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0cd81d8a10
Adding some test-cases demonstrating cases that need to be improved. To be followed by patches that improve these cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299189 91177308-0d34-0410-b5e6-96231b3b80d8
72 lines
3.2 KiB
LLVM
72 lines
3.2 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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define <4 x i32> @splat_operand(<4 x i32> %x) {
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; CHECK-LABEL: @splat_operand(
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; CHECK-NEXT: [[SPLAT:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> undef, <4 x i32> zeroinitializer
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; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[SPLAT]], <4 x i32> undef, <4 x i32> <i32 0, i32 3, i32 2, i32 1>
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; CHECK-NEXT: ret <4 x i32> [[SHUF]]
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;
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%splat = shufflevector <4 x i32> %x, <4 x i32> undef, <4 x i32> zeroinitializer
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%shuf = shufflevector <4 x i32> %splat, <4 x i32> undef, <4 x i32> <i32 0, i32 3, i32 2, i32 1>
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ret <4 x i32> %shuf
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}
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define <4 x i32> @undef_mask(<4 x i32> %x) {
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; CHECK-LABEL: @undef_mask(
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; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> undef, <4 x i32> undef
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; CHECK-NEXT: ret <4 x i32> [[SHUF]]
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;
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%shuf = shufflevector <4 x i32> %x, <4 x i32> undef, <4 x i32> undef
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ret <4 x i32> %shuf
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}
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define <4 x i32> @identity_mask_0(<4 x i32> %x) {
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; CHECK-LABEL: @identity_mask_0(
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; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
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; CHECK-NEXT: ret <4 x i32> [[SHUF]]
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;
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%shuf = shufflevector <4 x i32> %x, <4 x i32> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
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ret <4 x i32> %shuf
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}
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define <4 x i32> @identity_mask_1(<4 x i32> %x) {
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; CHECK-LABEL: @identity_mask_1(
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; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> undef, <4 x i32> [[X:%.*]], <4 x i32> <i32 4, i32 5, i32 6, i32 7>
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; CHECK-NEXT: ret <4 x i32> [[SHUF]]
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;
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%shuf = shufflevector <4 x i32> undef, <4 x i32> %x, <4 x i32> <i32 4, i32 5, i32 6, i32 7>
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ret <4 x i32> %shuf
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}
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define <4 x i32> @pseudo_identity_mask(<4 x i32> %x) {
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; CHECK-LABEL: @pseudo_identity_mask(
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; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> [[X]], <4 x i32> <i32 0, i32 1, i32 2, i32 7>
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; CHECK-NEXT: ret <4 x i32> [[SHUF]]
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;
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%shuf = shufflevector <4 x i32> %x, <4 x i32> %x, <4 x i32> <i32 0, i32 1, i32 2, i32 7>
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ret <4 x i32> %shuf
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}
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define <4 x i32> @const_operand(<4 x i32> %x) {
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; CHECK-LABEL: @const_operand(
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; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> <i32 42, i32 43, i32 44, i32 45>, <4 x i32> [[X:%.*]], <4 x i32> <i32 0, i32 3, i32 2, i32 1>
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; CHECK-NEXT: ret <4 x i32> [[SHUF]]
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;
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%shuf = shufflevector <4 x i32> <i32 42, i32 43, i32 44, i32 45>, <4 x i32> %x, <4 x i32> <i32 0, i32 3, i32 2, i32 1>
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ret <4 x i32> %shuf
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}
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define <4 x i32> @merge(<4 x i32> %x) {
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; CHECK-LABEL: @merge(
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; CHECK-NEXT: [[LOWER:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> undef, <2 x i32> <i32 1, i32 0>
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; CHECK-NEXT: [[UPPER:%.*]] = shufflevector <4 x i32> [[X]], <4 x i32> undef, <2 x i32> <i32 2, i32 3>
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; CHECK-NEXT: [[MERGED:%.*]] = shufflevector <2 x i32> [[UPPER]], <2 x i32> [[LOWER]], <4 x i32> <i32 3, i32 2, i32 0, i32 1>
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; CHECK-NEXT: ret <4 x i32> [[MERGED]]
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;
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%lower = shufflevector <4 x i32> %x, <4 x i32> undef, <2 x i32> <i32 1, i32 0>
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%upper = shufflevector <4 x i32> %x, <4 x i32> undef, <2 x i32> <i32 2, i32 3>
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%merged = shufflevector <2 x i32> %upper, <2 x i32> %lower, <4 x i32> <i32 3, i32 2, i32 0, i32 1>
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ret <4 x i32> %merged
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}
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