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Use movq to move 64 bits in and out of mmx registers. 

Fixes PR4669

llvm-svn: 77940
This commit is contained in:
Rafael Espindola 2009-08-03 02:45:34 +00:00
parent 8b9deebba3
commit 18ba271a79
4 changed files with 23 additions and 4 deletions
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5
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -4447,6 +4447,11 @@ X86TargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) {
DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i32,
Op.getOperand(0))));
if (Op.getValueType() == MVT::v1i64 && Op.getOperand(0).getValueType() == MVT::i64)
return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v1i64,
DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i64,
Op.getOperand(0)));
SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0));
MVT VT = MVT::v2i32;
switch (Op.getValueType().getSimpleVT()) {

10
llvm/lib/Target/X86/X86InstrMMX.td
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@ -163,10 +163,14 @@ def MMX_MOVD64to64rr : MMXRI<0x6E, MRMSrcReg, (outs VR64:$dst), (ins GR64:$src),
"movd\t{$src, $dst|$dst, $src}",
[]>;
let neverHasSideEffects = 1 in
def MMX_MOVD64from64rr : MMXRI<0x7E, MRMDestReg,
let neverHasSideEffects = 1 in {
def MMX_MOVD64from64rr : MMXRI<0x7F, MRMDestReg,
(outs GR64:$dst), (ins VR64:$src),
"movd\t{$src, $dst|$dst, $src}", []>;
"movq\t{$src, $dst|$dst, $src}", []>;
def MMX_MOVD64rrv164 : MMXI<0x6F, MRMSrcReg, (outs VR64:$dst), (ins GR64:$src),
"movq\t{$src, $dst|$dst, $src}",
[(set VR64:$dst, (v1i64 (scalar_to_vector GR64:$src)))]>;
}
let neverHasSideEffects = 1 in
def MMX_MOVQ64rr : MMXI<0x6F, MRMSrcReg, (outs VR64:$dst), (ins VR64:$src),

10
llvm/test/CodeGen/X86/2009-08-02-mmx-scalar-to-vector.ll Normal file
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@ -0,0 +1,10 @@
; RUN: llvm-as < %s | llc -march=x86-64
; PR4669
declare <1 x i64> @llvm.x86.mmx.pslli.q(<1 x i64>, i32)
define <1 x i64> @test(i64 %t) {
entry:
%t1 = insertelement <1 x i64> undef, i64 %t, i32 0
%t2 = tail call <1 x i64> @llvm.x86.mmx.pslli.q(<1 x i64> %t1, i32 48)
ret <1 x i64> %t2
}

2
llvm/test/CodeGen/X86/mmx-bitcast-to-i64.ll
View File

@ -1,4 +1,4 @@
; RUN: llvm-as < %s | llc -march=x86-64 | grep movd | count 4
; RUN: llvm-as < %s | llc -march=x86-64 | grep movq | count 8
define i64 @foo(<1 x i64>* %p) {
%t = load <1 x i64>* %p