1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2 ; RUN: opt < %s -basicaa -newgvn -S | FileCheck %s 3 4 define i32 @main(i32** %p, i32 %x, i32 %y) { 5 ; CHECK-LABEL: @main( 6 ; CHECK-NEXT: block1: 7 ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X:%.*]], [[Y:%.*]] 8 ; CHECK-NEXT: br i1 [[CMP]], label [[BLOCK2:%.*]], label [[BLOCK3:%.*]] 9 ; CHECK: block2: 10 ; CHECK-NEXT: [[A:%.*]] = load i32*, i32** [[P:%.*]] 11 ; CHECK-NEXT: br label [[BLOCK4:%.*]] 12 ; CHECK: block3: 13 ; CHECK-NEXT: [[B:%.*]] = load i32*, i32** [[P]] 14 ; CHECK-NEXT: br label [[BLOCK4]] 15 ; CHECK: block4: 16 ; CHECK-NEXT: [[EXISTINGPHI:%.*]] = phi i32* [ [[A]], [[BLOCK2]] ], [ [[B]], [[BLOCK3]] ] 17 ; CHECK-NEXT: [[C:%.*]] = load i32, i32* [[EXISTINGPHI]] 18 ; CHECK-NEXT: [[E:%.*]] = add i32 [[C]], [[C]] 19 ; CHECK-NEXT: ret i32 [[E]] 20 ; 21 block1: 22 %cmp = icmp eq i32 %x, %y 23 br i1 %cmp , label %block2, label %block3 24 25 block2: 26 %a = load i32*, i32** %p 27 br label %block4 28 29 block3: 30 %b = load i32*, i32** %p 31 br label %block4 32 33 block4: 34 %existingPHI = phi i32* [ %a, %block2 ], [ %b, %block3 ] 35 %DEAD = load i32*, i32** %p 36 %c = load i32, i32* %DEAD 37 %d = load i32, i32* %existingPHI 38 %e = add i32 %c, %d 39 ret i32 %e 40 } 41
