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8a77617721
Summary: This patch fixes an issue so that the right alias is printed when the instruction has tied operands. It checks the number of operands in the resulting instruction as opposed to the alias, and then skips over tied operands that should not be printed in the alias. This allows to generate the preferred assembly syntax for the AArch64 'ins' instruction, which should always be displayed as 'mov' according to the ARM Architecture Reference Manual. Several unit tests have changed as a result, but only to reflect the preferred disassembly. Some other InstAlias patterns (movk/bic/orr) needed a slight adjustment to stop them becoming the default and breaking other unit tests. Please note that the patch is mostly the same as https://reviews.llvm.org/D29219 which was reverted because of an issue found when running TableGen with the Address Sanitizer. That issue has been addressed in this iteration of the patch. Reviewers: rengolin, stoklund, huntergr, SjoerdMeijer, rovka Reviewed By: rengolin, SjoerdMeijer Subscribers: fhahn, aemerson, javed.absar, kristof.beyls, llvm-commits Differential Revision: https://reviews.llvm.org/D40030 llvm-svn: 318650
126 lines
4.4 KiB
LLVM
126 lines
4.4 KiB
LLVM
; RUN: llc < %s -mtriple aarch64-unknown-unknown -aarch64-neon-syntax=apple -asm-verbose=false | FileCheck %s
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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; Test the (concat_vectors (bitcast (scalar)), ..) pattern.
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define <8 x i8> @test_concat_scalar_v2i8_to_v8i8_dup(i32 %x) #0 {
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entry:
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; CHECK-LABEL: test_concat_scalar_v2i8_to_v8i8_dup:
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; CHECK-NEXT: dup.4h v0, w0
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; CHECK-NEXT: ret
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%t = trunc i32 %x to i16
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%0 = bitcast i16 %t to <2 x i8>
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%1 = shufflevector <2 x i8> %0, <2 x i8> undef, <8 x i32> <i32 0, i32 1, i32 0, i32 1, i32 0, i32 1, i32 0, i32 1>
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ret <8 x i8> %1
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}
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define <8 x i8> @test_concat_scalar_v4i8_to_v8i8_dup(i32 %x) #0 {
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entry:
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; CHECK-LABEL: test_concat_scalar_v4i8_to_v8i8_dup:
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; CHECK-NEXT: dup.2s v0, w0
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; CHECK-NEXT: ret
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%0 = bitcast i32 %x to <4 x i8>
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%1 = shufflevector <4 x i8> %0, <4 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 0, i32 1, i32 2, i32 3>
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ret <8 x i8> %1
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}
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define <8 x i16> @test_concat_scalar_v2i16_to_v8i16_dup(i32 %x) #0 {
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entry:
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; CHECK-LABEL: test_concat_scalar_v2i16_to_v8i16_dup:
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; CHECK-NEXT: dup.4s v0, w0
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; CHECK-NEXT: ret
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%0 = bitcast i32 %x to <2 x i16>
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%1 = shufflevector <2 x i16> %0, <2 x i16> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 2, i32 0, i32 1, i32 0, i32 1>
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ret <8 x i16> %1
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}
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define <8 x i8> @test_concat_scalars_2x_v2i8_to_v8i8(i32 %x, i32 %y) #0 {
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entry:
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; CHECK-LABEL: test_concat_scalars_2x_v2i8_to_v8i8:
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; CHECK-NEXT: fmov s0, w0
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; CHECK-NEXT: mov.h v0[1], w1
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; CHECK-NEXT: mov.h v0[3], w1
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; CHECK-NEXT: ret
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%tx = trunc i32 %x to i16
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%ty = trunc i32 %y to i16
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%bx = bitcast i16 %tx to <2 x i8>
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%by = bitcast i16 %ty to <2 x i8>
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%r = shufflevector <2 x i8> %bx, <2 x i8> %by, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 undef, i32 undef, i32 2, i32 3>
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ret <8 x i8> %r
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}
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define <8 x i8> @test_concat_scalars_2x_v4i8_to_v8i8_dup(i32 %x, i32 %y) #0 {
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entry:
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; CHECK-LABEL: test_concat_scalars_2x_v4i8_to_v8i8_dup:
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; CHECK-NEXT: fmov s0, w1
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; CHECK-NEXT: mov.s v0[1], w0
