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; RUN: opt -passes=hwasan -hwasan-use-stack-safety=0 -hwasan-use-after-scope -S < %s | FileCheck %s
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-unknown-linux-android29"
@stackbuf = dso_local local_unnamed_addr global i8* null, align 8
@jbuf = dso_local global [32 x i64] zeroinitializer, align 8
declare void @may_jump()
define dso_local noundef i1 @_Z6targetv() sanitize_hwaddress {
entry:
%buf = alloca [4096 x i8], align 1
%call = call i32 @setjmp(i64* noundef getelementptr inbounds ([32 x i64], [32 x i64]* @jbuf, i64 0, i64 0))
switch i32 %call, label %while.body [
i32 1, label %return
i32 2, label %sw.bb1
]
sw.bb1: ; preds = %entry
br label %return
while.body: ; preds = %entry
%0 = getelementptr inbounds [4096 x i8], [4096 x i8]* %buf, i64 0, i64 0
call void @llvm.lifetime.start.p0i8(i64 4096, i8* nonnull %0) #10
store i8* %0, i8** @stackbuf, align 8
; may_jump may call longjmp, going back to the switch (and then the return),
; bypassing the lifetime.end. This is why we need to untag on the return,
; rather than the lifetime.end.
call void @may_jump()
call void @llvm.lifetime.end.p0i8(i64 4096, i8* nonnull %0) #10
br label %return
; CHECK-LABEL: return:
; CHECK: void @llvm.memset.p0i8.i64({{.*}}, i8 0, i64 256, i1 false)
return: ; preds = %entry, %while.body, %sw.bb1
%retval.0 = phi i1 [ true, %while.body ], [ true, %sw.bb1 ], [ false, %entry ]
ret i1 %retval.0
}
declare i32 @setjmp(i64* noundef) returns_twice
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
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