From 9e71ceeaf94da094506ad3c9bdd5aae4f0a68359 Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Thu, 2 Feb 2017 17:23:57 +0000
Subject: [PATCH] [X86][SSE] Add test case for PR18344

llvm-svn: 293907
---
 llvm/test/CodeGen/X86/pr18344.ll | 89 ++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 llvm/test/CodeGen/X86/pr18344.ll

diff --git a/llvm/test/CodeGen/X86/pr18344.ll b/llvm/test/CodeGen/X86/pr18344.ll
new file mode 100644
index 000000000000..15bf91031ee8
--- /dev/null
+++ b/llvm/test/CodeGen/X86/pr18344.ll
@@ -0,0 +1,89 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+sse4.1 | FileCheck %s --check-prefix=X86
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse4.1 | FileCheck %s --check-prefix=X64
+
+%v4_varying_complex = type { <4 x float>, <4 x float> }
+
+define void @FFT(%v4_varying_complex* noalias nocapture %destination, float* noalias %re, <4 x i32>* noalias nocapture %ptr_cast_for_load) nounwind {
+; X86-LABEL: FFT:
+; X86:       # BB#0: # %begin
+; X86-NEXT:    pushl %ebx
+; X86-NEXT:    pushl %edi
+; X86-NEXT:    pushl %esi
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %edx
+; X86-NEXT:    movdqu (%edx), %xmm0
+; X86-NEXT:    pslld $4, %xmm0
+; X86-NEXT:    movd %xmm0, %edx
+; X86-NEXT:    pextrd $1, %xmm0, %esi
+; X86-NEXT:    pextrd $2, %xmm0, %edi
+; X86-NEXT:    pextrd $3, %xmm0, %ebx
+; X86-NEXT:    movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; X86-NEXT:    movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; X86-NEXT:    movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
+; X86-NEXT:    movss {{.*#+}} xmm3 = mem[0],zero,zero,zero
+; X86-NEXT:    movss %xmm0, 128(%eax)
+; X86-NEXT:    movss %xmm1, 164(%eax)
+; X86-NEXT:    movss %xmm2, 200(%eax)
+; X86-NEXT:    movss %xmm3, 236(%eax)
+; X86-NEXT:    popl %esi
+; X86-NEXT:    popl %edi
+; X86-NEXT:    popl %ebx
+; X86-NEXT:    retl
+;
+; X64-LABEL: FFT:
+; X64:       # BB#0: # %begin
+; X64-NEXT:    movdqu (%rdx), %xmm0
+; X64-NEXT:    pslld $4, %xmm0
+; X64-NEXT:    movd %xmm0, %rax
+; X64-NEXT:    movslq %eax, %r8
+; X64-NEXT:    sarq $32, %rax
+; X64-NEXT:    pextrq $1, %xmm0, %rdx
+; X64-NEXT:    movslq %edx, %rcx
+; X64-NEXT:    sarq $32, %rdx
+; X64-NEXT:    movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; X64-NEXT:    movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; X64-NEXT:    movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
+; X64-NEXT:    movss {{.*#+}} xmm3 = mem[0],zero,zero,zero
+; X64-NEXT:    movss %xmm0, 128(%rdi)
+; X64-NEXT:    movss %xmm1, 164(%rdi)
+; X64-NEXT:    movss %xmm2, 200(%rdi)
+; X64-NEXT:    movss %xmm3, 236(%rdi)
+; X64-NEXT:    retq
+begin:
+  %ptr_masked_load79 = load <4 x i32>, <4 x i32>* %ptr_cast_for_load, align 4
+  %mul__bitReversedProgramIndex_load = shl <4 x i32> %ptr_masked_load79, <i32 4, i32 4, i32 4, i32 4>
+
+  %offset32_1 = extractelement <4 x i32> %mul__bitReversedProgramIndex_load, i32 0
+  %ptroffset_1 = sext i32 %offset32_1 to i64
+  %offset32_2 = extractelement <4 x i32> %mul__bitReversedProgramIndex_load, i32 1
+  %ptroffset_2 = sext i32 %offset32_2 to i64
+  %offset32_3 = extractelement <4 x i32> %mul__bitReversedProgramIndex_load, i32 2
+  %ptroffset_3 = sext i32 %offset32_3 to i64
+  %offset32_4 = extractelement <4 x i32> %mul__bitReversedProgramIndex_load, i32 3
+  %ptroffset_4 = sext i32 %offset32_4 to i64
+
+  %ptrcast_1 = getelementptr float, float* %re, i64 %ptroffset_1
+  %val_1 = load float, float* %ptrcast_1, align 4
+  %ptrcast_2 = getelementptr float, float* %re, i64 %ptroffset_2
+  %val_2 = load float, float* %ptrcast_2, align 4
+  %ptrcast_3 = getelementptr float, float* %re, i64 %ptroffset_3
+  %val_3 = load float, float* %ptrcast_3, align 4
+  %ptrcast_4 = getelementptr float, float* %re, i64 %ptroffset_4
+  %val_4 = load float, float* %ptrcast_4, align 4
+
+  %destination_load_ptr2int_2void = bitcast %v4_varying_complex* %destination to i8*
+  %ptrcast1_1 = getelementptr inbounds %v4_varying_complex, %v4_varying_complex* %destination, i64 4, i32 0, i64 0
+  store float %val_1, float* %ptrcast1_1, align 4
+  %finalptr_2 = getelementptr i8, i8* %destination_load_ptr2int_2void, i64 164
+  %ptrcast1_2 = bitcast i8* %finalptr_2 to float*
+  store float %val_2, float* %ptrcast1_2, align 4
+  %finalptr_3 = getelementptr i8, i8* %destination_load_ptr2int_2void, i64 200
+  %ptrcast1_3 = bitcast i8* %finalptr_3 to float*
+  store float %val_3, float* %ptrcast1_3, align 4
+  %finalptr_4 = getelementptr i8, i8* %destination_load_ptr2int_2void, i64 236
+  %ptrcast1_4 = bitcast i8* %finalptr_4 to float*
+  store float %val_4, float* %ptrcast1_4, align 4
+  ret void
+}