1 files changed, 23 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2012-12-06-python27-miscompile.ll b/test/CodeGen/X86/2012-12-06-python27-miscompile.ll
new file mode 100644
index 0000000..d9effc9
--- /dev/null
+++ b/test/CodeGen/X86/2012-12-06-python27-miscompile.ll
@@ -0,0 +1,23 @@
+; RUN: llc < %s -march=x86 -mcpu=corei7 -mtriple=i686-pc-win32 | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.8.0"
+
+; Make sure that we are zeroing one memory location at a time using xorl and
+; not both using XMM registers.
+
+;CHECK: @foo
+;CHECK: xorl
+;CHECK-NOT: xmm
+;CHECK: ret
+define i32 @foo (i64* %so) nounwind uwtable ssp {
+entry:
+  %used = getelementptr inbounds i64* %so, i32 3
+  store i64 0, i64* %used, align 8
+  %fill = getelementptr inbounds i64* %so, i32 2
+  %L = load i64* %fill, align 8
+  store i64 0, i64* %fill, align 8
+  %cmp28 = icmp sgt i64 %L, 0
+  %R = sext i1 %cmp28 to i32
+  ret i32 %R
+}