diff --git a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index cf70ad6a2ecb..ea0d62e6ef39 100644
--- a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -524,14 +524,14 @@ const MCSection *TargetLoweringObjectFileMachO::
 SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
                        Mangler *Mang, const TargetMachine &TM) const {
   if (Kind.isText())
-    return TextSection;
- 
-  // If this is weak/linkonce, put this in a read only or data section depending
-  // on whether or not it's writable.
+    return GV->isWeakForLinker() ? TextCoalSection : TextSection;
+
+  // If this is weak/linkonce, put this in a coalescable section, either in text
+  // or data depending on if it is writable.
   if (GV->isWeakForLinker()) {
     if (Kind.isReadOnly())
-      return ReadOnlySection;
-    return DataSection;
+      return ConstTextCoalSection;
+    return DataCoalSection;
   }
 
   // FIXME: Alignment check should be handled by section classifier.
diff --git a/llvm/test/CodeGen/X86/global-sections.ll b/llvm/test/CodeGen/X86/global-sections.ll
index b38aea4e7bb5..194f59765e5b 100644
--- a/llvm/test/CodeGen/X86/global-sections.ll
+++ b/llvm/test/CodeGen/X86/global-sections.ll
@@ -20,7 +20,7 @@
 
 ; TODO: linux drops this into .rodata, we drop it into ".gnu.linkonce.r.G2"
 
-; DARWIN: .section __TEXT,__const{{$}}
+; DARWIN: .section __TEXT,__const_coal,coalesced
 ; DARWIN: _G2:
 ; DARWIN:    .long 42
 
@@ -70,6 +70,7 @@
 ; LINUX: .weak	foo_20_bar
 ; LINUX: foo_20_bar:
 
+; DARWIN: .section		__DATA,__datacoal_nt,coalesced
 ; DARWIN: .globl	"_foo bar"
 ; DARWIN:	.weak_definition "_foo bar"
 ; DARWIN: "_foo bar":
@@ -84,7 +85,7 @@
 ; LINUX:   .byte	1
 ; LINUX:   .size	G6, 1
 
-; DARWIN:  .section __TEXT,__const{{$}}
+; DARWIN:  .section __TEXT,__const_coal,coalesced
 ; DARWIN:  .globl _G6
 ; DARWIN:  .weak_definition _G6
 ; DARWIN:_G6:
@@ -130,7 +131,7 @@
 @G10 = weak global [100 x i32] zeroinitializer, align 32 ; <[100 x i32]*> [#uses=0]
 
 
-; DARWIN: 	.section	__DATA,__data{{$}}
+; DARWIN: 	.section	__DATA,__datacoal_nt,coalesced
 ; DARWIN: .globl _G10
 ; DARWIN:	.weak_definition _G10
 ; DARWIN:	.align	5