fix the definitions of ConstTextCoalSection/ConstDataCoalSection

to keep "Text" in sync with the "pure instructions" section attribute.
Lack of this attribute was preventing the assembler from emitting
multibyte noops instructions for templates (and inlines, and other
coalesced stuff) and was causing the assembler to mismatch .o files.

This fixes rdar://8018335

llvm-svn: 108461

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index a80cfc4b256..3b25714c04b 100644
--- a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -518,12 +518,13 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
                                    SectionKind::getText());
   ConstTextCoalSection
     = getContext().getMachOSection("__TEXT", "__const_coal", 
-                                   MCSectionMachO::S_COALESCED,
+                                   MCSectionMachO::S_COALESCED |
+                                   MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
                                    SectionKind::getText());
   ConstDataCoalSection
     = getContext().getMachOSection("__DATA","__const_coal",
                                    MCSectionMachO::S_COALESCED,
-                                   SectionKind::getText());
+                                   SectionKind::getReadOnly());
   ConstDataSection  // .const_data
     = getContext().getMachOSection("__DATA", "__const", 0,
                                    SectionKind::getReadOnlyWithRel());