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author | Reid Kleckner <rnk@google.com> | 2019-11-13 13:15:01 -0800 |
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committer | Reid Kleckner <rnk@google.com> | 2019-11-13 16:34:37 -0800 |
commit | 05da2fe52162c80dfa18aedf70cf73cb11201811 (patch) | |
tree | c135ce2401ff5178b42987a7768ed67aaa93b410 /llvm/lib/CodeGen/TailDuplication.cpp | |
parent | a36f316390d4bc1bcb0e9de0f55831385ab24099 (diff) | |
download | llvm-05da2fe52162c80dfa18aedf70cf73cb11201811.zip llvm-05da2fe52162c80dfa18aedf70cf73cb11201811.tar.gz llvm-05da2fe52162c80dfa18aedf70cf73cb11201811.tar.bz2 |
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
Diffstat (limited to 'llvm/lib/CodeGen/TailDuplication.cpp')
-rw-r--r-- | llvm/lib/CodeGen/TailDuplication.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/TailDuplication.cpp b/llvm/lib/CodeGen/TailDuplication.cpp index ba348b4..b4d0a30 100644 --- a/llvm/lib/CodeGen/TailDuplication.cpp +++ b/llvm/lib/CodeGen/TailDuplication.cpp @@ -18,6 +18,7 @@ #include "llvm/CodeGen/MachineRegisterInfo.h" #include "llvm/CodeGen/Passes.h" #include "llvm/CodeGen/TailDuplicator.h" +#include "llvm/InitializePasses.h" #include "llvm/Pass.h" using namespace llvm; |