[X86] Add test case for Issue llvm#64655

Author: RKSimon

llvm/test/CodeGen/X86/pr64655.ll

@@ -0,0 +1,50 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; 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 @f(ptr %0) {
+; AVX2-LABEL: f:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    movzbl (%rdi), %eax
+; AVX2-NEXT:    movl %eax, %ecx
+; AVX2-NEXT:    shrb $2, %cl
+; AVX2-NEXT:    andb $1, %cl
+; AVX2-NEXT:    movl %eax, %edx
+; AVX2-NEXT:    andb $1, %dl
+; AVX2-NEXT:    vmovd %edx, %xmm0
+; AVX2-NEXT:    vpinsrb $4, %ecx, %xmm0, %xmm0
+; AVX2-NEXT:    movl %eax, %ecx
+; AVX2-NEXT:    shrb $3, %cl
+; AVX2-NEXT:    andb $1, %cl
+; AVX2-NEXT:    vpinsrb $6, %ecx, %xmm0, %xmm0
+; AVX2-NEXT:    movl %eax, %ecx
+; AVX2-NEXT:    shrb $4, %cl
+; AVX2-NEXT:    andb $1, %cl
+; AVX2-NEXT:    vpinsrb $8, %ecx, %xmm0, %xmm0
+; AVX2-NEXT:    movl %eax, %ecx
+; AVX2-NEXT:    shrb $5, %cl
+; AVX2-NEXT:    andb $1, %cl
+; AVX2-NEXT:    vpinsrb $10, %ecx, %xmm0, %xmm0
+; AVX2-NEXT:    movl %eax, %ecx
+; AVX2-NEXT:    shrb $6, %cl
+; AVX2-NEXT:    andb $1, %cl
+; AVX2-NEXT:    vpinsrb $12, %ecx, %xmm0, %xmm0
+; AVX2-NEXT:    shrb $7, %al
+; AVX2-NEXT:    vpinsrb $14, %eax, %xmm0, %xmm0
+; AVX2-NEXT:    movl $1, %eax
+; AVX2-NEXT:    vpinsrw $1, %eax, %xmm0, %xmm0
+; AVX2-NEXT:    vpsllw $15, %xmm0, %xmm0
+; AVX2-NEXT:    vpacksswb %xmm0, %xmm0, %xmm0
+; AVX2-NEXT:    vpmovmskb %xmm0, %eax
+; AVX2-NEXT:    movb %al, (%rdi)
+; AVX2-NEXT:    retq
+;
+; AVX512-LABEL: f:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    movb $1, 1(%rdi)
+; AVX512-NEXT:    retq
+  %2 = load <8 x i1>, ptr %0
+  %3 = insertelement <8 x i1> %2, i1 true, i32 1
+  store <8 x i1> %3, ptr %0
+  ret void
+}