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Set sext/zext on function result. 

- <rdar://problem/6156739>

llvm-svn: 55815
This commit is contained in:
Daniel Dunbar 2008-09-05 00:57:45 +00:00
parent 50288e3c99
commit 2ffee610da
2 changed files with 34 additions and 5 deletions
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17
clang/lib/CodeGen/CodeGenModule.cpp
View File

@ -207,14 +207,21 @@ SetFunctionAttributesFromTypes(const Decl *FD,
FuncAttrs |= llvm::ParamAttr::NoReturn;
llvm::SmallVector<llvm::ParamAttrsWithIndex, 8> ParamAttrList;
if (FuncAttrs)
ParamAttrList.push_back(llvm::ParamAttrsWithIndex::get(0, FuncAttrs));
// Note that there is parallel code in CodeGenFunction::EmitCallExpr
bool AggregateReturn = CodeGenFunction::hasAggregateLLVMType(ArgTypes[0]);
if (AggregateReturn)
unsigned increment = 1;
if (CodeGenFunction::hasAggregateLLVMType(ArgTypes[0])) {
ParamAttrList.push_back(
llvm::ParamAttrsWithIndex::get(1, llvm::ParamAttr::StructRet));
unsigned increment = AggregateReturn ? 2 : 1;
++increment;
} else if (ArgTypes[0]->isPromotableIntegerType()) {
if (ArgTypes[0]->isSignedIntegerType()) {
FuncAttrs |= llvm::ParamAttr::SExt;
} else if (ArgTypes[0]->isUnsignedIntegerType()) {
FuncAttrs |= llvm::ParamAttr::ZExt;
}
}
if (FuncAttrs)
ParamAttrList.push_back(llvm::ParamAttrsWithIndex::get(0, FuncAttrs));
for (llvm::SmallVector<QualType, 8>::const_iterator i = ArgTypes.begin() + 1,
e = ArgTypes.end(); i != e; ++i, ++increment) {
QualType ParamType = *i;

22
clang/test/CodeGen/function-attributes.c Normal file
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@ -0,0 +1,22 @@
// RUN: clang -emit-llvm -o %t.clang.ll %s &&
// RUN: %llvmgcc -c --emit-llvm -o - %s | llvm-dis -f -o %t.gcc.ll &&
// RUN: grep "define" %t.clang.ll | sort > %t.clang.defs &&
// RUN: grep "define" %t.gcc.ll | sort > %t.gcc.defs &&
// RUN: diff %t.clang.defs %t.gcc.defs
signed char f0(int x) { return x; }
unsigned char f1(int x) { return x; }
void f2(signed char x) { }
void f3(unsigned char x) { }
signed short f4(int x) { return x; }
unsigned short f5(int x) { return x; }
void f6(signed short x) { }
void f7(unsigned short x) { }