1; This testcase can be simplified by "realizing" that alloca can never return 2; null. 3; RUN: opt < %s -passes=instcombine,simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s 4; CHECK-NOT: br 5 6declare i32 @bitmap_clear(...) 7 8define i32 @oof() { 9entry: 10 %live_head = alloca i32 ; <ptr> [#uses=2] 11 %tmp.1 = icmp ne ptr %live_head, null ; <i1> [#uses=1] 12 br i1 %tmp.1, label %then, label %UnifiedExitNode 13 14then: ; preds = %entry 15 %tmp.4 = call i32 (...) @bitmap_clear( ptr %live_head ) ; <i32> [#uses=0] 16 br label %UnifiedExitNode 17 18UnifiedExitNode: ; preds = %then, %entry 19 ret i32 0 20} 21 22