1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -S -instcombine < %s | FileCheck %s --check-prefixes=CHECK,LITTLE 3; RUN: opt -S -instcombine -data-layout="E" < %s | FileCheck %s --check-prefixes=CHECK,BIG 4 5define i8 @load_smaller_int(i16* %p) { 6; LITTLE-LABEL: @load_smaller_int( 7; LITTLE-NEXT: store i16 258, i16* [[P:%.*]], align 2 8; LITTLE-NEXT: ret i8 2 9; 10; BIG-LABEL: @load_smaller_int( 11; BIG-NEXT: store i16 258, i16* [[P:%.*]], align 2 12; BIG-NEXT: ret i8 1 13; 14 store i16 258, i16* %p 15 %p2 = bitcast i16* %p to i8* 16 %load = load i8, i8* %p2 17 ret i8 %load 18} 19 20; This case can *not* be forwarded, as we only see part of the stored value. 21define i32 @load_larger_int(i16* %p) { 22; CHECK-LABEL: @load_larger_int( 23; CHECK-NEXT: store i16 258, i16* [[P:%.*]], align 2 24; CHECK-NEXT: [[P2:%.*]] = bitcast i16* [[P]] to i32* 25; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[P2]], align 4 26; CHECK-NEXT: ret i32 [[LOAD]] 27; 28 store i16 258, i16* %p 29 %p2 = bitcast i16* %p to i32* 30 %load = load i32, i32* %p2 31 ret i32 %load 32} 33 34define i32 @vec_store_load_first(i32* %p) { 35; CHECK-LABEL: @vec_store_load_first( 36; CHECK-NEXT: [[P2:%.*]] = bitcast i32* [[P:%.*]] to <2 x i32>* 37; CHECK-NEXT: store <2 x i32> <i32 1, i32 2>, <2 x i32>* [[P2]], align 8 38; CHECK-NEXT: ret i32 1 39; 40 %p2 = bitcast i32* %p to <2 x i32>* 41 store <2 x i32> <i32 1, i32 2>, <2 x i32>* %p2 42 %load = load i32, i32* %p 43 ret i32 %load 44} 45 46define i17 @vec_store_load_first_odd_size(i17* %p) { 47; CHECK-LABEL: @vec_store_load_first_odd_size( 48; CHECK-NEXT: [[P2:%.*]] = bitcast i17* [[P:%.*]] to <2 x i17>* 49; CHECK-NEXT: store <2 x i17> <i17 1, i17 2>, <2 x i17>* [[P2]], align 8 50; CHECK-NEXT: [[LOAD:%.*]] = load i17, i17* [[P]], align 4 51; CHECK-NEXT: ret i17 [[LOAD]] 52; 53 %p2 = bitcast i17* %p to <2 x i17>* 54 store <2 x i17> <i17 1, i17 2>, <2 x i17>* %p2 55 %load = load i17, i17* %p 56 ret i17 %load 57} 58 59define i32 @vec_store_load_first_constexpr(i32* %p) { 60; CHECK-LABEL: @vec_store_load_first_constexpr( 61; CHECK-NEXT: [[P2:%.*]] = bitcast i32* [[P:%.*]] to <2 x i32>* 62; CHECK-NEXT: store <2 x i32> bitcast (i64 ptrtoint (i32 (i32*)* @vec_store_load_first to i64) to <2 x i32>), <2 x i32>* [[P2]], align 8 63; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[P]], align 4 64; CHECK-NEXT: ret i32 [[LOAD]] 65; 66 %p2 = bitcast i32* %p to <2 x i32>* 67 store <2 x i32> bitcast (i64 ptrtoint (i32 (i32*)* @vec_store_load_first to i64) to <2 x i32>), <2 x i32>* %p2, align 8 68 %load = load i32, i32* %p, align 4 69 ret i32 %load 70} 71 72define i32 @vec_store_load_second(i32* %p) { 73; CHECK-LABEL: @vec_store_load_second( 74; CHECK-NEXT: [[P2:%.*]] = bitcast i32* [[P:%.*]] to <2 x i32>* 75; CHECK-NEXT: store <2 x i32> <i32 1, i32 2>, <2 x i32>* [[P2]], align 8 76; CHECK-NEXT: [[P3:%.*]] = getelementptr i32, i32* [[P]], i64 1 77; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[P3]], align 4 78; CHECK-NEXT: ret i32 [[LOAD]] 79; 80 %p2 = bitcast i32* %p to <2 x i32>* 81 store <2 x i32> <i32 1, i32 2>, <2 x i32>* %p2 82 %p3 = getelementptr i32, i32* %p, i64 1 83 %load = load i32, i32* %p3 84 ret i32 %load 85} 86 87define i64 @vec_store_load_whole(i32* %p) { 88; LITTLE-LABEL: @vec_store_load_whole( 89; LITTLE-NEXT: [[P2:%.*]] = bitcast i32* [[P:%.*]] to <2 x i32>* 90; LITTLE-NEXT: store <2 x i32> <i32 1, i32 2>, <2 x i32>* [[P2]], align 8 91; LITTLE-NEXT: ret i64 8589934593 92; 93; BIG-LABEL: @vec_store_load_whole( 94; BIG-NEXT: [[P2:%.*]] = bitcast i32* [[P:%.*]] to <2 x i32>* 95; BIG-NEXT: store <2 x i32> <i32 1, i32 2>, <2 x i32>* [[P2]], align 8 96; BIG-NEXT: ret i64 4294967298 97; 98 %p2 = bitcast i32* %p to <2 x i32>* 99 store <2 x i32> <i32 1, i32 2>, <2 x i32>* %p2 100 %p3 = bitcast i32* %p to i64* 101 %load = load i64, i64* %p3 102 ret i64 %load 103} 104 105define i32 @vec_store_load_overlap(i32* %p) { 106; CHECK-LABEL: @vec_store_load_overlap( 107; CHECK-NEXT: [[P2:%.*]] = bitcast i32* [[P:%.*]] to <2 x i32>* 108; CHECK-NEXT: store <2 x i32> <i32 1, i32 2>, <2 x i32>* [[P2]], align 8 109; CHECK-NEXT: [[P3:%.*]] = bitcast i32* [[P]] to i8* 110; CHECK-NEXT: [[P4:%.*]] = getelementptr i8, i8* [[P3]], i64 2 111; CHECK-NEXT: [[P5:%.*]] = bitcast i8* [[P4]] to i32* 112; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[P5]], align 2 113; CHECK-NEXT: ret i32 [[LOAD]] 114; 115 %p2 = bitcast i32* %p to <2 x i32>* 116 store <2 x i32> <i32 1, i32 2>, <2 x i32>* %p2 117 %p3 = bitcast i32* %p to i8* 118 %p4 = getelementptr i8, i8* %p3, i64 2 119 %p5 = bitcast i8* %p4 to i32* 120 %load = load i32, i32* %p5, align 2 121 ret i32 %load 122} 123