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Support return of MMX values in 64-bit mode.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65152 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-02-20 20:43:02 +00:00
parent 9a65cfe7dd
commit 79fb3b434f
2 changed files with 28 additions and 3 deletions
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18
lib/Target/X86/X86ISelLowering.cpp
View File

@ -1071,9 +1071,21 @@ LowerCallResult(SDValue Chain, SDValue InFlag, CallSDNode *TheCall,
CopyVT = MVT::f80;
}
Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
CopyVT, InFlag).getValue(1);
SDValue Val = Chain.getValue(0);
SDValue Val;
if (Is64Bit && CopyVT.isVector() && CopyVT.getSizeInBits() == 64) {
// For x86-64, MMX values are returned in XMM0 and XMM1. Issue an
// extract_vector_elt to i64 and then bit_convert it to the desired type.
Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
MVT::v2i64, InFlag).getValue(1);
Val = Chain.getValue(0);
Val = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i64,
Val, DAG.getConstant(0, MVT::i64));
Val = DAG.getNode(ISD::BIT_CONVERT, dl, CopyVT, Val);
} else {
Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
CopyVT, InFlag).getValue(1);
Val = Chain.getValue(0);
}
InFlag = Chain.getValue(2);
if (CopyVT != VA.getValVT()) {

13
test/CodeGen/X86/ret-mmx.ll Normal file
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@ -0,0 +1,13 @@
; RUN: llvm-as < %s | llc -march=x86-64 -mattr=+mmx
; rdar://6602459
@g_v1di = external global <1 x i64>
define void @test_v1di() nounwind {
entry:
%call = call <1 x i64> @return_v1di() ; <<1 x i64>> [#uses=0]
store <1 x i64> %call, <1 x i64>* @g_v1di
ret void
}
declare <1 x i64> @return_v1di()