1; RUN: opt < %s -basicaa -gvn -S | FileCheck %s 2 3define i32 @main(i32** %p, i32 %x, i32 %y) { 4block1: 5 %cmp = icmp eq i32 %x, %y 6 br i1 %cmp , label %block2, label %block3 7 8block2: 9 %a = load i32*, i32** %p 10 br label %block4 11 12block3: 13 %b = load i32*, i32** %p 14 br label %block4 15 16block4: 17; CHECK-NOT: %existingPHI = phi 18; CHECK: %DEAD = phi 19 %existingPHI = phi i32* [ %a, %block2 ], [ %b, %block3 ] 20 %DEAD = load i32*, i32** %p 21 %c = load i32, i32* %DEAD 22 %d = load i32, i32* %existingPHI 23 %e = add i32 %c, %d 24 ret i32 %e 25} 26