diff options
| author | Devang Patel <dpatel@apple.com> | 2009-02-03 22:04:27 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2009-02-03 22:04:27 +0000 |
| commit | 28aa5de050e0f43617f2b5cce65edc8827f3e2f1 (patch) | |
| tree | f331ee36c170d5ab8e3a42a1e3015ee20a6360ae /lib | |
| parent | d839254888b1a2cc63c4a3336488ce3d3c05052d (diff) | |
If "optimize for size" attribute is set then block non-trivial loop unswitches but allow trivial loop unswitches.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63670 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/Scalar/LoopUnswitch.cpp | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp index a563c7a9ee..436e6a5786 100644 --- a/lib/Transforms/Scalar/LoopUnswitch.cpp +++ b/lib/Transforms/Scalar/LoopUnswitch.cpp @@ -430,9 +430,6 @@ bool LoopUnswitch::UnswitchIfProfitable(Value *LoopCond, Constant *Val){ initLoopData(); Function *F = loopHeader->getParent(); - // Do not unswitch if the function is optimized for size. - if (!F->isDeclaration() && F->hasFnAttr(Attribute::OptimizeForSize)) - return false; // Check to see if it would be profitable to unswitch current loop. unsigned Cost = getLoopUnswitchCost(LoopCond); @@ -440,6 +437,8 @@ bool LoopUnswitch::UnswitchIfProfitable(Value *LoopCond, Constant *Val){ // Do not do non-trivial unswitch while optimizing for size. if (Cost && OptimizeForSize) return false; + if (Cost && !F->isDeclaration() && F->hasFnAttr(Attribute::OptimizeForSize)) + return false; if (Cost > Threshold) { // FIXME: this should estimate growth by the amount of code shared by the |