After c718336c the output of print-before/print-after was changed.
A semicolon was added before the banner "*** IR Dump ..." and this
change broke chunk-print-before-all script.
This change makes it more resilient to small output format variations.
As part of this patch, I added the ability to add leading zeros.
This is necessary so that the generated files are sorted in ascending order.
Reviewed By: yrouban
Differential Revision: https://reviews.llvm.org/D145484
As part of this patch, the ability to work with dump files
containing ir after passes received using the -print-after-all
option was added to script chunk-print-before-all.py.
The names of the output files have also been changed.
Before: chunk-NUM.ll
Now: NUM-STAGE-PASS_NAME.ll
NUM - sequence number of the pass operation.
STAGE - stage of the pass operation (for example: before, after, dump).
PASS_NAME - the name of the pass.
Prior to the fix, the script was not annotating the first line of
chunk-0.ll. Because of that, a compilation with ./bin/opt was failing.
The extra if-statement ensures that the corner case is covered
Reviewed-By: apilipenko
Differential Revision: https://reviews.llvm.org/D76507
Simple little utility which takes a opt logfile generated with "opt -print-before-all -print-module-scope -o /dev/null <args> 2&>1", and splits into a series of individual "chunk-X.ll" files. The intended purpose is to help automate one step in failure reduction.
The imagined workflow is:
New crasher bug reported against clang or other frontend
Frontend run with -emit-llvm equivalent and manually confirmed that opt -O2 <emit.ll> crashes
Run this splitter script
Manually map pass name to invocation command (next on the to automate list)
Run bugpoint on last chunk file + manual command
I chose to dump every chunk rather than only the last since miscompile debugging frequently requires either manual step by step reduction, or cross feeding IR into different compiler versions. Not an immediate target, but there may be applications.
Differential Revision: https://reviews.llvm.org/D63461
llvm-svn: 363884
