[clang] [HLSL][SPIR-V] Add `-fspv-enable-maximal-reconvergence` flag to clang dxc. (PR #163474)

[Steven Perron via cfe-commits]

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@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -triple spirv1.6-unknown-vulkan1.3-compute -fspv-enable-maximal-reconvergence -emit-llvm -o - -O0 %s | FileCheck %s --check-prefixes=CHECK
+// RUN: %clang_cc1 -triple spirv1.6-unknown-vulkan1.3-compute -hlsl-entry test -fspv-enable-maximal-reconvergence -emit-llvm -o - -O0 %s | FileCheck %s --check-prefixes=CHECK-ENTRY
+
+[numthreads(1,1,1)]
+void main() {
+// CHECK: define void @main() [[attributeNumber:#[0-9]+]] {
+}
+
+// CHECK: attributes [[attributeNumber]] = {{.*}} "enable-maximal-reconvergence"="true" {{.*}}
+
+
+[numthreads(1,1,1)]
+void test() {
+// CHECK-ENTRY: define void @test() [[attributeNumber:#[0-9]+]] {
+}
+    
+// CHECK-ENTRY: attributes [[attributeNumber]] = {{.*}} "enable-maximal-reconvergence"="true" {{.*}}
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s-perron wrote:

Add the new line at the end of the file.

https://github.com/llvm/llvm-project/pull/163474