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
94 lines
4.0 KiB
LLVM
94 lines
4.0 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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; insertelements should fold to shuffle
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define <4 x float> @foo(<4 x float> %x) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: [[INS2:%.*]] = shufflevector <4 x float> [[X:%.*]], <4 x float> <float poison, float 1.000000e+00, float 2.000000e+00, float poison>, <4 x i32> <i32 0, i32 5, i32 6, i32 3>
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; CHECK-NEXT: ret <4 x float> [[INS2]]
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;
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%ins1 = insertelement<4 x float> %x, float 1.0, i32 1
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%ins2 = insertelement<4 x float> %ins1, float 2.0, i32 2
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ret <4 x float> %ins2
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}
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; Insert of a constant is canonicalized ahead of insert of a variable.
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define <4 x float> @bar(<4 x float> %x, float %a) {
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; CHECK-LABEL: @bar(
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; CHECK-NEXT: [[TMP1:%.*]] = insertelement <4 x float> [[X:%.*]], float 2.000000e+00, i64 2
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; CHECK-NEXT: [[INS2:%.*]] = insertelement <4 x float> [[TMP1]], float [[A:%.*]], i64 1
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; CHECK-NEXT: ret <4 x float> [[INS2]]
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;
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%ins1 = insertelement<4 x float> %x, float %a, i32 1
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%ins2 = insertelement<4 x float> %ins1, float 2.0, i32 2
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ret <4 x float> %ins2
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}
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define <4 x float> @baz(<4 x float> %x, i32 %a) {
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; CHECK-LABEL: @baz(
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; CHECK-NEXT: [[INS1:%.*]] = insertelement <4 x float> [[X:%.*]], float 1.000000e+00, i64 1
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; CHECK-NEXT: [[INS2:%.*]] = insertelement <4 x float> [[INS1]], float 2.000000e+00, i32 [[A:%.*]]
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; CHECK-NEXT: ret <4 x float> [[INS2]]
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;
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%ins1 = insertelement<4 x float> %x, float 1.0, i32 1
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%ins2 = insertelement<4 x float> %ins1, float 2.0, i32 %a
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ret <4 x float> %ins2
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}
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; insertelements should fold to shuffle
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define <4 x float> @bazz(<4 x float> %x, i32 %a) {
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; CHECK-LABEL: @bazz(
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; CHECK-NEXT: [[INS1:%.*]] = insertelement <4 x float> [[X:%.*]], float 1.000000e+00, i64 3
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; CHECK-NEXT: [[INS2:%.*]] = insertelement <4 x float> [[INS1]], float 5.000000e+00, i32 [[A:%.*]]
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; CHECK-NEXT: [[INS5:%.*]] = shufflevector <4 x float> [[INS2]], <4 x float> <float poison, float 1.000000e+00, float 2.000000e+00, float poison>, <4 x i32> <i32 0, i32 5, i32 6, i32 3>
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; CHECK-NEXT: [[INS6:%.*]] = insertelement <4 x float> [[INS5]], float 7.000000e+00, i32 [[A]]
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; CHECK-NEXT: ret <4 x float> [[INS6]]
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;
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%ins1 = insertelement<4 x float> %x, float 1.0, i32 3
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%ins2 = insertelement<4 x float> %ins1, float 5.0, i32 %a
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%ins3 = insertelement<4 x float> %ins2, float 3.0, i32 2
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%ins4 = insertelement<4 x float> %ins3, float 1.0, i32 1
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%ins5 = insertelement<4 x float> %ins4, float 2.0, i32 2
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%ins6 = insertelement<4 x float> %ins5, float 7.0, i32 %a
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ret <4 x float> %ins6
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}
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; Out of bounds index folds to poison
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define <4 x float> @bazzz(<4 x float> %x) {
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; CHECK-LABEL: @bazzz(
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; CHECK-NEXT: ret <4 x float> <float poison, float poison, float 2.000000e+00, float poison>
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;
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%ins1 = insertelement<4 x float> %x, float 1.0, i32 5
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%ins2 = insertelement<4 x float> %ins1, float 2.0, i32 2
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ret <4 x float> %ins2
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}
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define <4 x float> @bazzzz(<4 x float> %x) {
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; CHECK-LABEL: @bazzzz(
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; CHECK-NEXT: ret <4 x float> <float poison, float poison, float 2.000000e+00, float poison>
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;
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%ins1 = insertelement<4 x float> %x, float 1.0, i32 undef
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%ins2 = insertelement<4 x float> %ins1, float 2.0, i32 2
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ret <4 x float> %ins2
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}
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define <4 x float> @bazzzzz() {
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; CHECK-LABEL: @bazzzzz(
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; CHECK-NEXT: ret <4 x float> <float 1.000000e+00, float 5.000000e+00, float 1.000000e+01, float 4.000000e+00>
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;
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%ins1 = insertelement <4 x float> insertelement (<4 x float> <float 1.0, float 2.0, float 3.0, float undef>, float 4.0, i32 3), float 5.0, i32 1
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%ins2 = insertelement<4 x float> %ins1, float 10.0, i32 2
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ret <4 x float> %ins2
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}
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define <4 x float> @bazzzzzz(<4 x float> %x, i32 %a) {
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; CHECK-LABEL: @bazzzzzz(
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; CHECK-NEXT: ret <4 x float> <float undef, float 5.000000e+00, float undef, float 4.000000e+00>
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;
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%ins1 = insertelement <4 x float> insertelement (<4 x float> shufflevector (<4 x float> undef, <4 x float> <float 1.0, float 2.0, float 3.0, float 4.0> , <4 x i32> <i32 0, i32 5, i32 undef, i32 6> ), float 4.0, i32 3), float 5.0, i32 1
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ret <4 x float> %ins1
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}
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