[X86][SSE] Test case for PR2585

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266669 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/pr2585.ll b/test/CodeGen/X86/pr2585.ll
new file mode 100644 (file)
index 0000000..93adb17
--- /dev/null
+++ b/test/CodeGen/X86/pr2585.ll
@@ -0,0 +1,32 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X32
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X64
+
+external constant <4 x i32>            ; <<4 x i32>*>:0 [#uses=1]
+external constant <4 x i16>            ; <<4 x i16>*>:1 [#uses=1]
+
+define internal void @PR2585() {
+; X32-LABEL: PR2585:
+; X32:       # BB#0:
+; X32-NEXT:    pshuflw {{.*#+}} xmm0 = mem[0,2,2,3,4,5,6,7]
+; X32-NEXT:    pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,4,6,6,7]
+; X32-NEXT:    pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; X32-NEXT:    movq %xmm0, __unnamed_2
+; X32-NEXT:    retl
+;
+; X64-LABEL: PR2585:
+; X64:       # BB#0:
+; X64-NEXT:    pshuflw {{.*#+}} xmm0 = mem[0,2,2,3,4,5,6,7]
+; X64-NEXT:    pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,4,6,6,7]
+; X64-NEXT:    pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; X64-NEXT:    movq %xmm0, {{.*}}(%rip)
+; X64-NEXT:    retq
+       load <4 x i32>, <4 x i32>* @0, align 16         ; <<4 x i32>>:1 [#uses=1]
+       bitcast <4 x i32> %1 to <8 x i16>               ; <<8 x i16>>:2 [#uses=1]
+       shufflevector <8 x i16> %2, <8 x i16> undef, <8 x i32> < i32 0, i32 2, i32 4, i32 6, i32 undef, i32 undef, i32 undef, i32 undef >               ; <<8 x i16>>:3 [#uses=1]
+       bitcast <8 x i16> %3 to <2 x i64>               ; <<2 x i64>>:4 [#uses=1]
+       extractelement <2 x i64> %4, i32 0              ; <i64>:5 [#uses=1]
+       bitcast i64 %5 to <4 x i16>             ; <<4 x i16>>:6 [#uses=1]
+       store <4 x i16> %6, <4 x i16>* @1, align 8
+       ret void
+}