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9c5542c040
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.
llvm-svn: 224257
92 lines
2.9 KiB
LLVM
92 lines
2.9 KiB
LLVM
; RUN: opt < %s -asan -asan-module -S | FileCheck %s
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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"
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target triple = "x86_64-unknown-linux-gnu"
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@xxx = internal global i32 0, align 4 ; With dynamic initializer.
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@XXX = global i32 0, align 4 ; With dynamic initializer.
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@yyy = internal global i32 0, align 4 ; W/o dynamic initializer.
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@YYY = global i32 0, align 4 ; W/o dynamic initializer.
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; Clang will emit the following metadata identifying @xxx as dynamically
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; initialized.
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!0 = !{i32* @xxx, null, null, i1 true, i1 false}
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!1 = !{i32* @XXX, null, null, i1 true, i1 false}
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!2 = !{i32* @yyy, null, null, i1 false, i1 false}
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!3 = !{i32* @YYY, null, null, i1 false, i1 false}
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!llvm.asan.globals = !{!0, !1, !2, !3}
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define i32 @initializer() uwtable {
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entry:
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ret i32 42
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}
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define internal void @__cxx_global_var_init() section ".text.startup" {
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entry:
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%call = call i32 @initializer()
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store i32 %call, i32* @xxx, align 4
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ret void
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}
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@llvm.global_ctors = appending global [2 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @__late_ctor }, { i32, void ()* } { i32 0, void ()* @__early_ctor }]
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define internal void @__late_ctor() sanitize_address section ".text.startup" {
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entry:
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call void @__cxx_global_var_init()
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ret void
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}
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; Clang indicated that @xxx was dynamically initailized.
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; __asan_{before,after}_dynamic_init should be called from __late_ctor
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; CHECK-LABEL: define internal void @__late_ctor
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; CHECK-NOT: ret
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; CHECK: call void @__asan_before_dynamic_init
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; CHECK: call void @__cxx_global_var_init
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; CHECK: call void @__asan_after_dynamic_init
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; CHECK: ret
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; CTOR with priority 0 should not be instrumented.
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define internal void @__early_ctor() sanitize_address section ".text.startup" {
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entry:
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call void @__cxx_global_var_init()
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ret void
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}
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; CHECK-LABEL: define internal void @__early_ctor
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; CHECK-NOT: __asan
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; CHECK: ret
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; Check that xxx is instrumented.
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define void @touch_xxx() sanitize_address {
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store i32 0, i32 *@xxx, align 4
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ret void
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; CHECK-LABEL: touch_xxx
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; CHECK: call void @__asan_report_store4
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; CHECK: ret void
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}
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; Check that XXX is instrumented.
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define void @touch_XXX() sanitize_address {
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store i32 0, i32 *@XXX, align 4
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ret void
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; CHECK: define void @touch_XXX
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; CHECK: call void @__asan_report_store4
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; CHECK: ret void
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}
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; Check that yyy is NOT instrumented (as it does not have dynamic initializer).
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define void @touch_yyy() sanitize_address {
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store i32 0, i32 *@yyy, align 4
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ret void
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; CHECK: define void @touch_yyy
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; CHECK-NOT: call void @__asan_report_store4
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; CHECK: ret void
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}
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; Check that YYY is NOT instrumented (as it does not have dynamic initializer).
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define void @touch_YYY() sanitize_address {
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store i32 0, i32 *@YYY, align 4
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ret void
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; CHECK: define void @touch_YYY
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; CHECK-NOT: call void @__asan_report_store4
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; CHECK: ret void
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}
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