreakIf) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranchConditional %cond2 %99 %20
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 50, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Continue_HasBreakUnless) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranch %50
%50 = OpLabel
OpBranchConditional %cond2 %20 %99
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 50, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Continue_SwitchBreak) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpBranch %50
%50 = OpLabel
OpSwitch %selector %20 99 %99 ; yes, this is obtuse but valid
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(), ElementsAre(10, 20, 30, 50, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Loop) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpLoopMerge %49 %40 None
OpBranchConditional %cond2 %35 %49
%35 = OpLabel
OpBranch %37
%37 = OpLabel
OpBranch %40
%40 = OpLabel ; inner loop's continue
OpBranch %30 ; backedge
%49 = OpLabel ; inner loop's merge
OpBranch %50
%50 = OpLabel ; outer loop's continue
OpBranch %20 ; outer loop's backege
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(),
ElementsAre(10, 20, 30, 35, 37, 40, 49, 50, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Loop_InnerBreak) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpLoopMerge %49 %40 None
OpBranchConditional %cond2 %35 %49
%35 = OpLabel
OpBranchConditional %cond3 %49 %37 ; break to inner merge
%37 = OpLabel
OpBranch %40
%40 = OpLabel ; inner loop's continue
OpBranch %30 ; backedge
%49 = OpLabel ; inner loop's merge
OpBranch %50
%50 = OpLabel ; outer loop's continue
OpBranch %20 ; outer loop's backege
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(),
ElementsAre(10, 20, 30, 35, 37, 40, 49, 50, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Loop_InnerContinue) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpLoopMerge %49 %40 None
OpBranchConditional %cond2 %35 %49
%35 = OpLabel
OpBranchConditional %cond3 %37 %49 ; continue to inner continue target
%37 = OpLabel
OpBranch %40
%40 = OpLabel ; inner loop's continue
OpBranch %30 ; backedge
%49 = OpLabel ; inner loop's merge
OpBranch %50
%50 = OpLabel ; outer loop's continue
OpBranch %20 ; outer loop's backege
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(),
ElementsAre(10, 20, 30, 35, 37, 40, 49, 50, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Loop_InnerContinueBreaks) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpLoopMerge %49 %40 None
OpBranchConditional %cond2 %35 %49
%35 = OpLabel
OpBranch %37
%37 = OpLabel
OpBranch %40
%40 = OpLabel ; inner loop's continue
OpBranchConditional %cond3 %30 %49 ; backedge and inner break
%49 = OpLabel ; inner loop's merge
OpBranch %50
%50 = OpLabel ; outer loop's continue
OpBranch %20 ; outer loop's backege
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(),
ElementsAre(10, 20, 30, 35, 37, 40, 49, 50, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Loop_InnerContinueContinues) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpLoopMerge %49 %40 None
OpBranchConditional %cond2 %35 %49
%35 = OpLabel
OpBranch %37
%37 = OpLabel
OpBranch %40
%40 = OpLabel ; inner loop's continue
OpBranchConditional %cond3 %30 %50 ; backedge and continue to outer
%49 = OpLabel ; inner loop's merge
OpBranch %50
%50 = OpLabel ; outer loop's continue
OpBranch %20 ; outer loop's backege
%99 = OpLabel
OpReturn
)";
auto* p = parser(test::Assemble(assembly));
ASSERT_TRUE(p->BuildAndParseInternalModuleExceptFunctions()) << p->error();
FunctionEmitter fe(p, *spirv_function(100));
fe.RegisterBasicBlocks();
fe.ComputeBlockOrderAndPositions();
EXPECT_THAT(fe.block_order(),
ElementsAre(10, 20, 30, 35, 37, 40, 49, 50, 99));
}
TEST_F(SpvParserTest, ComputeBlockOrder_Loop_Loop_SwitchBackedgeBreakContinue) {
auto assembly = CommonTypes() + R"(
%100 = OpFunction %void None %voidfn
%10 = OpLabel
OpBranch %20
%20 = OpLabel
OpLoopMerge %99 %50 None
OpBranchConditional %cond %30 %99
%30 = OpLabel
OpLoopMerge %49 %40 None
OpBranchConditional %cond2 %35 %49
%35 = OpLabel
OpBranch %37
%37 = OpLabel
OpBranch %40
%40 = OpLabel