1; RUN: opt < %s -asan -asan-module -asan-stack-dynamic-alloca \ 2; RUN: -asan-use-after-return -S | FileCheck %s 3target 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" 4target triple = "x86_64-unknown-linux-gnu" 5 6define void @Func1() sanitize_address { 7entry: 8; CHECK-LABEL: Func1 9 10; CHECK: entry: 11; CHECK: load i32* @__asan_option_detect_stack_use_after_return 12 13; CHECK: <label>:[[UAR_ENABLED_BB:[0-9]+]] 14; CHECK: [[FAKE_STACK_RT:%[0-9]+]] = call i64 @__asan_stack_malloc_ 15 16; CHECK: <label>:[[FAKE_STACK_BB:[0-9]+]] 17; CHECK: [[FAKE_STACK:%[0-9]+]] = phi i64 [ 0, %entry ], [ [[FAKE_STACK_RT]], %[[UAR_ENABLED_BB]] ] 18; CHECK: icmp eq i64 [[FAKE_STACK]], 0 19 20; CHECK: <label>:[[NO_FAKE_STACK_BB:[0-9]+]] 21; CHECK: %MyAlloca = alloca i8, i64 22; CHECK: [[ALLOCA:%[0-9]+]] = ptrtoint i8* %MyAlloca 23 24; CHECK: phi i64 [ [[FAKE_STACK]], %[[FAKE_STACK_BB]] ], [ [[ALLOCA]], %[[NO_FAKE_STACK_BB]] ] 25 26; CHECK: ret void 27 28 %XXX = alloca [20 x i8], align 1 29 ret void 30} 31 32; Test that dynamic alloca is not used for functions with inline assembly. 33define void @Func2() sanitize_address { 34entry: 35; CHECK-LABEL: Func2 36; CHECK: alloca [96 x i8] 37; CHECK: ret void 38 39 %XXX = alloca [20 x i8], align 1 40 call void asm sideeffect "mov %%rbx, %%rcx", "~{dirflag},~{fpsr},~{flags}"() nounwind 41 ret void 42} 43