From f614f2b95666b246c22e6c91826011b4b0912768 Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Wed, 5 Nov 2025 13:17:26 +0000
Subject: [PATCH] [X86] Add test coverage for #166534

---
 llvm/test/CodeGen/X86/pr166534.ll | 124 ++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 llvm/test/CodeGen/X86/pr166534.ll

diff --git a/llvm/test/CodeGen/X86/pr166534.ll b/llvm/test/CodeGen/X86/pr166534.ll
new file mode 100644
index 0000000000000..aef44cc3e40d0
--- /dev/null
+++ b/llvm/test/CodeGen/X86/pr166534.ll
@@ -0,0 +1,124 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-- -mcpu=x86-64    | FileCheck %s --check-prefixes=SSE2
+; RUN: llc < %s -mtriple=x86_64-- -mcpu=x86-64-v2 | FileCheck %s --check-prefixes=SSE4
+; RUN: llc < %s -mtriple=x86_64-- -mcpu=x86-64-v3 | FileCheck %s --check-prefixes=AVX2
+; RUN: llc < %s -mtriple=x86_64-- -mcpu=x86-64-v4 | FileCheck %s --check-prefixes=AVX512
+
+define void @pr166534(ptr %pa, ptr %pb, ptr %pc, ptr %pd) {
+; SSE2-LABEL: pr166534:
+; SSE2:       # %bb.0: # %entry
+; SSE2-NEXT:    movq (%rdi), %rax
+; SSE2-NEXT:    movq 8(%rdi), %r8
+; SSE2-NEXT:    movdqu (%rdi), %xmm0
+; SSE2-NEXT:    movq (%rsi), %r9
+; SSE2-NEXT:    movq 8(%rsi), %rdi
+; SSE2-NEXT:    movdqu (%rsi), %xmm1
+; SSE2-NEXT:    pcmpeqb %xmm0, %xmm1
+; SSE2-NEXT:    pmovmskb %xmm1, %esi
+; SSE2-NEXT:    xorl %r10d, %r10d
+; SSE2-NEXT:    cmpl $65535, %esi # imm = 0xFFFF
+; SSE2-NEXT:    sete %r10b
+; SSE2-NEXT:    orq %r10, (%rdx)
+; SSE2-NEXT:    cmpl $65535, %esi # imm = 0xFFFF
+; SSE2-NEXT:    jne .LBB0_2
+; SSE2-NEXT:  # %bb.1: # %if.then
+; SSE2-NEXT:    xorq %r9, %rax
+; SSE2-NEXT:    xorq %rdi, %r8
+; SSE2-NEXT:    xorl %edx, %edx
+; SSE2-NEXT:    orq %rax, %r8
+; SSE2-NEXT:    sete %dl
+; SSE2-NEXT:    orq %rdx, (%rcx)
+; SSE2-NEXT:  .LBB0_2: # %if.end
+; SSE2-NEXT:    retq
+;
+; SSE4-LABEL: pr166534:
+; SSE4:       # %bb.0: # %entry
+; SSE4-NEXT:    movq (%rdi), %rax
+; SSE4-NEXT:    movq 8(%rdi), %r8
+; SSE4-NEXT:    movdqu (%rdi), %xmm0
+; SSE4-NEXT:    movq (%rsi), %r9
+; SSE4-NEXT:    movq 8(%rsi), %rdi
+; SSE4-NEXT:    movdqu (%rsi), %xmm1
+; SSE4-NEXT:    pxor %xmm0, %xmm1
+; SSE4-NEXT:    xorl %esi, %esi
+; SSE4-NEXT:    ptest %xmm1, %xmm1
+; SSE4-NEXT:    sete %sil
+; SSE4-NEXT:    orq %rsi, (%rdx)
+; SSE4-NEXT:    ptest %xmm1, %xmm1
