1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=aggressive-instcombine -S | FileCheck %s 3 4define <4 x i16> @shuffle(<2 x i8> %a, <2 x i8> %b) { 5; CHECK-LABEL: @shuffle( 6; CHECK-NEXT: [[ZEXTA:%.*]] = zext <2 x i8> [[A:%.*]] to <2 x i32> 7; CHECK-NEXT: [[ZEXTB:%.*]] = zext <2 x i8> [[B:%.*]] to <2 x i32> 8; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <2 x i32> [[ZEXTA]], <2 x i32> [[ZEXTB]], <4 x i32> <i32 3, i32 2, i32 1, i32 0> 9; CHECK-NEXT: [[TRUNC:%.*]] = trunc <4 x i32> [[SHUF]] to <4 x i16> 10; CHECK-NEXT: ret <4 x i16> [[TRUNC]] 11; 12 %zexta = zext <2 x i8> %a to <2 x i32> 13 %zextb = zext <2 x i8> %b to <2 x i32> 14 %shuf = shufflevector <2 x i32> %zexta, <2 x i32> %zextb, <4 x i32> <i32 3, i32 2, i32 1, i32 0> 15 %trunc = trunc <4 x i32> %shuf to <4 x i16> 16 ret <4 x i16> %trunc 17} 18 19define <2 x i16> @unary_shuffle(<2 x i8> %a) { 20; CHECK-LABEL: @unary_shuffle( 21; CHECK-NEXT: [[ZEXTA:%.*]] = zext <2 x i8> [[A:%.*]] to <2 x i32> 22; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <2 x i32> [[ZEXTA]], <2 x i32> poison, <2 x i32> <i32 1, i32 0> 23; CHECK-NEXT: [[TRUNC:%.*]] = trunc <2 x i32> [[SHUF]] to <2 x i16> 24; CHECK-NEXT: ret <2 x i16> [[TRUNC]] 25; 26 %zexta = zext <2 x i8> %a to <2 x i32> 27 %shuf = shufflevector <2 x i32> %zexta, <2 x i32> poison, <2 x i32> <i32 1, i32 0> 28 %trunc = trunc <2 x i32> %shuf to <2 x i16> 29 ret <2 x i16> %trunc 30} 31 32define <4 x i16> @const_shuffle() { 33; CHECK-LABEL: @const_shuffle( 34; 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> 35; CHECK-NEXT: [[TRUNC:%.*]] = trunc <4 x i32> [[SHUF]] to <4 x i16> 36; CHECK-NEXT: ret <4 x i16> [[TRUNC]] 37; 38 %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> 39 %trunc = trunc <4 x i32> %shuf to <4 x i16> 40 ret <4 x i16> %trunc 41} 42 43 44define <2 x i16> @extract_insert(<2 x i8> %a, <2 x i8> %b) { 45; CHECK-LABEL: @extract_insert( 46; CHECK-NEXT: [[ZEXTA:%.*]] = zext <2 x i8> [[A:%.*]] to <2 x i16> 47; CHECK-NEXT: [[ZEXTB:%.*]] = zext <2 x i8> [[B:%.*]] to <2 x i16> 48; CHECK-NEXT: [[EXTR:%.*]] = extractelement <2 x i16> [[ZEXTA]], i32 0 49; CHECK-NEXT: [[INSR:%.*]] = insertelement <2 x i16> [[ZEXTB]], i16 [[EXTR]], i32 1 50; CHECK-NEXT: ret <2 x i16> [[INSR]] 51; 52 %zexta = zext <2 x i8> %a to <2 x i32> 53 %zextb = zext <2 x i8> %b to <2 x i32> 54 %extr = extractelement <2 x i32> %zexta, i32 0 55 %insr = insertelement <2 x i32> %zextb, i32 %extr, i32 1 56 %trunc = trunc <2 x i32> %insr to <2 x i16> 57 ret <2 x i16> %trunc 58} 59 60define <2 x i16> @insert_poison(i8 %a) { 61; CHECK-LABEL: @insert_poison( 62; CHECK-NEXT: [[ZEXTA:%.*]] = zext i8 [[A:%.*]] to i16 63; CHECK-NEXT: [[INSR:%.*]] = insertelement <2 x i16> poison, i16 [[ZEXTA]], i32 0 64; CHECK-NEXT: ret <2 x i16> [[INSR]] 65; 66 %zexta = zext i8 %a to i32 67 %insr = insertelement <2 x i32> poison, i32 %zexta, i32 0 68 %trunc = trunc <2 x i32> %insr to <2 x i16> 69 ret <2 x i16> %trunc 70} 71 72; This demonstrates test not folded by 'opt -instcombine' 73define <2 x i16> @extract_mul_insert(<2 x i8> %x) { 74; CHECK-LABEL: @extract_mul_insert( 75; CHECK-NEXT: [[ZEXT:%.*]] = zext <2 x i8> [[X:%.*]] to <2 x i16> 76; CHECK-NEXT: [[LSHR:%.*]] = lshr <2 x i16> [[ZEXT]], <i16 4, i16 5> 77; CHECK-NEXT: [[EXTR:%.*]] = extractelement <2 x i16> [[LSHR]], i32 1 78; CHECK-NEXT: [[MUL:%.*]] = mul i16 [[EXTR]], 5 79; CHECK-NEXT: [[INSR:%.*]] = insertelement <2 x i16> [[LSHR]], i16 [[MUL]], i32 1 80; CHECK-NEXT: ret <2 x i16> [[INSR]] 81; 82 %zext = zext <2 x i8> %x to <2 x i32> 83 %lshr = lshr <2 x i32> %zext, <i32 4, i32 5> 84 %extr = extractelement <2 x i32> %lshr, i32 1 85 %mul = mul i32 %extr, 5 86 %insr = insertelement <2 x i32> %lshr, i32 %mul, i32 1 87 %trunc = trunc <2 x i32> %insr to <2 x i16> 88 ret <2 x i16> %trunc 89} 90