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Set alignment on static function level decls and VLAs. Fixes PR5060. 

llvm-svn: 82868
This commit is contained in:
Anders Carlsson 2009-09-26 18:16:06 +00:00
parent 62995c71a2
commit e33eed5c1e
2 changed files with 24 additions and 6 deletions
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17
clang/lib/CodeGen/CGDecl.cpp
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@ -103,10 +103,13 @@ CodeGenFunction::CreateStaticBlockVarDecl(const VarDecl &D,
}
const llvm::Type *LTy = CGM.getTypes().ConvertTypeForMem(Ty);
return new llvm::GlobalVariable(CGM.getModule(), LTy,
Ty.isConstant(getContext()), Linkage,
CGM.EmitNullConstant(D.getType()), Name, 0,
D.isThreadSpecified(), Ty.getAddressSpace());
llvm::GlobalVariable *GV =
new llvm::GlobalVariable(CGM.getModule(), LTy,
Ty.isConstant(getContext()), Linkage,
CGM.EmitNullConstant(D.getType()), Name, 0,
D.isThreadSpecified(), Ty.getAddressSpace());
GV->setAlignment(getContext().getDeclAlignInBytes(&D));
return GV;
}
void CodeGenFunction::EmitStaticBlockVarDecl(const VarDecl &D) {
@ -375,8 +378,10 @@ void CodeGenFunction::EmitLocalBlockVarDecl(const VarDecl &D) {
false, "tmp");
// Allocate memory for the array.
llvm::Value *VLA = Builder.CreateAlloca(llvm::Type::getInt8Ty(VMContext),
VLASize, "vla");
llvm::AllocaInst *VLA =
Builder.CreateAlloca(llvm::Type::getInt8Ty(VMContext), VLASize, "vla");
VLA->setAlignment(getContext().getDeclAlignInBytes(&D));
DeclPtr = Builder.CreateBitCast(VLA, LElemPtrTy, "tmp");
}

13
clang/test/CodeGen/PR5060-align.c Normal file
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@ -0,0 +1,13 @@
// RUN: clang-cc -emit-llvm %s -o - -verify | FileCheck %s
// CHECK: @foo.p = internal global i8 0, align 32
char *foo(void) {
static char p __attribute__((aligned(32)));
return &p;
}
void bar(long n) {
// CHECK: align 32
char p[n] __attribute__((aligned(32)));
}