1 ; RUN: opt -gvn -S < %s | FileCheck %s 2 3 ; Check that an unreachable predecessor to a PHI node doesn't cause a crash. 4 ; PR21625. 5 6 define i32 @f(i32** %f) { 7 ; CHECK: bb0: 8 ; Load should be removed, since it's ignored. 9 ; CHECK-NEXT: br label 10 bb0: 11 %bar = load i32*, i32** %f 12 br label %bb2 13 bb1: 14 %zed = load i32*, i32** %f 15 br i1 false, label %bb1, label %bb2 16 bb2: 17 %foo = phi i32* [ null, %bb0 ], [ %zed, %bb1 ] 18 %storemerge = load i32, i32* %foo 19 ret i32 %storemerge 20 } 21
