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1; This testcase can be simplified by "realizing" that alloca can never return2; null.3; RUN: opt < %s -passes=instcombine,simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s4; CHECK-NOT: br5 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 %UnifiedExitNode13 14then: ; preds = %entry15 %tmp.4 = call i32 (...) @bitmap_clear( ptr %live_head ) ; <i32> [#uses=0]16 br label %UnifiedExitNode17 18UnifiedExitNode: ; preds = %then, %entry19 ret i32 020}21 22