92 lines
3.2 KiB
LLVM
92 lines
3.2 KiB
LLVM
; RUN: llc < %s -march=x86-64 -mtriple=x86_64-unknown-linux-gnu -mcpu=core-avx2 | FileCheck %s
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; Test that we correctly fold a shuffle that performs a swizzle of another
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; shuffle node according to the rule
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; shuffle (shuffle (x, undef, M0), undef, M1) -> shuffle(x, undef, M2)
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;
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; We only do this if the resulting mask is legal to avoid introducing an
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; illegal shuffle that is expanded into a sub-optimal sequence of instructions
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; during lowering stage.
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; Check that we produce a single vector permute / shuffle in all cases.
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define <8 x i32> @swizzle_1(<8 x i32> %v) {
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%1 = shufflevector <8 x i32> %v, <8 x i32> undef, <8 x i32> <i32 3, i32 1, i32 2, i32 0, i32 7, i32 5, i32 6, i32 4>
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%2 = shufflevector <8 x i32> %1, <8 x i32> undef, <8 x i32> <i32 1, i32 0, i32 2, i32 3, i32 7, i32 5, i32 6, i32 4>
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ret <8 x i32> %2
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}
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; CHECK-LABEL: swizzle_1
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; CHECK: vpermd
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; CHECK-NOT: vpermd
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; CHECK: ret
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define <8 x i32> @swizzle_2(<8 x i32> %v) {
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%1 = shufflevector <8 x i32> %v, <8 x i32> undef, <8 x i32> <i32 6, i32 7, i32 4, i32 5, i32 0, i32 1, i32 2, i32 3>
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%2 = shufflevector <8 x i32> %1, <8 x i32> undef, <8 x i32> <i32 6, i32 7, i32 4, i32 5, i32 0, i32 1, i32 2, i32 3>
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ret <8 x i32> %2
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}
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; CHECK-LABEL: swizzle_2
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; CHECK: vpshufd $78
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; CHECK-NOT: vpermd
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; CHECK-NOT: vpshufd
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; CHECK: ret
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define <8 x i32> @swizzle_3(<8 x i32> %v) {
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%1 = shufflevector <8 x i32> %v, <8 x i32> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 2, i32 3, i32 0, i32 1>
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%2 = shufflevector <8 x i32> %1, <8 x i32> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 2, i32 3, i32 0, i32 1>
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ret <8 x i32> %2
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}
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; CHECK-LABEL: swizzle_3
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; CHECK: vpshufd $78
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; CHECK-NOT: vpermd
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; CHECK-NOT: vpshufd
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; CHECK: ret
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define <8 x i32> @swizzle_4(<8 x i32> %v) {
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%1 = shufflevector <8 x i32> %v, <8 x i32> undef, <8 x i32> <i32 4, i32 7, i32 5, i32 6, i32 3, i32 2, i32 0, i32 1>
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%2 = shufflevector <8 x i32> %1, <8 x i32> undef, <8 x i32> <i32 4, i32 7, i32 5, i32 6, i32 3, i32 2, i32 0, i32 1>
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ret <8 x i32> %2
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}
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; CHECK-LABEL: swizzle_4
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; CHECK: vpermd
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; CHECK-NOT: vpermd
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; CHECK: ret
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define <8 x i32> @swizzle_5(<8 x i32> %v) {
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%1 = shufflevector <8 x i32> %v, <8 x i32> undef, <8 x i32> <i32 7, i32 4, i32 6, i32 5, i32 0, i32 2, i32 1, i32 3>
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%2 = shufflevector <8 x i32> %1, <8 x i32> undef, <8 x i32> <i32 7, i32 4, i32 6, i32 5, i32 0, i32 2, i32 1, i32 3>
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ret <8 x i32> %2
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}
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; CHECK-LABEL: swizzle_5
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; CHECK: vpermd
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; CHECK-NOT: vpermd
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; CHECK: ret
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define <8 x i32> @swizzle_6(<8 x i32> %v) {
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%1 = shufflevector <8 x i32> %v, <8 x i32> undef, <8 x i32> <i32 2, i32 1, i32 3, i32 0, i32 4, i32 7, i32 6, i32 5>
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%2 = shufflevector <8 x i32> %1, <8 x i32> undef, <8 x i32> <i32 2, i32 1, i32 3, i32 0, i32 4, i32 7, i32 6, i32 5>
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ret <8 x i32> %2
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}
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; CHECK-LABEL: swizzle_6
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; CHECK: vpermd
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; CHECK-NOT: vpermd
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; CHECK: ret
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define <8 x i32> @swizzle_7(<8 x i32> %v) {
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%1 = shufflevector <8 x i32> %v, <8 x i32> undef, <8 x i32> <i32 0, i32 3, i32 1, i32 2, i32 5, i32 4, i32 6, i32 7>
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%2 = shufflevector <8 x i32> %1, <8 x i32> undef, <8 x i32> <i32 0, i32 3, i32 1, i32 2, i32 5, i32 4, i32 6, i32 7>
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ret <8 x i32> %2
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}
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; CHECK-LABEL: swizzle_7
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; CHECK: vpermd
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; CHECK-NOT: vpermd
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; CHECK: ret
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