45 lines
2 KiB
LLVM
45 lines
2 KiB
LLVM
; RUN: opt -S -passes=instsimplify < %s | FileCheck %s
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; CHECK-LABEL: definitely_in_bounds
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; CHECK: ret i8 0
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define i8 @definitely_in_bounds() {
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ret i8 extractelement (<vscale x 16 x i8> zeroinitializer, i64 15)
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}
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; CHECK-LABEL: maybe_in_bounds
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; CHECK: ret i8 extractelement (<vscale x 16 x i8> zeroinitializer, i64 16)
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define i8 @maybe_in_bounds() {
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ret i8 extractelement (<vscale x 16 x i8> zeroinitializer, i64 16)
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}
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; Examples of extracting a lane from a splat constant
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define i32 @extractconstant_shuffle_in_range(i32 %v) {
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; CHECK-LABEL: @extractconstant_shuffle_in_range(
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; CHECK-NEXT: ret i32 1024
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;
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%in = insertelement <vscale x 4 x i32> undef, i32 1024, i32 0
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%splat = shufflevector <vscale x 4 x i32> %in, <vscale x 4 x i32> undef, <vscale x 4 x i32> zeroinitializer
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%r = extractelement <vscale x 4 x i32> %splat, i32 1
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ret i32 %r
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}
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define i32 @extractconstant_shuffle_maybe_out_of_range(i32 %v) {
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; CHECK-LABEL: @extractconstant_shuffle_maybe_out_of_range(
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; CHECK-NEXT: ret i32 extractelement (<vscale x 4 x i32> shufflevector (<vscale x 4 x i32> insertelement (<vscale x 4 x i32> undef, i32 1024, i32 0), <vscale x 4 x i32> undef, <vscale x 4 x i32> zeroinitializer), i32 4)
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;
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%in = insertelement <vscale x 4 x i32> undef, i32 1024, i32 0
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%splat = shufflevector <vscale x 4 x i32> %in, <vscale x 4 x i32> undef, <vscale x 4 x i32> zeroinitializer
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%r = extractelement <vscale x 4 x i32> %splat, i32 4
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ret i32 %r
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}
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define i32 @extractconstant_shuffle_invalid_index(i32 %v) {
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; CHECK-LABEL: @extractconstant_shuffle_invalid_index(
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; CHECK-NEXT: ret i32 extractelement (<vscale x 4 x i32> shufflevector (<vscale x 4 x i32> insertelement (<vscale x 4 x i32> undef, i32 1024, i32 0), <vscale x 4 x i32> undef, <vscale x 4 x i32> zeroinitializer), i32 -1)
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;
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%in = insertelement <vscale x 4 x i32> undef, i32 1024, i32 0
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%splat = shufflevector <vscale x 4 x i32> %in, <vscale x 4 x i32> undef, <vscale x 4 x i32> zeroinitializer
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%r = extractelement <vscale x 4 x i32> %splat, i32 -1
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ret i32 %r
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}
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