https://bugs.llvm.org/show_bug.cgi?id=35392
Bug ID: 35392
Summary: Crash in 'Machine Common Subexpression Elimination'
and possibly other passes
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Common Code Generator Code
Assignee: unassignedb...@nondot.org
Reporter: rtr...@google.com
CC: llvm-bugs@lists.llvm.org
Created attachment 19458
--> https://bugs.llvm.org/attachment.cgi?id=19458&action=edit
Example code
Stack dump:
0. Program arguments: clang -cc1 -triple x86_64-unknown-linux-gnu
-emit-obj -target-cpu x86-64 -O1 -std=c++11 -fsanitize=address -x c++ test.cpp
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'test.cpp'.
4. Running pass 'Machine Common Subexpression Elimination' on function
'@_ZNK1S3RunER1RR4Pair'
Segmentation fault (core dumped)
clang -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -target-cpu x86-64 -O1
-std=c++11 -fsanitize=address -x c++ test.cpp
The attached file uses macros to generate many repetitive branches in the
function. Once preprocessed, the code is over four thousands lines. Compiling
can take a few minutes. MachineCSE was not the only pass seen while reducing
this example. These are all the passes seen in crash logs:
'Machine Common Subexpression Elimination'
'X86 DAG->DAG Instruction Selection'
'Live Variable Analysis'
'X86 Optimize Call Frame'
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
