e6ad9ef4e7
The basic idea to this is that a) having a single canonical type makes CSE easier, and b) many of our transforms are inconsistent about which types we end up with based on visit order. I'm restricting this to constants as for non-constants, we'd have to decide whether the simplicity was worth extra instructions. For constants, there are no extra instructions. We chose the canonical type as i64 arbitrarily. We might consider changing this to something else in the future if we have cause. Differential Revision: https://reviews.llvm.org/D115387
63 lines
3.5 KiB
LLVM
63 lines
3.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; Test that the reverse is eliminated if the output and all the inputs
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; of the instruction are calls to reverse.
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define <vscale x 4 x i32> @binop_reverse(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b) {
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; CHECK-LABEL: @binop_reverse(
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; CHECK-NEXT: [[ADD1:%.*]] = add <vscale x 4 x i32> [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret <vscale x 4 x i32> [[ADD1]]
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;
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%reva = tail call <vscale x 4 x i32> @llvm.experimental.vector.reverse.nxv4i32(<vscale x 4 x i32> %a)
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%revb = tail call <vscale x 4 x i32> @llvm.experimental.vector.reverse.nxv4i32(<vscale x 4 x i32> %b)
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%add = add <vscale x 4 x i32> %reva, %revb
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%revadd = tail call <vscale x 4 x i32> @llvm.experimental.vector.reverse.nxv4i32(<vscale x 4 x i32> %add)
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ret <vscale x 4 x i32> %revadd
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}
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define <vscale x 4 x i32> @binop_reverse_splat_RHS(<vscale x 4 x i32> %a, i32 %b) {
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; CHECK-LABEL: @binop_reverse_splat_RHS(
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; CHECK-NEXT: [[SPLAT_INSERT:%.*]] = insertelement <vscale x 4 x i32> poison, i32 [[B:%.*]], i64 0
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; CHECK-NEXT: [[SPLAT:%.*]] = shufflevector <vscale x 4 x i32> [[SPLAT_INSERT]], <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
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; CHECK-NEXT: [[UDIV1:%.*]] = udiv <vscale x 4 x i32> [[A:%.*]], [[SPLAT]]
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; CHECK-NEXT: ret <vscale x 4 x i32> [[UDIV1]]
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;
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%reva = tail call <vscale x 4 x i32> @llvm.experimental.vector.reverse.nxv4i32(<vscale x 4 x i32> %a)
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%splat_insert = insertelement <vscale x 4 x i32> poison, i32 %b, i32 0
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%splat = shufflevector <vscale x 4 x i32> %splat_insert, <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
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%udiv = udiv <vscale x 4 x i32> %reva, %splat
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%revadd = tail call <vscale x 4 x i32> @llvm.experimental.vector.reverse.nxv4i32(<vscale x 4 x i32> %udiv)
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ret <vscale x 4 x i32> %revadd
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}
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define <vscale x 4 x i32> @binop_reverse_splat_LHS(<vscale x 4 x i32> %a, i32 %b) {
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; CHECK-LABEL: @binop_reverse_splat_LHS(
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; CHECK-NEXT: [[SPLAT_INSERT:%.*]] = insertelement <vscale x 4 x i32> poison, i32 [[B:%.*]], i64 0
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; CHECK-NEXT: [[SPLAT:%.*]] = shufflevector <vscale x 4 x i32> [[SPLAT_INSERT]], <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
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; CHECK-NEXT: [[UDIV1:%.*]] = udiv <vscale x 4 x i32> [[SPLAT]], [[A:%.*]]
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; CHECK-NEXT: ret <vscale x 4 x i32> [[UDIV1]]
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;
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%reva = tail call <vscale x 4 x i32> @llvm.experimental.vector.reverse.nxv4i32(<vscale x 4 x i32> %a)
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%splat_insert = insertelement <vscale x 4 x i32> poison, i32 %b, i32 0
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%splat = shufflevector <vscale x 4 x i32> %splat_insert, <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
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%udiv = udiv <vscale x 4 x i32> %splat, %reva
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%revadd = tail call <vscale x 4 x i32> @llvm.experimental.vector.reverse.nxv4i32(<vscale x 4 x i32> %udiv)
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ret <vscale x 4 x i32> %revadd
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}
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define <vscale x 4 x float> @unop_reverse(<vscale x 4 x float> %a) {
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; CHECK-LABEL: @unop_reverse(
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; CHECK-NEXT: [[NEG1:%.*]] = fneg fast <vscale x 4 x float> [[A:%.*]]
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; CHECK-NEXT: ret <vscale x 4 x float> [[NEG1]]
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;
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%reva = tail call <vscale x 4 x float> @llvm.experimental.vector.reverse.nxv4f32(<vscale x 4 x float> %a)
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%neg = fneg fast <vscale x 4 x float> %reva
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%revneg = tail call <vscale x 4 x float> @llvm.experimental.vector.reverse.nxv4f32(<vscale x 4 x float> %neg)
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ret <vscale x 4 x float> %revneg
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}
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declare <vscale x 4 x float> @llvm.experimental.vector.reverse.nxv4f32(<vscale x 4 x float>)
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declare <vscale x 4 x i32> @llvm.experimental.vector.reverse.nxv4i32(<vscale x 4 x i32>)
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