[PATCH] D30788: [Polly] Add -polly-dump-module pass.
Michael Kruse via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Mar 9 12:54:05 PST 2017
Meinersbur created this revision.
Meinersbur added a project: Polly.
Herald added a subscriber: mgorny.
This pass allows writing the LLVM-IR just before and after the Polly
passes to a file.
Dumping the IR before Polly helps reproducing bugs that occur in code
generated by clang. It is the only reliable way to get the IR that
triggers a bug. The alternative is to emit the IR with
clang -c -emit-llvm -S -o dump.ll
then pass it through all optimization passes
opt dump.ll -basicaa -sroa ... -S -o optdump.ll
to then reproduce the error with
opt optdump.ll -polly-opt-isl -polly-codegen -analyze
However, the IR is not the same. -O3 uses a PassBuilder than creates passes
with different parameters than the default.
Dumping the IR after Polly is useful to compare a miscompilation with
a known-good configuration.
https://reviews.llvm.org/D30788
Files:
include/polly/LinkAllPasses.h
include/polly/Support/DumpModulePass.h
lib/CMakeLists.txt
lib/Support/DumpModulePass.cpp
lib/Support/RegisterPasses.cpp
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