1 files changed, 33 insertions, 0 deletions
diff --git a/test/CodeGen/X86/insertps-unfold-load-bug.ll b/test/CodeGen/X86/insertps-unfold-load-bug.ll
new file mode 100644
index 000000000000..bf7c4bc4d7b9
--- /dev/null
+++ b/test/CodeGen/X86/insertps-unfold-load-bug.ll
@@ -0,0 +1,33 @@
+; RUN: llc -mtriple=i686-unknown-unknown -mattr=+sse4.1 < %s | FileCheck %s -check-prefix=X32
+; RUN: llc -mtriple=x86_64-unknown-unknown -mattr=+sse4.1 < %s | FileCheck %s -check-prefix=X64
+
+; Test for case where insertps was folding the load of the insertion element, but a later optimization
+; was then manipulating the load.
+
+define <4 x float> @insertps_unfold(<4 x float>* %v0, <4 x float>* %v1) {
+; X32-LABEL: insertps_unfold:
+; X32:       # BB#0:
+; X32-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X32-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X32-NEXT:    movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; X32-NEXT:    movaps (%eax), %xmm0
+; X32-NEXT:    insertps {{.*#+}} xmm0 = xmm0[0,1,2],mem[0]
+; X32-NEXT:    addps %xmm1, %xmm0
+; X32-NEXT:    retl
+;
+; X64-LABEL: insertps_unfold:
+; X64:       # BB#0:
+; X64-NEXT:    movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; X64-NEXT:    movaps (%rdi), %xmm0
+; X64-NEXT:    insertps {{.*#+}} xmm0 = xmm0[0,1,2],mem[0]
+; X64-NEXT:    addps %xmm1, %xmm0
+; X64-NEXT:    retq
+  %a = getelementptr inbounds <4 x float>, <4 x float>* %v1, i64 0, i64 1
+  %b = load float, float* %a, align 4
+  %c = insertelement <4 x float> undef, float %b, i32 0
+  %d = load <4 x float>, <4 x float>* %v1, align 16
+  %e = load <4 x float>, <4 x float>* %v0, align 16
+  %f = shufflevector <4 x float> %e, <4 x float> %d, <4 x i32> <i32 0, i32 1, i32 2, i32 5>
+  %g = fadd <4 x float> %c, %f
+  ret <4 x float> %g
+}