1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=dse -enable-dse-partial-store-merging=false -S | FileCheck %s 3target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128" 4 5; Ensure that the dead store is deleted in this case. It is wholely 6; overwritten by the second store. 7define void @test1(ptr %V) { 8; CHECK-LABEL: @test1( 9; CHECK-NEXT: store i32 1234567, ptr [[V:%.*]], align 4 10; CHECK-NEXT: ret void 11; 12 store i8 0, ptr %V 13 store i32 1234567, ptr %V 14 ret void 15} 16 17; Note that we could do better by merging the two stores into one. 18define void @test2(ptr %P) { 19; CHECK-LABEL: @test2( 20; CHECK-NEXT: store i32 0, ptr [[P:%.*]], align 4 21; CHECK-NEXT: store i16 1, ptr [[P]], align 2 22; CHECK-NEXT: ret void 23; 24 store i32 0, ptr %P 25 store i16 1, ptr %P 26 ret void 27} 28 29 30define i32 @test3(double %__x) { 31; CHECK-LABEL: @test3( 32; CHECK-NEXT: [[__U:%.*]] = alloca { [3 x i32] }, align 4 33; CHECK-NEXT: store double [[__X:%.*]], ptr [[__U]], align 8 34; CHECK-NEXT: [[TMP_4:%.*]] = getelementptr { [3 x i32] }, ptr [[__U]], i32 0, i32 0, i32 1 35; CHECK-NEXT: [[TMP_5:%.*]] = load i32, ptr [[TMP_4]], align 4 36; CHECK-NEXT: [[TMP_6:%.*]] = icmp slt i32 [[TMP_5]], 0 37; CHECK-NEXT: [[TMP_7:%.*]] = zext i1 [[TMP_6]] to i32 38; CHECK-NEXT: ret i32 [[TMP_7]] 39; 40 %__u = alloca { [3 x i32] } 41 store double %__x, ptr %__u 42 %tmp.4 = getelementptr { [3 x i32] }, ptr %__u, i32 0, i32 0, i32 1 43 %tmp.5 = load i32, ptr %tmp.4 44 %tmp.6 = icmp slt i32 %tmp.5, 0 45 %tmp.7 = zext i1 %tmp.6 to i32 46 ret i32 %tmp.7 47} 48 49; PR6043 50define void @test4(ptr %P) { 51; CHECK-LABEL: @test4( 52; CHECK-NEXT: store double 0.000000e+00, ptr [[P:%.*]], align 8 53; CHECK-NEXT: ret void 54; 55 56 store i8 19, ptr %P ;; dead 57 %A = getelementptr i8, ptr %P, i32 3 58 59 store i8 42, ptr %A ;; dead 60 61 store double 0.0, ptr %P 62 ret void 63} 64 65; PR8657 66declare void @test5a(ptr) 67define void @test5(i32 %i) nounwind ssp { 68; CHECK-LABEL: @test5( 69; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4 70; CHECK-NEXT: store i32 20, ptr [[A]], align 4 71; CHECK-NEXT: call void @test5a(ptr [[A]]) 72; CHECK-NEXT: ret void 73; 74 %A = alloca i32 75 %C = getelementptr i8, ptr %A, i32 %i 76 store i8 10, ptr %C ;; Dead store to variable index. 77 store i32 20, ptr %A 78 79 call void @test5a(ptr %A) 80 ret void 81} 82 83declare void @test5a_as1(ptr) 84define void @test5_addrspacecast(i32 %i) nounwind ssp { 85; CHECK-LABEL: @test5_addrspacecast( 86; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4 87; CHECK-NEXT: store i32 20, ptr [[A]], align 4 88; CHECK-NEXT: call void @test5a(ptr [[A]]) 89; CHECK-NEXT: ret void 90; 91 %A = alloca i32 92 %B = addrspacecast ptr %A to ptr addrspace(1) 93 %C = getelementptr i8, ptr addrspace(1) %B, i32 %i 94 store i8 10, ptr addrspace(1) %C ;; Dead store to variable index. 95 store i32 20, ptr %A 96 97 call void @test5a(ptr %A) 98 ret void 99} 100