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Make VAARG work with x86 long double (which is

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10 bytes long, but is passed in 12/16 bytes).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58608 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2008-11-03 11:51:11 +00:00
parent 06140888b1
commit 5c58a3168f
2 changed files with 20 additions and 3 deletions
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6
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -3438,9 +3438,9 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) {
const Value *V = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
SDValue VAList = DAG.getLoad(TLI.getPointerTy(), Tmp1, Tmp2, V, 0);
// Increment the pointer, VAList, to the next vaarg
Tmp3 = DAG.getNode(ISD::ADD, TLI.getPointerTy(), VAList,
DAG.getConstant(VT.getSizeInBits()/8,
TLI.getPointerTy()));
Tmp3 = DAG.getNode(ISD::ADD, TLI.getPointerTy(), VAList,
DAG.getConstant(TLI.getTargetData()->getABITypeSize(VT.getTypeForMVT()),
TLI.getPointerTy()));
// Store the incremented VAList to the legalized pointer
Tmp3 = DAG.getStore(VAList.getValue(1), Tmp3, Tmp2, V, 0);
// Load the actual argument out of the pointer VAList

17
test/CodeGen/X86/2008-11-03-F80VAARG.ll Normal file
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@ -0,0 +1,17 @@
; RUN: llvm-as < %s | llc -march=x86 -o - | not grep 10
declare void @llvm.va_start(i8*) nounwind
declare void @llvm.va_copy(i8*, i8*) nounwind
declare void @llvm.va_end(i8*) nounwind
define x86_fp80 @test(...) nounwind {
%ap = alloca i8* ; <i8**> [#uses=3]
%v1 = bitcast i8** %ap to i8* ; <i8*> [#uses=1]
call void @llvm.va_start(i8* %v1)
%t1 = va_arg i8** %ap, x86_fp80 ; <x86_fp80> [#uses=1]
%t2 = va_arg i8** %ap, x86_fp80 ; <x86_fp80> [#uses=1]
%t = add x86_fp80 %t1, %t2 ; <x86_fp80> [#uses=1]
ret x86_fp80 %t
}