+; SSE4-NEXT:    jne .LBB0_2
+; SSE4-NEXT:  # %bb.1: # %if.then
+; SSE4-NEXT:    xorq %r9, %rax
+; SSE4-NEXT:    xorq %rdi, %r8
+; SSE4-NEXT:    xorl %edx, %edx
+; SSE4-NEXT:    orq %rax, %r8
+; SSE4-NEXT:    sete %dl
+; SSE4-NEXT:    orq %rdx, (%rcx)
+; SSE4-NEXT:  .LBB0_2: # %if.end
+; SSE4-NEXT:    retq
+;
+; AVX2-LABEL: pr166534:
+; AVX2:       # %bb.0: # %entry
+; AVX2-NEXT:    movq (%rdi), %rax
+; AVX2-NEXT:    movq 8(%rdi), %r8
+; AVX2-NEXT:    vmovdqu (%rdi), %xmm0
+; AVX2-NEXT:    movq (%rsi), %rdi
+; AVX2-NEXT:    vpxor (%rsi), %xmm0, %xmm0
+; AVX2-NEXT:    movq 8(%rsi), %rsi
+; AVX2-NEXT:    xorl %r9d, %r9d
+; AVX2-NEXT:    vptest %xmm0, %xmm0
+; AVX2-NEXT:    sete %r9b
+; AVX2-NEXT:    orq %r9, (%rdx)
+; AVX2-NEXT:    vptest %xmm0, %xmm0
+; AVX2-NEXT:    jne .LBB0_2
+; AVX2-NEXT:  # %bb.1: # %if.then
+; AVX2-NEXT:    xorq %rdi, %rax
+; AVX2-NEXT:    xorq %rsi, %r8
+; AVX2-NEXT:    xorl %edx, %edx
+; AVX2-NEXT:    orq %rax, %r8
+; AVX2-NEXT:    sete %dl
+; AVX2-NEXT:    orq %rdx, (%rcx)
+; AVX2-NEXT:  .LBB0_2: # %if.end
+; AVX2-NEXT:    retq
+;
+; AVX512-LABEL: pr166534:
+; AVX512:       # %bb.0: # %entry
+; AVX512-NEXT:    movq (%rdi), %rax
+; AVX512-NEXT:    movq 8(%rdi), %r8
+; AVX512-NEXT:    vmovdqu (%rdi), %xmm0
+; AVX512-NEXT:    movq (%rsi), %r9
+; AVX512-NEXT:    movq 8(%rsi), %rdi
+; AVX512-NEXT:    vpxor (%rsi), %xmm0, %xmm0
+; AVX512-NEXT:    xorl %esi, %esi
+; AVX512-NEXT:    vptest %xmm0, %xmm0
+; AVX512-NEXT:    sete %sil
+; AVX512-NEXT:    orq %rsi, (%rdx)
+; AVX512-NEXT:    vptest %xmm0, %xmm0
+; AVX512-NEXT:    jne .LBB0_2
+; AVX512-NEXT:  # %bb.1: # %if.then
+; AVX512-NEXT:    xorq %r9, %rax
+; AVX512-NEXT:    xorq %rdi, %r8
+; AVX512-NEXT:    xorl %edx, %edx
+; AVX512-NEXT:    orq %rax, %r8
+; AVX512-NEXT:    sete %dl
+; AVX512-NEXT:    orq %rdx, (%rcx)
+; AVX512-NEXT:  .LBB0_2: # %if.end
+; AVX512-NEXT:    retq
+entry:
+  %a = load i128, ptr %pa, align 8
+  %b = load i128, ptr %pb, align 8
+  %cmp = icmp eq i128 %a, %b
+  %conv1 = zext i1 %cmp to i128
+  %c = load i128, ptr %pc, align 8
+  %or = or i128 %c, %conv1
+  store i128 %or, ptr %pc, align 8
+  br i1 %cmp, label %if.then, label %if.end
+
+if.then:
+  %d = load i128, ptr %pd, align 8
+  %or7 = or i128 %d, %conv1
+  store i128 %or7, ptr %pd, align 8
+  br label %if.end
+
+if.end:
+  ret void
+}