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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2021-05-14 11:35:02 +0100 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2021-05-14 11:42:51 +0100 |
| commit | 78c8451cd7b1d789fdd81beac0d3f7172bdce31c (patch) | |
| tree | 528123b44214076bd97e2b2b83dab51343138363 /llvm/lib/Transforms/Utils/Local.cpp | |
| parent | 7ba0e99aec6e461f41ebad608893f8c280836165 (diff) | |
| download | llvm-78c8451cd7b1d789fdd81beac0d3f7172bdce31c.zip llvm-78c8451cd7b1d789fdd81beac0d3f7172bdce31c.tar.gz llvm-78c8451cd7b1d789fdd81beac0d3f7172bdce31c.tar.bz2 | |
[Local] collectBitParts - reduce maximum recursion depth.
As noticed on D90170, the recursion depth for matching a maximum of a i128 bitwidth was too high.
@lebedev.ri mentioned that we can probably do better by limiting the number of collected Values instead of just depth, but I'll look at that later.
Diffstat (limited to 'llvm/lib/Transforms/Utils/Local.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/Local.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp index ecabe21..1f0646d 100644 --- a/llvm/lib/Transforms/Utils/Local.cpp +++ b/llvm/lib/Transforms/Utils/Local.cpp @@ -111,8 +111,8 @@ static cl::opt<unsigned> PHICSENumPHISmallSize( "perform a (faster!) exhaustive search instead of set-driven one.")); // Max recursion depth for collectBitParts used when detecting bswap and -// bitreverse idioms -static const unsigned BitPartRecursionMaxDepth = 64; +// bitreverse idioms. +static const unsigned BitPartRecursionMaxDepth = 48; //===----------------------------------------------------------------------===// // Local constant propagation. |