diff test/CodeGen/X86/x86-sanitizer-shrink-wrapping.ll @ 100:7d135dc70f03 LLVM 3.9

LLVM 3.9
author Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
date Tue, 26 Jan 2016 22:53:40 +0900
parents
children 803732b1fca8
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/CodeGen/X86/x86-sanitizer-shrink-wrapping.ll	Tue Jan 26 22:53:40 2016 +0900
@@ -0,0 +1,40 @@
+; RUN: llc -o - < %s | FileCheck %s
+
+target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
+target triple = "x86_64-apple-macosx"
+
+; Even if the target supports shrink-wrapping, the prologue and epilogue
+; must not move because a crash can happen anywhere and sanitizers need
+; to be able to unwind from the PC of the crash.
+; CHECK-LABEL: sanitize:
+; CHECK: pushq
+; CHECK: incl 40
+; CHECK: popq
+; CHECK-NEXT: retq
+; CHECK: movl $40, %edi
+; CHECK-NEXT callq ___asan_report_load4
+define  void @sanitize() #0 {
+entry:
+  %tmp = load i8, i8* inttoptr (i64 17592186044421 to i8*)
+  %tmp1 = icmp ne i8 %tmp, 0
+  br i1 %tmp1, label %if.then, label %else
+
+if.then:
+  %tmp3 = icmp sge i8 3, %tmp
+  br i1 %tmp3, label %else, label %end
+
+else:
+  call void @__asan_report_load4(i64 40)
+  call void asm sideeffect "", ""()
+  unreachable
+
+end:
+  %tmp6 = load i32, i32* inttoptr (i64 40 to i32*), align 8
+  %inc = add nsw i32 %tmp6, 1
+  store i32 %inc, i32* inttoptr (i64 40 to i32*), align 8
+  ret void
+}
+
+attributes #0 = { sanitize_address nounwind "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" }
+
+declare void @__asan_report_load4(i64)