maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

Disable processing of functions with EVEX-encoded instructions (AVX-512). 

Summary:
AVX-512 disassembler support in LLVM is not quite ready yet.
Before we feel more comfortable about it we disable processing
of all functions that use any EVEX-encoded instructions.

(cherry picked from FBD4028706)
This commit is contained in:
Maksim Panchenko 2016-10-16 18:56:56 -07:00
parent 0eb2559fee
commit 99dce7d05e
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
bolt/BinaryFunction.cpp
View File

@ -939,6 +939,17 @@ bool BinaryFunction::disassemble(ArrayRef<uint8_t> FunctionData) {
break;
}
if (MIA->hasEVEXEncoding(Instruction)) {
if (opts::Verbosity >= 1) {
errs() << "BOLT-WARNING: function " << *this << " uses instruction"
" encoded with EVEX (AVX-512) at offset 0x"
<< Twine::utohexstr(Offset) << ". Disassembly could be wrong."
" Skipping further processing.\n";
}
IsSimple = false;
break;
}
// Convert instruction to a shorter version that could be relaxed if needed.
MIA->shortenInstruction(Instruction);