--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/CodeGen/X86/commute-two-addr.ll	Thu Dec 12 13:56:28 2013 +0900
@@ -0,0 +1,62 @@
+; The register allocator can commute two-address instructions to avoid
+; insertion of register-register copies.
+
+; Make sure there are only 3 mov's for each testcase
+; RUN: llc < %s -mtriple=i686-pc-linux-gnu   -mcpu=corei7 | FileCheck %s -check-prefix=LINUX
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7 | FileCheck %s -check-prefix=DARWIN
+
+
+@G = external global i32                ; <i32*> [#uses=2]
+
+declare void @ext(i32)
+
+define i32 @t1(i32 %X, i32 %Y) nounwind {
+; LINUX-LABEL: t1:
+; LINUX: movl 4(%esp), %eax
+; LINUX: movl 8(%esp), %ecx
+; LINUX: addl %eax, %ecx
+; LINUX: movl %ecx, G
+        %Z = add i32 %X, %Y             ; <i32> [#uses=1]
+        store i32 %Z, i32* @G
+        ret i32 %X
+}
+
+define i32 @t2(i32 %X, i32 %Y) nounwind {
+; LINUX-LABEL: t2:
+; LINUX: movl 4(%esp), %eax
+; LINUX: movl 8(%esp), %ecx
+; LINUX: xorl %eax, %ecx
+; LINUX: movl %ecx, G
+        %Z = xor i32 %X, %Y             ; <i32> [#uses=1]
+        store i32 %Z, i32* @G
+        ret i32 %X
+}
+
+; rdar://8762995
+%0 = type { i64, i32 }
+
+define %0 @t3(i32 %lb, i8 zeroext %has_lb, i8 zeroext %lb_inclusive, i32 %ub, i8 zeroext %has_ub, i8 zeroext %ub_inclusive) nounwind {
+entry:
+; DARWIN-LABEL: t3:
+; DARWIN: shlq $32, %rcx
+; DARWIN-NEXT: orq %rcx, %rax
+; DARWIN-NEXT: shll $8
+; DARWIN-NOT: leaq
+  %tmp21 = zext i32 %lb to i64
+  %tmp23 = zext i32 %ub to i64
+  %tmp24 = shl i64 %tmp23, 32
+  %ins26 = or i64 %tmp24, %tmp21
+  %tmp28 = zext i8 %has_lb to i32
+  %tmp33 = zext i8 %has_ub to i32
+  %tmp34 = shl i32 %tmp33, 8
+  %tmp38 = zext i8 %lb_inclusive to i32
+  %tmp39 = shl i32 %tmp38, 16
+  %tmp43 = zext i8 %ub_inclusive to i32
+  %tmp44 = shl i32 %tmp43, 24
+  %ins31 = or i32 %tmp39, %tmp28
+  %ins36 = or i32 %ins31, %tmp34
+  %ins46 = or i32 %ins36, %tmp44
+  %tmp16 = insertvalue %0 undef, i64 %ins26, 0
+  %tmp19 = insertvalue %0 %tmp16, i32 %ins46, 1
+  ret %0 %tmp19
+}