[X86] Add missing _mm_broadcastsi128_si256 constexpr test coverage

[RKSimon]

No description provided.

[llvmbot]

@llvm/pr-subscribers-backend-x86

@llvm/pr-subscribers-clang

Author: Simon Pilgrim (RKSimon)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/160523.diff

1 Files Affected:

• (modified) clang/test/CodeGen/X86/avx2-builtins.c (+1)

diff --git a/clang/test/CodeGen/X86/avx2-builtins.c b/clang/test/CodeGen/X86/avx2-builtins.c
index 20233f6106146..eff2797e87c75 100644
--- a/clang/test/CodeGen/X86/avx2-builtins.c
+++ b/clang/test/CodeGen/X86/avx2-builtins.c
@@ -263,6 +263,7 @@ __m256i test_mm_broadcastsi128_si256(__m128i a) {
   // CHECK: shufflevector <2 x i64> %{{.*}}, <2 x i64> %{{.*}}, <4 x i32> <i32 0, i32 1, i32 0, i32 1>
   return _mm_broadcastsi128_si256(a);
 }
+TEST_CONSTEXPR(match_m256i(_mm_broadcastsi128_si256(((__m128i)(__v2di){42, -99})), 42, -99, 42, -99));
 
 __m128 test_mm_broadcastss_ps(__m128 a) {
   // CHECK-LABEL: test_mm_broadcastss_ps