1; Test that AddressSanitizer instruments "(*a)++" only once. 2; RUN: opt < %s -asan -asan-module -S -asan-opt=1 | FileCheck %s -check-prefix=OPT1 3; RUN: opt < %s -asan -asan-module -S -asan-opt=0 | FileCheck %s -check-prefix=OPT0 4 5target 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" 6target triple = "x86_64-unknown-linux-gnu" 7define void @IncrementMe(i32* %a) sanitize_address { 8entry: 9 %tmp1 = load i32, i32* %a, align 4 10 %tmp2 = add i32 %tmp1, 1 11 store i32 %tmp2, i32* %a, align 4 12 ret void 13} 14 15; With optimizations enabled we should see only one call to __asan_report_* 16; OPT1: IncrementMe 17; OPT1: __asan_report_ 18; OPT1-NOT: __asan_report_ 19; OPT1: asan.module_ctor 20 21; Without optimizations we should see two calls to __asan_report_* 22; OPT0: IncrementMe 23; OPT0: __asan_report_ 24; OPT0: __asan_report_ 25; OPT0: asan.module_ctor 26