RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-02-11 07:18:44 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[cfi] Build __cfi_check as Thumb when applicable.

Browse Source 
Summary:
Cross-DSO CFI needs all __cfi_check exports to use the same encoding
(ARM vs Thumb).

Reviewers: pcc

Subscribers: aemerson, srhines, kristof.beyls, hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D37243

llvm-svn: 312052
This commit is contained in:
Evgeniy Stepanov 2017-08-29 22:29:15 +00:00
parent 729e7c6e1c
commit 8b7ba14751
2 changed files with 28 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
lib/Transforms/IPO/CrossDSOCFI.cpp
View File

@ -16,6 +16,7 @@
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/EquivalenceClasses.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/Triple.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Function.h"
@ -115,6 +116,11 @@ void CrossDSOCFI::buildCFICheck(Module &M) {
// linker knows about the symbol; this pass replaces the function body.
F->deleteBody();
F->setAlignment(4096);
Triple T(M.getTargetTriple());
if (T.isARM() || T.isThumb())
F->addFnAttr("target-features", "+thumb-mode");
auto args = F->arg_begin();
Value &CallSiteTypeId = *(args++);
CallSiteTypeId.setName("CallSiteTypeId");

22
test/Transforms/CrossDSOCFI/thumb.ll Normal file
View File

@ -0,0 +1,22 @@
; RUN: opt -mtriple=armv7-linux-android -S -cross-dso-cfi < %s | FileCheck --check-prefix=THUMB %s
; RUN: opt -mtriple=thumbv7-linux-android -S -cross-dso-cfi < %s | FileCheck --check-prefix=THUMB %s
; RUN: opt -mtriple=i386-linux -S -cross-dso-cfi < %s | FileCheck --check-prefix=NOTHUMB %s
; RUN: opt -mtriple=x86_64-linux -S -cross-dso-cfi < %s | FileCheck --check-prefix=NOTHUMB %s
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
define signext i8 @f() !type !0 !type !1 {
entry:
ret i8 1
}
!llvm.module.flags = !{!2}
!0 = !{i64 0, !"_ZTSFcvE"}
!1 = !{i64 0, i64 111}
!2 = !{i32 4, !"Cross-DSO CFI", i32 1}
; THUMB: define void @__cfi_check({{.*}} #[[A:.*]] align 4096
; THUMB: attributes #[[A]] = { {{.*}}"target-features"="+thumb-mode"
; NOTHUMB: define void @__cfi_check({{.*}} align 4096