commit b8b0c21918d43d64ccd34c795431f9b3bfd03514
author dan sinclair <dsinclair@chromium.org> Thu Oct 20 22:45:50 2022 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> Thu Oct 20 22:45:50 2022 +0000
tree 0d3d655c4dff41bd7896c01e5a6578853b7386ec
parent f8c07d4753a32b62b52ba86e8ae0dba4830063b3

Add break-if support.

This CL adds support for `break-if` to Tint.

Bug: tint:1633, tint:1451
Change-Id: I30dfd62a3e09255624ff76ebe0cdd3a3c7cf9c5f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/106420
Auto-Submit: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: dan sinclair <dsinclair@google.com>

src/tint/writer/hlsl/generator_impl.cc

diff --git a/src/tint/writer/hlsl/generator_impl.cc b/src/tint/writer/hlsl/generator_impl.cc
index 1dc3b10..e42274d 100644
--- a/src/tint/writer/hlsl/generator_impl.cc
+++ b/src/tint/writer/hlsl/generator_impl.cc
@@ -942,6 +942,16 @@
     return true;
 }
 
+bool GeneratorImpl::EmitBreakIf(const ast::BreakIfStatement* b) {
+    auto out = line();
+    out << "if (";
+    if (!EmitExpression(out, b->condition)) {
+        return false;
+    }
+    out << ") { break; }";
+    return true;
+}
+
 bool GeneratorImpl::EmitCall(std::ostream& out, const ast::CallExpression* expr) {
     auto* call = builder_.Sem().Get<sem::Call>(expr);
     auto* target = call->Target();
@@ -3591,6 +3601,9 @@
         [&](const ast::BreakStatement* b) {  //
             return EmitBreak(b);
         },
+        [&](const ast::BreakIfStatement* b) {  //
+            return EmitBreakIf(b);
+        },
         [&](const ast::CallStatement* c) {  //
             auto out = line();
             if (!EmitCall(out, c->expr)) {