RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-23 19:23:23 +01:00
Code Issues Projects Releases Wiki Activity

[AMDGPU][MC] Corrected branch relocation handling to detect undefined labels

Browse Source 
Fixed ELF object writer to die gracefully when an undefined label is encountered in a branch instruction.
See https://bugs.llvm.org/show_bug.cgi?id=41914.

Reviewers: arsenm, rampitec

Differential Revision: https://reviews.llvm.org/D79943
This commit is contained in:
Dmitry Preobrazhensky 2020-05-18 14:04:58 +03:00
parent 6004a9d575
commit 549758f522
2 changed files with 15 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
lib/Target/AMDGPU/MCTargetDesc/AMDGPUELFObjectWriter.cpp
View File

@ -6,8 +6,10 @@
//
//===----------------------------------------------------------------------===//
#include "AMDGPUFixupKinds.h"
#include "AMDGPUMCTargetDesc.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCFixup.h"
@ -80,6 +82,15 @@ unsigned AMDGPUELFObjectWriter::getRelocType(MCContext &Ctx,
return ELF::R_AMDGPU_ABS64;
}
if (Fixup.getTargetKind() == AMDGPU::fixup_si_sopp_br) {
const auto *SymA = Target.getSymA();
assert(SymA);
Ctx.reportError(Fixup.getLoc(),
Twine("undefined label '") + SymA->getSymbol().getName() + "'");
return ELF::R_AMDGPU_NONE;
}
llvm_unreachable("unhandled relocation type");
}

4
test/MC/AMDGPU/labels-branch-err.s Normal file
View File

@ -0,0 +1,4 @@
// RUN: not llvm-mc -arch=amdgcn -filetype=obj -o /dev/null %s 2>&1 | FileCheck -check-prefix=ERROR %s
// ERROR: error: undefined label 'undef_label'
s_branch undef_label