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Fix constant folding for one lane vector types. Constant folding one lane vector types not returns a vector instead of a scalar.

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llvm-svn: 180254
This commit is contained in:
Silviu Baranga 2013-04-25 09:32:33 +00:00
parent d89ddc118c
commit c656dd9bdd
2 changed files with 19 additions and 1 deletions
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2
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -2785,7 +2785,7 @@ SDValue SelectionDAG::FoldConstantArithmetic(unsigned Opcode, EVT VT,
}
// Handle the scalar case first.
if (Outputs.size() == 1)
if (Scalar1 && Scalar2)
return Outputs.back();
// Otherwise build a big vector out of the scalar elements we generated.

18
test/CodeGen/ARM/v1-constant-fold.ll Normal file
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@ -0,0 +1,18 @@
; RUN: llc < %s -mtriple=armv7-none-linux-gnueabi -mattr=+v7,+vfp3,-neon | FileCheck %s
; PR15611. Check that we don't crash when constant folding v1i32 types.
; CHECK: foo:
define void @foo(i32 %arg) {
bb:
%tmp = insertelement <4 x i32> undef, i32 %arg, i32 0
%tmp1 = insertelement <4 x i32> %tmp, i32 0, i32 1
%tmp2 = insertelement <4 x i32> %tmp1, i32 0, i32 2
%tmp3 = insertelement <4 x i32> %tmp2, i32 0, i32 3
%tmp4 = add <4 x i32> %tmp3, <i32 -1, i32 -1, i32 -1, i32 -1>
; CHECK: bl bar
tail call void @bar(<4 x i32> %tmp4)
ret void
}
declare void @bar(<4 x i32>)