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; CHECK-NEXT: ret
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%bx = bitcast i32 %x to <4 x i8>
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%by = bitcast i32 %y to <4 x i8>
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%r = shufflevector <4 x i8> %bx, <4 x i8> %by, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 0, i32 1, i32 2, i32 3>
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ret <8 x i8> %r
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}
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define <8 x i16> @test_concat_scalars_2x_v2i16_to_v8i16_dup(i32 %x, i32 %y) #0 {
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entry:
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; CHECK-LABEL: test_concat_scalars_2x_v2i16_to_v8i16_dup:
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; CHECK-NEXT: fmov s0, w0
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; CHECK-NEXT: mov.s v0[1], w1
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; CHECK-NEXT: mov.s v0[2], w1
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; CHECK-NEXT: mov.s v0[3], w0
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; CHECK-NEXT: ret
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%bx = bitcast i32 %x to <2 x i16>
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%by = bitcast i32 %y to <2 x i16>
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%r = shufflevector <2 x i16> %bx, <2 x i16> %by, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 2, i32 3, i32 0, i32 1>
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ret <8 x i16> %r
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}
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; Also make sure we minimize bitcasts.
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; This is a pretty artificial testcase: make sure we bitcast to floating-point
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; if any of the scalars is floating-point.
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define <8 x i8> @test_concat_scalars_mixed_2x_v2i8_to_v8i8(float %dummy, i32 %x, half %y) #0 {
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entry:
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; CHECK-LABEL: test_concat_scalars_mixed_2x_v2i8_to_v8i8:
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; CHECK-NEXT: fmov s[[X:[0-9]+]], w0
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; CHECK-NEXT: mov.16b v0, v[[X]]
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; CHECK-NEXT: mov.h v0[1], v1[0]
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; CHECK-NEXT: mov.h v0[2], v[[X]][0]
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; CHECK-NEXT: mov.h v0[3], v1[0]
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; CHECK-NEXT: ret
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%t = trunc i32 %x to i16
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%0 = bitcast i16 %t to <2 x i8>
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%y0 = bitcast half %y to <2 x i8>
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%1 = shufflevector <2 x i8> %0, <2 x i8> %y0, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 0, i32 1, i32 2, i32 3>
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ret <8 x i8> %1
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}
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define <2 x float> @test_concat_scalars_fp_2x_v2i8_to_v8i8(float %dummy, half %x, half %y) #0 {
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entry:
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; CHECK-LABEL: test_concat_scalars_fp_2x_v2i8_to_v8i8:
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; CHECK-NEXT: mov.16b v0, v1
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; CHECK-NEXT: mov.h v0[1], v2[0]
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; CHECK-NEXT: mov.h v0[2], v1[0]
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; CHECK-NEXT: mov.h v0[3], v2[0]
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; CHECK-NEXT: ret
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%0 = bitcast half %x to <2 x i8>
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%y0 = bitcast half %y to <2 x i8>
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%1 = shufflevector <2 x i8> %0, <2 x i8> %y0, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 0, i32 1, i32 2, i32 3>
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%2 = bitcast <8 x i8> %1 to <2 x float>
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ret <2 x float> %2
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}
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define <4 x float> @test_concat_scalar_fp_v2i16_to_v16i8_dup(float %x) #0 {
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entry:
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; CHECK-LABEL: test_concat_scalar_fp_v2i16_to_v16i8_dup:
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; CHECK-NEXT: dup.4s v0, v0[0]
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; CHECK-NEXT: ret
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%0 = bitcast float %x to <2 x i16>
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%1 = shufflevector <2 x i16> %0, <2 x i16> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 2, i32 0, i32 1, i32 0, i32 1>
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%2 = bitcast <8 x i16> %1 to <4 x float>
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ret <4 x float> %2
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}
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attributes #0 = { nounwind }
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