[clang] [X86] Finely handle target of __builtin_ia32_cmp[p|s][s|d] from avx into sse/sse2/avx (PR #84136)

[Phoebe Wang via cfe-commits]

================
@@ -34,6 +34,60 @@ __m128 test_mm_andnot_ps(__m128 A, __m128 B) {
   return _mm_andnot_ps(A, B);
 }
 
+__m128 test_mm_cmp_ps_eq_oq(__m128 a, __m128 b) {
+  // CHECK-LABEL: test_mm_cmp_ps_eq_oq
+  // CHECK: fcmp oeq <4 x float> %{{.*}}, %{{.*}}
+  return _mm_cmp_ps(a, b, _CMP_EQ_OQ);
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phoebewang wrote:

I don't understand why moving them here. Shouldn't they emit error without avx?

https://github.com/llvm/llvm-project/pull/84136
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