llvm-6502/test/Instrumentation/AddressSanitizer/instrument_global.ll
Duncan P. N. Exon Smith 1ef70ff39b IR: Make metadata typeless in assembly
Now that `Metadata` is typeless, reflect that in the assembly.  These
are the matching assembly changes for the metadata/value split in
r223802.

  - Only use the `metadata` type when referencing metadata from a call
    intrinsic -- i.e., only when it's used as a `Value`.

  - Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode`
    when referencing it from call intrinsics.

So, assembly like this:

    define @foo(i32 %v) {
      call void @llvm.foo(metadata !{i32 %v}, metadata !0)
      call void @llvm.foo(metadata !{i32 7}, metadata !0)
      call void @llvm.foo(metadata !1, metadata !0)
      call void @llvm.foo(metadata !3, metadata !0)
      call void @llvm.foo(metadata !{metadata !3}, metadata !0)
      ret void, !bar !2
    }
    !0 = metadata !{metadata !2}
    !1 = metadata !{i32* @global}
    !2 = metadata !{metadata !3}
    !3 = metadata !{}

turns into this:

    define @foo(i32 %v) {
      call void @llvm.foo(metadata i32 %v, metadata !0)
      call void @llvm.foo(metadata i32 7, metadata !0)
      call void @llvm.foo(metadata i32* @global, metadata !0)
      call void @llvm.foo(metadata !3, metadata !0)
      call void @llvm.foo(metadata !{!3}, metadata !0)
      ret void, !bar !2
    }
    !0 = !{!2}
    !1 = !{i32* @global}
    !2 = !{!3}
    !3 = !{}

I wrote an upgrade script that handled almost all of the tests in llvm
and many of the tests in cfe (even handling many `CHECK` lines).  I've
attached it (or will attach it in a moment if you're speedy) to PR21532
to help everyone update their out-of-tree testcases.

This is part of PR21532.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224257 91177308-0d34-0410-b5e6-96231b3b80d8
2014-12-15 19:07:53 +00:00

83 lines
2.7 KiB
LLVM

; RUN: opt < %s -asan -asan-module -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"
target triple = "x86_64-unknown-linux-gnu"
@xxx = global i32 0, align 4
; If a global is present, __asan_[un]register_globals should be called from
; module ctor/dtor
; CHECK: llvm.global_ctors
; CHECK: @__asan_gen_ = private constant [8 x i8] c"<stdin>\00", align 1
; CHECK: llvm.global_dtors
; Test that we don't instrument global arrays with static initializer
; indexed with constants in-bounds. But instrument all other cases.
@GlobSt = global [10 x i32] zeroinitializer, align 16 ; static initializer
@GlobDy = global [10 x i32] zeroinitializer, align 16 ; dynamic initializer
@GlobEx = external global [10 x i32] , align 16 ; extern initializer
; GlobSt is declared here, and has static initializer -- ok to optimize.
define i32 @AccessGlobSt_0_2() sanitize_address {
entry:
%0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 0, i64 2), align 8
ret i32 %0
; CHECK-LABEL: define i32 @AccessGlobSt_0_2
; CHECK-NOT: __asan_report
; CHECK: ret i32 %0
}
; GlobSt is accessed out of bounds -- can't optimize
define i32 @AccessGlobSt_0_12() sanitize_address {
entry:
%0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 0, i64 12), align 8
ret i32 %0
; CHECK-LABEL: define i32 @AccessGlobSt_0_12
; CHECK: __asan_report
; CHECK: ret i32
}
; GlobSt is accessed with Gep that has non-0 first index -- can't optimize.
define i32 @AccessGlobSt_1_2() sanitize_address {
entry:
%0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 1, i64 2), align 8
ret i32 %0
; CHECK-LABEL: define i32 @AccessGlobSt_1_2
; CHECK: __asan_report
; CHECK: ret i32
}
; GlobDy is declared with dynamic initializer -- can't optimize.
define i32 @AccessGlobDy_0_2() sanitize_address {
entry:
%0 = load i32* getelementptr inbounds ([10 x i32]* @GlobDy, i64 0, i64 2), align 8
ret i32 %0
; CHECK-LABEL: define i32 @AccessGlobDy_0_2
; CHECK: __asan_report
; CHECK: ret i32
}
; GlobEx is an external global -- can't optimize.
define i32 @AccessGlobEx_0_2() sanitize_address {
entry:
%0 = load i32* getelementptr inbounds ([10 x i32]* @GlobEx, i64 0, i64 2), align 8
ret i32 %0
; CHECK-LABEL: define i32 @AccessGlobEx_0_2
; CHECK: __asan_report
; CHECK: ret i32
}
!llvm.asan.globals = !{!0}
!0 = !{[10 x i32]* @GlobDy, null, null, i1 true, i1 false}
; CHECK-LABEL: define internal void @asan.module_ctor
; CHECK-NOT: ret
; CHECK: call void @__asan_register_globals
; CHECK: ret
; CHECK-LABEL: define internal void @asan.module_dtor
; CHECK-NOT: ret
; CHECK: call void @__asan_unregister_globals
; CHECK: ret