derek.holloway
7502bf64a4
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62 lines
2.3 KiB
LLVM
62 lines
2.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes=instcombine -S < %s | FileCheck %s
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; Case 1: Vector to Vector bitcast
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define <4 x i2> @test_vector_to_vector(<1 x i8> %a0, <1 x i8> %a1) {
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; CHECK-LABEL: define <4 x i2> @test_vector_to_vector(
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; CHECK-SAME: <1 x i8> [[A0:%.*]], <1 x i8> [[A1:%.*]]) {
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt <1 x i8> [[A0]], [[A1]]
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; CHECK-NEXT: [[EXT:%.*]] = sext <1 x i1> [[CMP]] to <1 x i8>
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; CHECK-NEXT: [[SUB:%.*]] = bitcast <1 x i8> [[EXT]] to <4 x i2>
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; CHECK-NEXT: ret <4 x i2> [[SUB]]
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;
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%cmp = icmp sgt <1 x i8> %a0, %a1
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%ext = sext <1 x i1> %cmp to <1 x i8>
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%sub = bitcast <1 x i8> %ext to <4 x i2>
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%sra = ashr <4 x i2> %sub, <i2 1, i2 1, i2 1, i2 1>
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ret <4 x i2> %sra
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}
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; Case 2: Scalar to Vector bitcast
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define <2 x i16> @test_scalar_to_vector(i1 %cond) {
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; CHECK-LABEL: define <2 x i16> @test_scalar_to_vector(
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; CHECK-SAME: i1 [[COND:%.*]]) {
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; CHECK-NEXT: [[EXT:%.*]] = sext i1 [[COND]] to i32
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; CHECK-NEXT: [[BC:%.*]] = bitcast i32 [[EXT]] to <2 x i16>
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; CHECK-NEXT: ret <2 x i16> [[BC]]
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;
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%ext = sext i1 %cond to i32
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%bc = bitcast i32 %ext to <2 x i16>
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%sra = ashr <2 x i16> %bc, <i16 8, i16 8>
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ret <2 x i16> %sra
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}
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; Case 3: Multiple right shifts
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define <8 x i8> @test_multiple_shifts(i1 %cond) {
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; CHECK-LABEL: define <8 x i8> @test_multiple_shifts(
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; CHECK-SAME: i1 [[COND:%.*]]) {
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; CHECK-NEXT: [[EXT:%.*]] = sext i1 [[COND]] to i64
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; CHECK-NEXT: [[BC:%.*]] = bitcast i64 [[EXT]] to <8 x i8>
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; CHECK-NEXT: ret <8 x i8> [[BC]]
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;
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%ext = sext i1 %cond to i64
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%bc = bitcast i64 %ext to <8 x i8>
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%sra1 = ashr <8 x i8> %bc, <i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 1>
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%sra2 = ashr <8 x i8> %sra1, <i8 2, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1>
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ret <8 x i8> %sra2
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}
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; (Negative) Case 4: Test with non-sign-extended source
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define <4 x i8> @test_non_sign_extended(i32 %val) {
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; CHECK-LABEL: define <4 x i8> @test_non_sign_extended(
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; CHECK-SAME: i32 [[VAL:%.*]]) {
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; CHECK-NEXT: [[BC:%.*]] = bitcast i32 [[VAL]] to <4 x i8>
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; CHECK-NEXT: [[SRA:%.*]] = ashr <4 x i8> [[BC]], splat (i8 1)
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; CHECK-NEXT: ret <4 x i8> [[SRA]]
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;
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%bc = bitcast i32 %val to <4 x i8>
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%sra = ashr <4 x i8> %bc, <i8 1, i8 1, i8 1, i8 1>
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ret <4 x i8> %sra
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}
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