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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=newgvn -S | FileCheck %s3 4;; Most of these are borrowed from transforms/DSE/simple.ll5;; NewGVN should be able to eliminate any stores of the same value that are actually redundnat.6 7;; tmp5 is store of the same value to the same location as the load.8define void @test12(ptr %x) nounwind {9; CHECK-LABEL: @test12(10; CHECK-NEXT: [[TMP5:%.*]] = load i32, ptr [[X:%.*]], align 411; CHECK-NEXT: [[TMP7:%.*]] = getelementptr { i32, i32 }, ptr [[X]], i32 0, i32 112; CHECK-NEXT: [[TMP8:%.*]] = load i32, ptr [[TMP7]], align 413; CHECK-NEXT: [[TMP17:%.*]] = sub i32 0, [[TMP8]]14; CHECK-NEXT: store i32 [[TMP17]], ptr [[TMP7]], align 415; CHECK-NEXT: ret void16;17 %tmp4 = getelementptr { i32, i32 }, ptr %x, i32 0, i32 018 %tmp5 = load i32, ptr %tmp4, align 419 %tmp7 = getelementptr { i32, i32 }, ptr %x, i32 0, i32 120 %tmp8 = load i32, ptr %tmp7, align 421 %tmp17 = sub i32 0, %tmp822 store i32 %tmp5, ptr %tmp4, align 423 store i32 %tmp17, ptr %tmp7, align 424 ret void25}26; Remove redundant store if loaded value is in another block.27define i32 @test26(i1 %c, ptr %p) {28; CHECK-LABEL: @test26(29; CHECK-NEXT: entry:30; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[P:%.*]], align 431; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]32; CHECK: bb1:33; CHECK-NEXT: br label [[BB3:%.*]]34; CHECK: bb2:35; CHECK-NEXT: br label [[BB3]]36; CHECK: bb3:37; CHECK-NEXT: ret i32 038;39entry:40 %v = load i32, ptr %p, align 441 br i1 %c, label %bb1, label %bb242bb1:43 br label %bb344bb2:45 store i32 %v, ptr %p, align 446 br label %bb347bb3:48 ret i32 049}50 51declare void @unknown_func()52; Remove redundant store, which is in the same loop as the load.53define i32 @test33(i1 %c, ptr %p, i32 %i, i1 %arg) {54; CHECK-LABEL: @test33(55; CHECK-NEXT: entry:56; CHECK-NEXT: br label [[BB1:%.*]]57; CHECK: bb1:58; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[P:%.*]], align 459; CHECK-NEXT: br label [[BB2:%.*]]60; CHECK: bb2:61; CHECK-NEXT: call void @unknown_func()62; CHECK-NEXT: br i1 [[ARG:%.*]], label [[BB1]], label [[BB3:%.*]]63; CHECK: bb3:64; CHECK-NEXT: ret i32 065;66entry:67 br label %bb168bb1:69 %v = load i32, ptr %p, align 470 br label %bb271bb2:72 store i32 %v, ptr %p, align 473 ; Might read and overwrite value at %p, but doesn't matter.74 call void @unknown_func()75 br i1 %arg, label %bb1, label %bb376bb3:77 ret i32 078}79