teak-llvm/llvm
Reid Kleckner 05da2fe521 Sink all InitializePasses.h includes
This file lists every pass in LLVM, and is included by Pass.h, which is
very popular. Every time we add, remove, or rename a pass in LLVM, it
caused lots of recompilation.

I found this fact by looking at this table, which is sorted by the
number of times a file was changed over the last 100,000 git commits
multiplied by the number of object files that depend on it in the
current checkout:
  recompiles    touches affected_files  header
  342380        95      3604    llvm/include/llvm/ADT/STLExtras.h
  314730        234     1345    llvm/include/llvm/InitializePasses.h
  307036        118     2602    llvm/include/llvm/ADT/APInt.h
  213049        59      3611    llvm/include/llvm/Support/MathExtras.h
  170422        47      3626    llvm/include/llvm/Support/Compiler.h
  162225        45      3605    llvm/include/llvm/ADT/Optional.h
  158319        63      2513    llvm/include/llvm/ADT/Triple.h
  140322        39      3598    llvm/include/llvm/ADT/StringRef.h
  137647        59      2333    llvm/include/llvm/Support/Error.h
  131619        73      1803    llvm/include/llvm/Support/FileSystem.h

Before this change, touching InitializePasses.h would cause 1345 files
to recompile. After this change, touching it only causes 550 compiles in
an incremental rebuild.

Reviewers: bkramer, asbirlea, bollu, jdoerfert

Differential Revision: https://reviews.llvm.org/D70211
2019-11-13 16:34:37 -08:00
..
benchmarks
bindings
cmake Don't set LLVM_NO_DEAD_STRIP on AIX 2019-11-13 11:59:47 -05:00
docs [llvm-objcopy][COFF] Implement --redefine-sym and --redefine-syms 2019-11-12 11:28:00 -08:00
examples Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
include Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
lib Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
projects
resources
runtimes
test [AMDGPU] Fixed mfma-loop test. NFC. 2019-11-13 16:03:54 -08:00
tools Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
unittests [VFABI] Add LLVM internal mangling for vector functions. 2019-11-13 03:26:39 +00:00
utils [lit] Better/earlier errors for empty runs 2019-11-12 09:11:36 -08:00
.arcconfig
.clang-format
.clang-tidy
.gitattributes
.gitignore
CMakeLists.txt [Examples] Add IRTransformations directory to examples. 2019-11-12 14:14:48 +00:00
CODE_OWNERS.TXT
configure
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
README.txt
RELEASE_TESTERS.TXT

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