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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 %s3; RUN: opt < %s -passes=asan -asan-use-after-return=runtime -asan-use-after-scope=0 -S | FileCheck %s4; RUN: opt < %s -passes=asan -asan-use-after-return=always -asan-use-after-scope=0 -S | FileCheck %s5; RUN: opt < %s -passes=asan -asan-use-after-return=never -asan-use-after-scope=1 -S | FileCheck %s --check-prefix=CHECK-UAS6; RUN: opt < %s -passes=asan -asan-use-after-return=runtime -asan-use-after-scope=1 -S | FileCheck %s --check-prefix=CHECK-UAS7; RUN: opt < %s -passes=asan -asan-use-after-return=always -asan-use-after-scope=1 -S | FileCheck %s --check-prefix=CHECK-UAS8 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 11define i32 @basic_test(i64 %i) sanitize_address {12 ; CHECK-LABEL: define i32 @basic_test(13 14entry:15 %retval = alloca i32, align 416 %c = alloca [2 x i8], align 117 18 ; Memory is poisoned in prologue: F1F1F1F1F8F3F3F319 ; CHECK-UAS: store i64 -868082052615769615, ptr %{{[0-9]+}}20 ; CHECK-UAS-SS-NOT: store i6421 22 call void @llvm.lifetime.start.p0(ptr %c)23 ; Memory is unpoisoned at llvm.lifetime.start: 0124 ; CHECK-UAS: store i8 2, ptr %{{[0-9]+}}25 26 %ci = getelementptr inbounds [2 x i8], ptr %c, i64 0, i64 %i27 store volatile i32 0, ptr %retval28 store volatile i8 0, ptr %ci, align 129 30 call void @llvm.lifetime.end.p0(ptr %c)31 ; Memory is poisoned at llvm.lifetime.end: F832 ; CHECK-UAS: store i8 -8, ptr %{{[0-9]+}}33 ; CHECK-UAS-SS-NOT: store i8 -8,34 35 ; Unpoison memory at function exit in UAS mode.36 ; CHECK-UAS: store i64 0, ptr %{{[0-9]+}}37 ; CHECK-UAS: ret i32 038 ret i32 039}40 41; No poisoning/poisoning at all in plain mode.42; CHECK-NOT: __asan_poison_stack_memory43; CHECK-NOT: __asan_unpoison_stack_memory44