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Allow an integer to be converted into an MMX type when it's used in an inline

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asm.
<rdar://problem/10106006>

llvm-svn: 151303
This commit is contained in:
Bill Wendling 2012-02-23 23:25:25 +00:00
parent af1ee4da6c
commit 1a35321235
2 changed files with 20 additions and 2 deletions
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10
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
View File

@ -352,10 +352,13 @@ static void getCopyToParts(SelectionDAG &DAG, DebugLoc DL,
assert(NumParts == 1 && "Do not know what to promote to!");
Val = DAG.getNode(ISD::FP_EXTEND, DL, PartVT, Val);
} else {
assert(PartVT.isInteger() && ValueVT.isInteger() &&
assert((PartVT.isInteger() || PartVT == MVT::x86mmx) &&
ValueVT.isInteger() &&
"Unknown mismatch!");
ValueVT = EVT::getIntegerVT(*DAG.getContext(), NumParts * PartBits);
Val = DAG.getNode(ExtendKind, DL, ValueVT, Val);
if (PartVT == MVT::x86mmx)
Val = DAG.getNode(ISD::BITCAST, DL, PartVT, Val);
}
} else if (PartBits == ValueVT.getSizeInBits()) {
// Different types of the same size.
@ -363,10 +366,13 @@ static void getCopyToParts(SelectionDAG &DAG, DebugLoc DL,
Val = DAG.getNode(ISD::BITCAST, DL, PartVT, Val);
} else if (NumParts * PartBits < ValueVT.getSizeInBits()) {
// If the parts cover less bits than value has, truncate the value.
assert(PartVT.isInteger() && ValueVT.isInteger() &&
assert((PartVT.isInteger() || PartVT == MVT::x86mmx) &&
ValueVT.isInteger() &&
"Unknown mismatch!");
ValueVT = EVT::getIntegerVT(*DAG.getContext(), NumParts * PartBits);
Val = DAG.getNode(ISD::TRUNCATE, DL, ValueVT, Val);
if (PartVT == MVT::x86mmx)
Val = DAG.getNode(ISD::BITCAST, DL, PartVT, Val);
}
// The value may have changed - recompute ValueVT.

12
test/CodeGen/X86/2012-02-23-mmx-inlineasm.ll Normal file
View File

@ -0,0 +1,12 @@
; RUN: llc -mcpu=i686 -mattr=+mmx < %s | FileCheck %s
; <rdar://problem/10106006>
define void @func() nounwind ssp {
; CHECK: psrlw %mm0, %mm1
entry:
call void asm sideeffect "psrlw $0, %mm1", "y,~{dirflag},~{fpsr},~{flags}"(i32 8) nounwind
unreachable
bb367: ; preds = %entry
ret void
}