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Allow SelectionDAG::FoldConstantArithmetic to work when it's called with a vector VT but scalar values.

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llvm-svn: 207835
This commit is contained in:
Benjamin Kramer 2014-05-02 12:35:22 +00:00
parent fbcd004fb7
commit 96dab04f0f
2 changed files with 18 additions and 2 deletions
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10
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -2924,11 +2924,17 @@ SDValue SelectionDAG::FoldConstantArithmetic(unsigned Opcode, EVT VT,
}
}
assert((Scalar1 && Scalar2) ||
VT.getVectorNumElements() == Outputs.size() && "No scalar or vector!");
// Handle the scalar case first.
if (Scalar1 && Scalar2)
if (!VT.isVector())
return Outputs.back();
// Otherwise build a big vector out of the scalar elements we generated.
// We may have a vector type but a scalar result. Create a splat.
Outputs.resize(VT.getVectorNumElements(), Outputs.back());
// Build a big vector out of the scalar elements we generated.
return getNode(ISD::BUILD_VECTOR, SDLoc(), VT, Outputs);
}

10
test/CodeGen/X86/vector-idiv.ll
View File

@ -205,3 +205,13 @@ define <8 x i32> @test11(<8 x i32> %a) {
; AVX: vpadd
; AVX: vpmulld
}
define <2 x i16> @test12() {
%I8 = insertelement <2 x i16> zeroinitializer, i16 -1, i32 0
%I9 = insertelement <2 x i16> %I8, i16 -1, i32 1
%B9 = urem <2 x i16> %I9, %I9
ret <2 x i16> %B9
; AVX-LABEL: test12:
; AVX: xorps
}