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