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Darwin x86_32: Ignore padding bit-fields when looking for "single 

element" structures.

llvm-svn: 71266
This commit is contained in:
Daniel Dunbar 2009-05-08 21:04:47 +00:00
parent 2e55cc5a4a
commit fdda3501a0
2 changed files with 11 additions and 4 deletions
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12
clang/lib/CodeGen/CGCall.cpp
View File

@ -204,11 +204,15 @@ static const Type *isSingleElementStruct(QualType T, ASTContext &Context) {
if (AT->getSize().getZExtValue() == 1)
FT = AT->getElementType();
if (isEmptyRecord(Context, FT)) {
// Ignore
} else if (Found) {
// Ignore empty records and padding bit-fields.
if (isEmptyRecord(Context, FT) ||
(FD->isBitField() && !FD->getIdentifier()))
continue;
if (Found)
return 0;
} else if (!CodeGenFunction::hasAggregateLLVMType(FT)) {
if (!CodeGenFunction::hasAggregateLLVMType(FT)) {
Found = FT.getTypePtr();
} else {
Found = isSingleElementStruct(FT, Context);

3
clang/test/CodeGen/x86_32-arguments.c
View File

@ -130,4 +130,7 @@ struct s29 { struct { } a[1]; char b; char c; } f29(void) {}
// RUN: grep 'define i16 @f30()' %t &&
struct s30 { char a; char b : 4; } f30(void) {}
// RUN: grep 'define float @f31()' %t &&
struct s31 { char : 0; float b; char : 0} f31(void) {}
// RUN: true