[clang] [X86][Clang] VectorExprEvaluator::VisitCallExpr / InterpretBuiltin - Allow AVX/AVX512 IFMA madd52 intrinsics to be used in constexpr (PR #161056)

[NagaChaitanya Vellanki via cfe-commits]

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@@ -2,14 +2,17 @@
 // RUN: %clang_cc1 -x c -flax-vector-conversions=none -ffreestanding %s -triple=i386-apple-darwin -target-feature +avx512ifma -emit-llvm -o - -Wall -Werror | FileCheck %s
 // RUN: %clang_cc1 -x c++ -flax-vector-conversions=none -ffreestanding %s -triple=x86_64-apple-darwin -target-feature +avx512ifma -emit-llvm -o - -Wall -Werror | FileCheck %s
 // RUN: %clang_cc1 -x c++ -flax-vector-conversions=none -ffreestanding %s -triple=i386-apple-darwin -target-feature +avx512ifma -emit-llvm -o - -Wall -Werror | FileCheck %s
+// RUN: %clang_cc1 -x c++ -std=c++2a -fsyntax-only %s -triple=x86_64-unknown-unknown -target-feature +avx512ifma -ffreestanding -verify
+// RUN: %clang_cc1 -x c++ -std=c++2a -fsyntax-only %s -triple=x86_64-unknown-unknown -target-feature +avx512ifma -ffreestanding -fexperimental-new-constant-interpreter -verify
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chaitanyav wrote:

i was getting this warning on my mac 
`
/Users/nagachaitanyavellanki/scratch/llvm-project/clang/test/CodeGen/X86/avxifma-builtins.c:82:1: warning: 'static_assert' with no message is a C++17 extension [-Wc++17-extensions]
   82 | TEST_CONSTEXPR(match_v2di(_mm_madd52lo_avx_epu64((__m128i)((__v2du){5, 10}), (__m128i)((__v2du){100, 200}), (__m128i)((__v2du){7, 8})), 705, 1610));
      | ^
`

https://github.com/llvm/llvm-project/pull/161056