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| author | Philip Reames <listmail@philipreames.com> | 2019-05-09 23:13:09 +0000 |
|---|---|---|
| committer | Philip Reames <listmail@philipreames.com> | 2019-05-09 23:13:09 +0000 |
| commit | 76ea748d2d24144c1a50c0ce5c5b41dbcab0ac15 (patch) | |
| tree | 137b1084c0abc087c681d2f61b4859e1dc70d66f /llvm/lib/Analysis/TargetLibraryInfo.cpp | |
| parent | 3478494c1fdcbbee3e22895dcd6e6919d6c05430 (diff) | |
| download | bcm5719-llvm-76ea748d2d24144c1a50c0ce5c5b41dbcab0ac15.tar.gz bcm5719-llvm-76ea748d2d24144c1a50c0ce5c5b41dbcab0ac15.zip | |
Compile time tweak for libcall lookup
If we have a large module which is mostly intrinsics, we hammer the lib call lookup path from CodeGenPrepare. Adding a fastpath reduces compile by 15% for one such example.
The problem is really more general than intrinsics - a module with lots of non-intrinsics non-libcall calls has the same problem - but we might as well avoid an easy case quickly.
llvm-svn: 360391
Diffstat (limited to 'llvm/lib/Analysis/TargetLibraryInfo.cpp')
| -rw-r--r-- | llvm/lib/Analysis/TargetLibraryInfo.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/TargetLibraryInfo.cpp b/llvm/lib/Analysis/TargetLibraryInfo.cpp index 10bb4ab17ca..97b5ef2f6bc 100644 --- a/llvm/lib/Analysis/TargetLibraryInfo.cpp +++ b/llvm/lib/Analysis/TargetLibraryInfo.cpp @@ -1434,6 +1434,11 @@ bool TargetLibraryInfoImpl::isValidProtoForLibFunc(const FunctionType &FTy, bool TargetLibraryInfoImpl::getLibFunc(const Function &FDecl, LibFunc &F) const { + // Intrinsics don't overlap w/libcalls; if our module has a large number of + // intrinsics, this ends up being an interesting compile time win since we + // avoid string normalization and comparison. + if (FDecl.isIntrinsic()) return false; + const DataLayout *DL = FDecl.getParent() ? &FDecl.getParent()->getDataLayout() : nullptr; return getLibFunc(FDecl.getName(), F) && |
