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Fix function attribute handling on LLVM 3.3+.

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The issue was that when merging in the old attributes, attrs
wasn't assigned to, thus silently dropping all of them
(leading e.g. to noinline being omitted on functions containing
inline asm).

The new code hopefully also makes the intent clearer.
This commit is contained in:
David Nadlinger 2013-05-09 22:55:38 +02:00
parent 10f5d74737
commit a792ecbaf2
1 changed files with 7 additions and 12 deletions
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19
gen/functions.cpp
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@ -552,7 +552,10 @@ void DtoResolveFunction(FuncDeclaration* fdecl)
#if LDC_LLVM_VER >= 303
static void set_param_attrs(TypeFunction* f, llvm::Function* func, FuncDeclaration* fdecl)
{
llvm::AttributeSet attrs;
llvm::AttributeSet old = func->getAttributes();
llvm::AttributeSet existingAttrs[] = { old.getFnAttributes(), old.getRetAttributes() };
llvm::AttributeSet newAttrs = llvm::AttributeSet::get(gIR->context(), existingAttrs);
int idx = 0;
// handle implicit args
@ -560,7 +563,7 @@ static void set_param_attrs(TypeFunction* f, llvm::Function* func, FuncDeclarati
if (f->fty.X) { \
if (f->fty.X->attrs.hasAttributes()) { \
llvm::AttributeSet a = llvm::AttributeSet::get(gIR->context(), idx, f->fty.X->attrs); \
attrs = attrs.addAttributes(gIR->context(), idx, a); \
newAttrs = newAttrs.addAttributes(gIR->context(), idx, a); \
} \
idx++; \
}
@ -586,20 +589,12 @@ static void set_param_attrs(TypeFunction* f, llvm::Function* func, FuncDeclarati
{
unsigned i = idx + (f->fty.reverseParams ? n-k-1 : k);
llvm::AttributeSet as = llvm::AttributeSet::get(gIR->context(), i, a);
attrs = attrs.addAttributes(gIR->context(), i, as);
newAttrs = newAttrs.addAttributes(gIR->context(), i, as);
}
}
// Merge in any old attributes (attributes for the function itself are
// also stored in a list slot).
llvm::AttributeSet oldAttrs = func->getAttributes();
for (size_t i = 0; i < oldAttrs.getNumSlots(); ++i) {
attrs.addAttributes(gIR->context(), oldAttrs.getSlotIndex(i),
oldAttrs.getSlotAttributes(i));
}
// Store the final attribute set
func->setAttributes(attrs);
func->setAttributes(newAttrs);
}
#else
static void set_param_attrs(TypeFunction* f, llvm::Function* func, FuncDeclaration* fdecl)