tint/hlsl: fix RemoveContinueInSwitch transform to handle nested switch statements
Rework the transform so that it handles a continue within a switch
nested within switches within a loop. Also make the transform only
generate a single bool variable per loop, rather than per continue
statement.
Bug: tint:1080
Change-Id: I626cf4aa35e900ccc8ad08712ff1393c91587f10
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/151041
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Ben Clayton <bclayton@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
diff --git a/test/tint/loops/nested_loop_switch_loop_switch_switch.wgsl b/test/tint/loops/nested_loop_switch_loop_switch_switch.wgsl
new file mode 100644
index 0000000..c152681
--- /dev/null
+++ b/test/tint/loops/nested_loop_switch_loop_switch_switch.wgsl
@@ -0,0 +1,31 @@
+@compute @workgroup_size(1)
+fn main() {
+ var k = 0;
+ for (var i = 0; i < 2; i += 2) {
+ switch(i) {
+ case 0: {
+ for (var j = 0; j < 2; j += 2) {
+ switch(j) {
+ case 0: {
+ continue; // j loop
+ }
+ case 1: {
+ switch (k) {
+ case 0: {
+ continue; // j loop
+ }
+ default: {
+ }
+ }
+ }
+ default: {
+ }
+ }
+ }
+ continue; // i loop
+ }
+ default: {
+ }
+ }
+ }
+}
