3d3c0ed932
We already have a fold for variable index with constant vector, but if we can determine a scalar splat value, then it does not matter whether that value is constant or not. We overlooked this fold in D102404 and earlier patches, but the fixed vector variant is shown in: https://llvm.org/PR50817 Alive2 agrees on that: https://alive2.llvm.org/ce/z/HpijPC The same logic applies to scalable vectors. Differential Revision: https://reviews.llvm.org/D104867
72 lines
2.0 KiB
LLVM
72 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instsimplify -S | FileCheck %s
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; Weird Types
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define i129 @vec_extract_negidx(<3 x i129> %a) {
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; CHECK-LABEL: @vec_extract_negidx(
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; CHECK-NEXT: ret i129 poison
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;
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%E1 = extractelement <3 x i129> %a, i129 -1
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ret i129 %E1
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}
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define i129 @vec_extract_out_of_bounds(<3 x i129> %a) {
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; CHECK-LABEL: @vec_extract_out_of_bounds(
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; CHECK-NEXT: ret i129 poison
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;
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%E1 = extractelement <3 x i129> %a, i129 3
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ret i129 %E1
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}
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define i129 @vec_extract_out_of_bounds2(<3 x i129> %a) {
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; CHECK-LABEL: @vec_extract_out_of_bounds2(
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; CHECK-NEXT: ret i129 poison
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;
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%E1 = extractelement <3 x i129> %a, i129 999999999999999
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ret i129 %E1
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}
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define i129 @vec_extract_undef_index(<3 x i129> %a) {
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; CHECK-LABEL: @vec_extract_undef_index(
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; CHECK-NEXT: ret i129 poison
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;
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%E1 = extractelement <3 x i129> %a, i129 undef
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ret i129 %E1
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}
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define i129 @vec_extract_poison_index(<3 x i129> %a) {
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; CHECK-LABEL: @vec_extract_poison_index(
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; CHECK-NEXT: ret i129 poison
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;
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%E1 = extractelement <3 x i129> %a, i129 poison
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ret i129 %E1
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}
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define i129 @vec_extract_in_bounds(<3 x i129> %a) {
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; CHECK-LABEL: @vec_extract_in_bounds(
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; CHECK-NEXT: [[E1:%.*]] = extractelement <3 x i129> [[A:%.*]], i129 2
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; CHECK-NEXT: ret i129 [[E1]]
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;
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%E1 = extractelement <3 x i129> %a, i129 2
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ret i129 %E1
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}
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define float @extract_element_splat_constant_vector_variable_index(i32 %y) {
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; CHECK-LABEL: @extract_element_splat_constant_vector_variable_index(
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; CHECK-NEXT: ret float 2.000000e+00
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;
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%r = extractelement <4 x float> <float 2.0, float 2.0, float 2.0, float 2.0>, i32 %y
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ret float %r
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}
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define i32 @extractelement_splat_variable_index(i32 %v, i32 %index) {
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; CHECK-LABEL: @extractelement_splat_variable_index(
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; CHECK-NEXT: ret i32 [[V:%.*]]
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;
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%in = insertelement <3 x i32> poison, i32 %v, i32 0
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%splat = shufflevector <3 x i32> %in, <3 x i32> poison, <3 x i32> zeroinitializer
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%r = extractelement <3 x i32> %splat, i32 %index
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ret i32 %r
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}
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