llvm-project/llvm/test/Instrumentation/AddressSanitizer/undecidable-dynamic-alloca-...

24 lines
635 B
LLVM

; Test that undecidable dynamic allocas are skipped by ASan.
; RUN: opt < %s -asan -asan-module -asan-instrument-allocas=1 -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-unknown-linux-gnu"
define void @g(i64 %n) sanitize_address {
entry:
%cmp = icmp sgt i64 %n, 100
br i1 %cmp, label %do_alloca, label %done
do_alloca:
; CHECK-NOT: store i32 -892679478
%0 = alloca i8, i64 %n, align 1
call void @f(i8* %0)
br label %done
done:
ret void
}
declare void @f(i8*)