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This patch fixes issues with vector constant folding not correctly handling scalar input operands if they require implicit truncation - this was tested with llvm-stress as recommended by Patrik H Hagglund. The patch ensures that integer input scalars from a build vector are correctly truncated before folding, and that constant integer scalar results are promoted to a legal type before inclusion in the new folded build vector. I have added another crash test case and also a test for UINT_TO_FP / SINT_TO_FP using an non-truncated scalar input, which was failing before this patch. Differential Revision: http://reviews.llvm.org/D9282 llvm-svn: 236308
14 lines
502 B
LLVM
14 lines
502 B
LLVM
; RUN: llc < %s -mtriple=i686-unknown -mattr=+avx | FileCheck %s
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; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx | FileCheck %s
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; Check that constant integers are correctly being truncated before float conversion
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define <4 x float> @test1() {
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; CHECK-LABEL: test1
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; CHECK: movaps {{.*#+}} xmm0 = [-1.000000e+00,0.000000e+00,-1.000000e+00,0.000000e+00]
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; CHECK-NEXT: ret
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%1 = trunc <4 x i3> <i3 -1, i3 -22, i3 7, i3 8> to <4 x i1>
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%2 = sitofp <4 x i1> %1 to <4 x float>
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ret <4 x float> %2
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}
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