1 files changed, 21 insertions, 0 deletions
diff --git a/test/CodeGen/X86/widen_load-0.ll b/test/CodeGen/X86/widen_load-0.ll
new file mode 100644
index 0000000..f6c4af0
--- /dev/null
+++ b/test/CodeGen/X86/widen_load-0.ll
@@ -0,0 +1,21 @@
+; RUN: llc < %s -o - -march=x86-64 | FileCheck %s
+; PR4891
+
+; Both loads should happen before either store.
+
+; CHECK: movl  (%rdi), %eax
+; CHECK: movl  (%rsi), %ecx
+; CHECK: movl  %ecx, (%rdi)
+; CHECK: movl  %eax, (%rsi)
+
+define void @short2_int_swap(<2 x i16>* nocapture %b, i32* nocapture %c) nounwind {
+entry:
+  %0 = load <2 x i16>* %b, align 2                ; <<2 x i16>> [#uses=1]
+  %1 = load i32* %c, align 4                      ; <i32> [#uses=1]
+  %tmp1 = bitcast i32 %1 to <2 x i16>             ; <<2 x i16>> [#uses=1]
+  store <2 x i16> %tmp1, <2 x i16>* %b, align 2
+  %tmp5 = bitcast <2 x i16> %0 to <1 x i32>       ; <<1 x i32>> [#uses=1]
+  %tmp3 = extractelement <1 x i32> %tmp5, i32 0   ; <i32> [#uses=1]
+  store i32 %tmp3, i32* %c, align 4
+  ret void
+}