1; Test handling of llvm.lifetime intrinsics in UAR/UAS modes. 2; RUN: opt < %s -passes=asan -asan-use-after-return=never -asan-use-after-scope=0 -S | FileCheck %s 3; RUN: opt < %s -passes=asan -asan-use-after-return=runtime -asan-use-after-scope=0 -S | FileCheck %s 4; RUN: opt < %s -passes=asan -asan-use-after-return=always -asan-use-after-scope=0 -S | FileCheck %s 5; RUN: opt < %s -passes=asan -asan-use-after-return=never -asan-use-after-scope=1 -S | FileCheck %s --check-prefix=CHECK-UAS 6; RUN: opt < %s -passes=asan -asan-use-after-return=runtime -asan-use-after-scope=1 -S | FileCheck %s --check-prefix=CHECK-UAS 7; RUN: opt < %s -passes=asan -asan-use-after-return=always -asan-use-after-scope=1 -S | FileCheck %s --check-prefix=CHECK-UAS 8 9target 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-S128" 10 11declare void @llvm.lifetime.start.p0(i64, ptr nocapture) nounwind 12declare void @llvm.lifetime.end.p0(i64, ptr nocapture) nounwind 13 14define i32 @basic_test(i64 %i) sanitize_address { 15 ; CHECK-LABEL: define i32 @basic_test( 16 17entry: 18 %retval = alloca i32, align 4 19 %c = alloca [2 x i8], align 1 20 21 ; Memory is poisoned in prologue: F1F1F1F104F3F8F2 22 ; CHECK-UAS: store i64 -866676825215864335, ptr %{{[0-9]+}} 23 ; CHECK-UAS-SS-NOT: store i64 24 25 call void @llvm.lifetime.start.p0(i64 1, ptr %c) 26 ; Memory is unpoisoned at llvm.lifetime.start: 01 27 ; CHECK-UAS: store i8 2, ptr %{{[0-9]+}} 28 29 %ci = getelementptr inbounds [2 x i8], ptr %c, i64 0, i64 %i 30 store volatile i32 0, ptr %retval 31 store volatile i8 0, ptr %ci, align 1 32 33 call void @llvm.lifetime.end.p0(i64 1, ptr %c) 34 ; Memory is poisoned at llvm.lifetime.end: F8 35 ; CHECK-UAS: store i8 -8, ptr %{{[0-9]+}} 36 ; CHECK-UAS-SS-NOT: store i8 -8, 37 38 ; Unpoison memory at function exit in UAS mode. 39 ; CHECK-UAS: store i64 0, ptr %{{[0-9]+}} 40 ; CHECK-UAS: ret i32 0 41 ret i32 0 42} 43 44; No poisoning/poisoning at all in plain mode. 45; CHECK-NOT: __asan_poison_stack_memory 46; CHECK-NOT: __asan_unpoison_stack_memory 47