90 lines
3.8 KiB
LLVM
90 lines
3.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -aggressive-instcombine -S | FileCheck %s
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define <4 x i16> @shuffle(<2 x i8> %a, <2 x i8> %b) {
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; CHECK-LABEL: @shuffle(
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; CHECK-NEXT: [[ZEXTA:%.*]] = zext <2 x i8> [[A:%.*]] to <2 x i32>
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; CHECK-NEXT: [[ZEXTB:%.*]] = zext <2 x i8> [[B:%.*]] to <2 x i32>
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; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <2 x i32> [[ZEXTA]], <2 x i32> [[ZEXTB]], <4 x i32> <i32 3, i32 2, i32 1, i32 0>
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; CHECK-NEXT: [[TRUNC:%.*]] = trunc <4 x i32> [[SHUF]] to <4 x i16>
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; CHECK-NEXT: ret <4 x i16> [[TRUNC]]
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;
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%zexta = zext <2 x i8> %a to <2 x i32>
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%zextb = zext <2 x i8> %b to <2 x i32>
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%shuf = shufflevector <2 x i32> %zexta, <2 x i32> %zextb, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
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%trunc = trunc <4 x i32> %shuf to <4 x i16>
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ret <4 x i16> %trunc
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}
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define <2 x i16> @unary_shuffle(<2 x i8> %a) {
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; CHECK-LABEL: @unary_shuffle(
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; CHECK-NEXT: [[ZEXTA:%.*]] = zext <2 x i8> [[A:%.*]] to <2 x i32>
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; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <2 x i32> [[ZEXTA]], <2 x i32> undef, <2 x i32> <i32 1, i32 0>
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; CHECK-NEXT: [[TRUNC:%.*]] = trunc <2 x i32> [[SHUF]] to <2 x i16>
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; CHECK-NEXT: ret <2 x i16> [[TRUNC]]
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;
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%zexta = zext <2 x i8> %a to <2 x i32>
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%shuf = shufflevector <2 x i32> %zexta, <2 x i32> undef, <2 x i32> <i32 1, i32 0>
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%trunc = trunc <2 x i32> %shuf to <2 x i16>
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ret <2 x i16> %trunc
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}
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define <4 x i16> @const_shuffle() {
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; CHECK-LABEL: @const_shuffle(
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; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <2 x i32> <i32 1, i32 2>, <2 x i32> <i32 3, i32 7>, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
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; CHECK-NEXT: [[TRUNC:%.*]] = trunc <4 x i32> [[SHUF]] to <4 x i16>
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; CHECK-NEXT: ret <4 x i16> [[TRUNC]]
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;
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%shuf = shufflevector <2 x i32> <i32 1, i32 2>, <2 x i32> <i32 3, i32 7>, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
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%trunc = trunc <4 x i32> %shuf to <4 x i16>
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ret <4 x i16> %trunc
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}
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define <2 x i16> @extract_insert(<2 x i8> %a, <2 x i8> %b) {
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; CHECK-LABEL: @extract_insert(
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; CHECK-NEXT: [[ZEXTA:%.*]] = zext <2 x i8> [[A:%.*]] to <2 x i16>
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; CHECK-NEXT: [[ZEXTB:%.*]] = zext <2 x i8> [[B:%.*]] to <2 x i16>
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; CHECK-NEXT: [[EXTR:%.*]] = extractelement <2 x i16> [[ZEXTA]], i32 0
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; CHECK-NEXT: [[INSR:%.*]] = insertelement <2 x i16> [[ZEXTB]], i16 [[EXTR]], i32 1
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; CHECK-NEXT: ret <2 x i16> [[INSR]]
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;
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%zexta = zext <2 x i8> %a to <2 x i32>
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%zextb = zext <2 x i8> %b to <2 x i32>
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%extr = extractelement <2 x i32> %zexta, i32 0
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%insr = insertelement <2 x i32> %zextb, i32 %extr, i32 1
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%trunc = trunc <2 x i32> %insr to <2 x i16>
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ret <2 x i16> %trunc
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}
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define <2 x i16> @insert_poison(i8 %a) {
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; CHECK-LABEL: @insert_poison(
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; CHECK-NEXT: [[ZEXTA:%.*]] = zext i8 [[A:%.*]] to i16
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; CHECK-NEXT: [[INSR:%.*]] = insertelement <2 x i16> poison, i16 [[ZEXTA]], i32 0
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; CHECK-NEXT: ret <2 x i16> [[INSR]]
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;
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%zexta = zext i8 %a to i32
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%insr = insertelement <2 x i32> poison, i32 %zexta, i32 0
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%trunc = trunc <2 x i32> %insr to <2 x i16>
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ret <2 x i16> %trunc
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}
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; This demonstrates test not folded by 'opt -instcombine'
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define <2 x i16> @extract_mul_insert(<2 x i8> %x) {
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; CHECK-LABEL: @extract_mul_insert(
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; CHECK-NEXT: [[ZEXT:%.*]] = zext <2 x i8> [[X:%.*]] to <2 x i16>
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; CHECK-NEXT: [[LSHR:%.*]] = lshr <2 x i16> [[ZEXT]], <i16 4, i16 5>
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; CHECK-NEXT: [[EXTR:%.*]] = extractelement <2 x i16> [[LSHR]], i32 1
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; CHECK-NEXT: [[MUL:%.*]] = mul i16 [[EXTR]], 5
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; CHECK-NEXT: [[INSR:%.*]] = insertelement <2 x i16> [[LSHR]], i16 [[MUL]], i32 1
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; CHECK-NEXT: ret <2 x i16> [[INSR]]
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;
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%zext = zext <2 x i8> %x to <2 x i32>
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%lshr = lshr <2 x i32> %zext, <i32 4, i32 5>
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%extr = extractelement <2 x i32> %lshr, i32 1
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%mul = mul i32 %extr, 5
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%insr = insertelement <2 x i32> %lshr, i32 %mul, i32 1
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%trunc = trunc <2 x i32> %insr to <2 x i16>
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ret <2 x i16> %trunc
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}
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