diff --git a/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp b/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp
index c723c9eeae1a..f015ad5c1f39 100644
--- a/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp
+++ b/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp
@@ -55,7 +55,7 @@ namespace {
 
   static cl::opt<bool>
   CommuteDef("coalescer-commute-instrs",
-             cl::init(false), cl::Hidden);
+             cl::init(true), cl::Hidden);
 
   static cl::opt<int>
   CommuteLimit("commute-limit",
diff --git a/llvm/test/CodeGen/X86/2007-04-25-MMX-PADDQ.ll b/llvm/test/CodeGen/X86/2007-04-25-MMX-PADDQ.ll
index 7ea9fbd2cdd5..ac85a9d72bbd 100644
--- a/llvm/test/CodeGen/X86/2007-04-25-MMX-PADDQ.ll
+++ b/llvm/test/CodeGen/X86/2007-04-25-MMX-PADDQ.ll
@@ -1,5 +1,5 @@
 ; RUN: llvm-as < %s | llc -o - -march=x86 -mattr=+mmx | grep paddq | count 2
-; RUN: llvm-as < %s | llc -o - -march=x86 -mattr=+mmx | grep movq | count 3
+; RUN: llvm-as < %s | llc -o - -march=x86 -mattr=+mmx | grep movq | count 2
 
 define <1 x i64> @unsigned_add3(<1 x i64>* %a, <1 x i64>* %b, i32 %count) {
 entry:
diff --git a/llvm/test/CodeGen/X86/coalescer-commute1.ll b/llvm/test/CodeGen/X86/coalescer-commute1.ll
index 6613ac2dbf75..0fae2a659466 100644
--- a/llvm/test/CodeGen/X86/coalescer-commute1.ll
+++ b/llvm/test/CodeGen/X86/coalescer-commute1.ll
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin -mattr=+sse2 -coalescer-commute-instrs | not grep movaps
+; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin -mattr=+sse2 | not grep movaps
 ; PR1877
 
 @NNTOT = weak global i32 0		; <i32*> [#uses=1]
diff --git a/llvm/test/CodeGen/X86/coalescer-commute3.ll b/llvm/test/CodeGen/X86/coalescer-commute3.ll
index 57204eb587f2..ea7563722536 100644
--- a/llvm/test/CodeGen/X86/coalescer-commute3.ll
+++ b/llvm/test/CodeGen/X86/coalescer-commute3.ll
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin -mattr=+sse2 -coalescer-commute-instrs | grep mov | count 6
+; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin -mattr=+sse2 | grep mov | count 6
 
 	%struct.quad_struct = type { i32, i32, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct*, %struct.quad_struct* }