Bug 403298

Summary: vex amd64->IR: unhandled instruction bytes: 0x8F 0xEA 0xF8 0x10 0xC9 0x3 0x1D 0x0 0x0 0xF3
Product: [Developer tools] valgrind Reporter: dcb314
Component: vexAssignee: Julian Seward <jseward>
Status: REPORTED ---    
Severity: normal    
Priority: NOR    
Version First Reported In: 3.15 SVN   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description dcb314 2019-01-17 09:04:06 UTC 
SUMMARY

Latest development versions of gcc compiler and valgrind
produce this:

vex amd64->IR: unhandled instruction bytes: 0x8F 0xEA 0xF8 0x10 0xC9 0x3 0x1D 0x0 0x0 0xF3
vex amd64->IR:   REX=0 REX.W=0 REX.R=0 REX.X=0 REX.B=0
vex amd64->IR:   VEX=0 VEX.L=0 VEX.nVVVV=0x0 ESC=NONE
vex amd64->IR:   PFX.66=0 PFX.F2=0 PFX.F3=0
==4087== valgrind: Unrecognised instruction at address 0x41ab9c.
==4087==    at 0x41AB9C: byte_re_compile_fastmap (regex.c:4584)

/proc/cpuinfo says


vendor_id	: AuthenticAMD
cpu family	: 21
model		: 2
model name	: AMD FX(tm)-8350 Eight-Core Processor
stepping	: 0


STEPS TO REPRODUCE
1. 
2. 
3. 

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
MacOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION