MS ABI: Stick throw-related data into the .xdata section

This is a little nicer as it keeps the contents of .xdata away from
normal .rdata; we expect .xdata to be far colder than .rdata.

llvm-svn: 231534

1 files changed, 6 insertions, 3 deletions

diff --git a/clang/lib/CodeGen/MicrosoftCXXABI.cpp b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
index 9cb7d22e92f..5b39e61173b 100644
--- a/clang/lib/CodeGen/MicrosoftCXXABI.cpp
+++ b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
@@ -3286,9 +3286,10 @@ llvm::Constant *MicrosoftCXXABI::getCatchableType(QualType T,
   auto *GV = new llvm::GlobalVariable(
       CGM.getModule(), CTType, /*Constant=*/true, getLinkageForRTTI(T),
       llvm::ConstantStruct::get(CTType, Fields), StringRef(MangledName));
+  GV->setUnnamedAddr(true);
+  GV->setSection(".xdata");
   if (GV->isWeakForLinker())
     GV->setComdat(CGM.getModule().getOrInsertComdat(GV->getName()));
-  GV->setUnnamedAddr(true);
   return getImageRelativeConstant(GV);
 }
 
@@ -3391,9 +3392,10 @@ llvm::GlobalVariable *MicrosoftCXXABI::getCatchableTypeArray(QualType T) {
   CTA = new llvm::GlobalVariable(
       CGM.getModule(), CTAType, /*Constant=*/true, getLinkageForRTTI(T),
       llvm::ConstantStruct::get(CTAType, Fields), StringRef(MangledName));
+  CTA->setUnnamedAddr(true);
+  CTA->setSection(".xdata");
   if (CTA->isWeakForLinker())
     CTA->setComdat(CGM.getModule().getOrInsertComdat(CTA->getName()));
-  CTA->setUnnamedAddr(true);
   return CTA;
 }
 
@@ -3479,9 +3481,10 @@ llvm::GlobalVariable *MicrosoftCXXABI::getThrowInfo(QualType T) {
   auto *GV = new llvm::GlobalVariable(
       CGM.getModule(), TIType, /*Constant=*/true, getLinkageForRTTI(T),
       llvm::ConstantStruct::get(TIType, Fields), StringRef(MangledName));
+  GV->setUnnamedAddr(true);
+  GV->setSection(".xdata");
   if (GV->isWeakForLinker())
     GV->setComdat(CGM.getModule().getOrInsertComdat(GV->getName()));
-  GV->setUnnamedAddr(true);
   return GV;
 }