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| author | Sanjay Patel <spatel@rotateright.com> | 2018-08-29 15:34:19 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2018-08-29 15:34:19 +0000 |
| commit | 3abd9f6bdce8f9f9eabe1a7097902bb22b5ceaaf (patch) | |
| tree | 49ae7f175837483e5e5cc860b925fb92712dfccf | |
| parent | dc7f04bcea8c150e34f07702d570cc203473ab47 (diff) | |
| download | bcm5719-llvm-3abd9f6bdce8f9f9eabe1a7097902bb22b5ceaaf.tar.gz bcm5719-llvm-3abd9f6bdce8f9f9eabe1a7097902bb22b5ceaaf.zip | |
[InstCombine] add test for vector demanded elements + shrinking; NFC
llvm-svn: 340933
| -rw-r--r-- | llvm/test/Transforms/InstCombine/shuffle-select-narrow.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/shuffle-select-narrow.ll b/llvm/test/Transforms/InstCombine/shuffle-select-narrow.ll index 38974e2ec6e..51473b2b9e1 100644 --- a/llvm/test/Transforms/InstCombine/shuffle-select-narrow.ll +++ b/llvm/test/Transforms/InstCombine/shuffle-select-narrow.ll @@ -16,6 +16,21 @@ define <2 x i8> @narrow_shuffle_of_select(<2 x i1> %cmp, <4 x i8> %x, <4 x i8> % ret <2 x i8> %r } +; TODO: The 1st shuffle is not extending with undefs, but demanded elements should correct that. + +define <2 x i8> @narrow_shuffle_of_select_overspecified_extend(<2 x i1> %cmp, <4 x i8> %x, <4 x i8> %y) { +; CHECK-LABEL: @narrow_shuffle_of_select_overspecified_extend( +; CHECK-NEXT: [[WIDECMP:%.*]] = shufflevector <2 x i1> [[CMP:%.*]], <2 x i1> undef, <4 x i32> <i32 0, i32 1, i32 0, i32 1> +; CHECK-NEXT: [[WIDESEL:%.*]] = select <4 x i1> [[WIDECMP]], <4 x i8> [[X:%.*]], <4 x i8> [[Y:%.*]] +; CHECK-NEXT: [[R:%.*]] = shufflevector <4 x i8> [[WIDESEL]], <4 x i8> undef, <2 x i32> <i32 0, i32 1> +; CHECK-NEXT: ret <2 x i8> [[R]] +; + %widecmp = shufflevector <2 x i1> %cmp, <2 x i1> undef, <4 x i32> <i32 0, i32 1, i32 0, i32 1> + %widesel = select <4 x i1> %widecmp, <4 x i8> %x, <4 x i8> %y + %r = shufflevector <4 x i8> %widesel, <4 x i8> undef, <2 x i32> <i32 0, i32 1> + ret <2 x i8> %r +} + ; TODO: Verify that undef elements are acceptable for identity shuffle mask. Also check FP types. define <3 x float> @narrow_shuffle_of_select_undefs(<3 x i1> %cmp, <4 x float> %x, <4 x float> %y) { |
