1 files changed, 42 insertions, 0 deletions
diff --git a/test/Instrumentation/AddressSanitizer/stack_dynamic_alloca.ll b/test/Instrumentation/AddressSanitizer/stack_dynamic_alloca.ll
new file mode 100644
index 0000000..43711b7
--- /dev/null
+++ b/test/Instrumentation/AddressSanitizer/stack_dynamic_alloca.ll
@@ -0,0 +1,42 @@
+; RUN: opt < %s -asan -asan-module -asan-stack-dynamic-alloca \
+; RUN:       -asan-use-after-return -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-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @Func1() sanitize_address {
+entry:
+; CHECK-LABEL: Func1
+
+; CHECK: entry:
+; CHECK: load i32* @__asan_option_detect_stack_use_after_return
+
+; CHECK: <label>:[[UAR_ENABLED_BB:[0-9]+]]
+; CHECK: [[FAKE_STACK_RT:%[0-9]+]] = call i64 @__asan_stack_malloc_
+
+; CHECK: <label>:[[FAKE_STACK_BB:[0-9]+]]
+; CHECK: [[FAKE_STACK:%[0-9]+]] = phi i64 [ 0, %entry ], [ [[FAKE_STACK_RT]], %[[UAR_ENABLED_BB]] ]
+; CHECK: icmp eq i64 [[FAKE_STACK]], 0
+
+; CHECK: <label>:[[NO_FAKE_STACK_BB:[0-9]+]]
+; CHECK: %MyAlloca = alloca i8, i64
+; CHECK: [[ALLOCA:%[0-9]+]] = ptrtoint i8* %MyAlloca
+
+; CHECK: phi i64 [ [[FAKE_STACK]], %[[FAKE_STACK_BB]] ], [ [[ALLOCA]], %[[NO_FAKE_STACK_BB]] ]
+
+; CHECK: ret void
+
+  %XXX = alloca [20 x i8], align 1
+  ret void
+}
+
+; Test that dynamic alloca is not used for functions with inline assembly.
+define void @Func2() sanitize_address {
+entry:
+; CHECK-LABEL: Func2
+; CHECK: alloca [96 x i8]
+; CHECK: ret void
+
+  %XXX = alloca [20 x i8], align 1
+  call void asm sideeffect "mov %%rbx, %%rcx", "~{dirflag},~{fpsr},~{flags}"() nounwind
+  ret void
+}