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| author | Sanjay Patel <spatel@rotateright.com> | 2017-03-08 15:02:23 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2017-03-08 15:02:23 +0000 |
| commit | 62906af379fb6f27b57e28ed3224a50c4242e35c (patch) | |
| tree | 23cf2b2e17ae8aaa308c8cb5ded1c284347c370d /llvm/test/Transforms/InstCombine | |
| parent | 9ef577803870369dcfc0f2074e2302215679269b (diff) | |
| download | bcm5719-llvm-62906af379fb6f27b57e28ed3224a50c4242e35c.tar.gz bcm5719-llvm-62906af379fb6f27b57e28ed3224a50c4242e35c.zip | |
[InstCombine] avoid crashing on shuffle shrinkage when input type is not same as result type
llvm-svn: 297280
Diffstat (limited to 'llvm/test/Transforms/InstCombine')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/trunc.ll | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/trunc.ll b/llvm/test/Transforms/InstCombine/trunc.ll index ba72908d3c4..5597b578f01 100644 --- a/llvm/test/Transforms/InstCombine/trunc.ll +++ b/llvm/test/Transforms/InstCombine/trunc.ll @@ -520,3 +520,16 @@ define <3 x i31> @wide_splat3(<3 x i33> %x) { ret <3 x i31> %trunc } +; TODO: The shuffle extends the length of the input vector. Should we shrink this? + +define <8 x i8> @wide_lengthening_splat(<4 x i16> %v) { +; CHECK-LABEL: @wide_lengthening_splat( +; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i16> %v, <4 x i16> undef, <8 x i32> zeroinitializer +; CHECK-NEXT: [[TR:%.*]] = trunc <8 x i16> [[SHUF]] to <8 x i8> +; CHECK-NEXT: ret <8 x i8> [[TR]] +; + %shuf = shufflevector <4 x i16> %v, <4 x i16> %v, <8 x i32> zeroinitializer + %tr = trunc <8 x i16> %shuf to <8 x i8> + ret <8 x i8> %tr +} + |
