[clang] [X86] ExprConstant - correctly detect __builtin_ia32_ucmpw* builtins as unsigned comparisons (PR #169891)

[Simon Pilgrim via cfe-commits]

https://github.com/RKSimon created https://github.com/llvm/llvm-project/pull/169891

Fixes typo from #164026

>From ff232cb62482aad28548df2b6be3fd5102e0e2e2 Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev at redking.me.uk>
Date: Fri, 28 Nov 2025 10:09:14 +0000
Subject: [PATCH] [X86] ExprConstant - correctly detect __builtin_ia32_ucmpw*
 builtins as unsigned comparisons

Fixes typo from #164026
---
 clang/lib/AST/ExprConstant.cpp               | 2 +-
 clang/test/CodeGen/X86/avx512vlbw-builtins.c | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index cab17ecdc7b29..b986ee6ca4fa3 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -16978,7 +16978,7 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const CallExpr *E,
 
     bool IsUnsigned =
         (BuiltinOp >= clang::X86::BI__builtin_ia32_ucmpb128_mask &&
-         BuiltinOp <= clang::X86::BI__builtin_ia32_ucmpq512_mask);
+         BuiltinOp <= clang::X86::BI__builtin_ia32_ucmpw512_mask);
 
     APValue LHS, RHS;
     APSInt Mask, Opcode;
diff --git a/clang/test/CodeGen/X86/avx512vlbw-builtins.c b/clang/test/CodeGen/X86/avx512vlbw-builtins.c
index 16e113031bfda..f6f27d9c3da3d 100644
--- a/clang/test/CodeGen/X86/avx512vlbw-builtins.c
+++ b/clang/test/CodeGen/X86/avx512vlbw-builtins.c
@@ -475,6 +475,7 @@ __mmask8 test_mm_cmplt_epu16_mask(__m128i __a, __m128i __b) {
   // CHECK: icmp ult <8 x i16> %{{.*}}, %{{.*}}
   return (__mmask8)_mm_cmplt_epu16_mask(__a, __b);
 }
+TEST_CONSTEXPR(_mm_cmplt_epu16_mask(((__m128i)(__v8hu){12351, 47995, 11802, 16970, 16956, 13965, 33529, 18928}), ((__m128i)(__v8hu){48792, 59915, 50576, 62643, 3758, 16415, 7966, 39475})) == (__mmask8)0xAF);
 
 __mmask8 test_mm_mask_cmplt_epu16_mask(__mmask8 __u, __m128i __a, __m128i __b) {
   // CHECK-LABEL: test_mm_mask_cmplt_epu16_mask