[LLVMbugs] [Bug 13625] New: Select peephole optimized is buggy
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Fri Aug 17 05:42:09 PDT 2012
http://llvm.org/bugs/show_bug.cgi?id=13625
Bug #: 13625
Summary: Select peephole optimized is buggy
Product: libraries
Version: trunk
Platform: PC
OS/Version: All
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: ARM
AssignedTo: unassignedbugs at nondot.org
ReportedBy: asl at math.spbu.ru
CC: llvmbugs at cs.uiuc.edu
Classification: Unclassified
Created attachment 9067
--> http://llvm.org/bugs/attachment.cgi?id=9067
Testcase
Consider the attached code.
Compiling with llc -mcpu=cortex-a9 triggers the assertion on Release+Asserts
mode and just crashes in Debug mode. valgrind says we have
MachineBasicBlock::end() dereference here. The pattern is pretty common - 75%
of code I have here yield compiler crash...
Removing isSelect from MOVCCr hides the problem.
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