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author | Eli Friedman <eli.friedman@gmail.com> | 2011-07-25 21:36:45 +0000 |
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committer | Eli Friedman <eli.friedman@gmail.com> | 2011-07-25 21:36:45 +0000 |
commit | 63f8dde4827c801499a9887c7a10ba43dac9df08 (patch) | |
tree | 3e33130c552dde6e76cfb921cb60a37abc451231 /test/CodeGen/X86/palignr.ll | |
parent | 275944afb55086d0b4b20d4d831de7c1c7507925 (diff) | |
download | llvm-63f8dde4827c801499a9887c7a10ba43dac9df08.tar.gz llvm-63f8dde4827c801499a9887c7a10ba43dac9df08.tar.bz2 llvm-63f8dde4827c801499a9887c7a10ba43dac9df08.tar.xz |
Get rid of an incorrect optimization for shuffles with PALIGNR and simplify isPALIGNRMask.
Addresses PR10466, although the crash from that PR only triggers in cases where DAGCombine misses optimizing a shuffle.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135980 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/palignr.ll')
-rw-r--r-- | test/CodeGen/X86/palignr.ll | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/test/CodeGen/X86/palignr.ll b/test/CodeGen/X86/palignr.ll index 3812c7238c..ddcb05c970 100644 --- a/test/CodeGen/X86/palignr.ll +++ b/test/CodeGen/X86/palignr.ll @@ -2,6 +2,7 @@ ; RUN: llc < %s -march=x86 -mcpu=yonah | FileCheck --check-prefix=YONAH %s define <4 x i32> @test1(<4 x i32> %A, <4 x i32> %B) nounwind { +; CHECK: test1: ; CHECK: pshufd ; CHECK-YONAH: pshufd %C = shufflevector <4 x i32> %A, <4 x i32> undef, <4 x i32> < i32 1, i32 2, i32 3, i32 0 > @@ -9,6 +10,7 @@ define <4 x i32> @test1(<4 x i32> %A, <4 x i32> %B) nounwind { } define <4 x i32> @test2(<4 x i32> %A, <4 x i32> %B) nounwind { +; CHECK: test2: ; CHECK: palignr ; CHECK-YONAH: shufps %C = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> < i32 1, i32 2, i32 3, i32 4 > @@ -16,43 +18,56 @@ define <4 x i32> @test2(<4 x i32> %A, <4 x i32> %B) nounwind { } define <4 x i32> @test3(<4 x i32> %A, <4 x i32> %B) nounwind { +; CHECK: test3: ; CHECK: palignr %C = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> < i32 1, i32 2, i32 undef, i32 4 > ret <4 x i32> %C } define <4 x i32> @test4(<4 x i32> %A, <4 x i32> %B) nounwind { +; CHECK: test4: ; CHECK: palignr %C = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> < i32 6, i32 7, i32 undef, i32 1 > ret <4 x i32> %C } define <4 x float> @test5(<4 x float> %A, <4 x float> %B) nounwind { +; CHECK: test5: ; CHECK: palignr %C = shufflevector <4 x float> %A, <4 x float> %B, <4 x i32> < i32 6, i32 7, i32 undef, i32 1 > ret <4 x float> %C } define <8 x i16> @test6(<8 x i16> %A, <8 x i16> %B) nounwind { +; CHECK: test6: ; CHECK: palignr %C = shufflevector <8 x i16> %A, <8 x i16> %B, <8 x i32> < i32 3, i32 4, i32 undef, i32 6, i32 7, i32 8, i32 9, i32 10 > ret <8 x i16> %C } define <8 x i16> @test7(<8 x i16> %A, <8 x i16> %B) nounwind { +; CHECK: test7: ; CHECK: palignr %C = shufflevector <8 x i16> %A, <8 x i16> %B, <8 x i32> < i32 undef, i32 6, i32 undef, i32 8, i32 9, i32 10, i32 11, i32 12 > ret <8 x i16> %C } -define <8 x i16> @test8(<8 x i16> %A, <8 x i16> %B) nounwind { -; CHECK: palignr - %C = shufflevector <8 x i16> %A, <8 x i16> %B, <8 x i32> < i32 undef, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 0 > - ret <8 x i16> %C -} - -define <16 x i8> @test9(<16 x i8> %A, <16 x i8> %B) nounwind { +define <16 x i8> @test8(<16 x i8> %A, <16 x i8> %B) nounwind { +; CHECK: test8: ; CHECK: palignr %C = shufflevector <16 x i8> %A, <16 x i8> %B, <16 x i32> < i32 5, i32 6, i32 7, i32 undef, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20 > ret <16 x i8> %C } + +; Check that we don't do unary (circular on single operand) palignr incorrectly. +; (It is possible, but before this testcase was committed, it was being done +; incorrectly. In particular, one of the operands of the palignr node +; was an UNDEF.) +define <8 x i16> @test9(<8 x i16> %A, <8 x i16> %B) nounwind { +; CHECK: test9: +; CHECK-NOT: palignr +; CHECK: pshufb + %C = shufflevector <8 x i16> %B, <8 x i16> %A, <8 x i32> < i32 undef, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 0 > + ret <8 x i16> %C +} + |