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| author | Reid Kleckner <reid@kleckner.net> | 2014-01-28 02:38:36 +0000 |
|---|---|---|
| committer | Reid Kleckner <reid@kleckner.net> | 2014-01-28 02:38:36 +0000 |
| commit | 26af2cae05f4a8f5a66f5ef0f5d107fef174a7f3 (patch) | |
| tree | a65d86dd391f8685236fb16cf2046d4603833099 /llvm/lib/Transforms/IPO/FunctionAttrs.cpp | |
| parent | 020acd88ecc4b99632b6af54e7e7f77ab70b4a30 (diff) | |
| download | bcm5719-llvm-26af2cae05f4a8f5a66f5ef0f5d107fef174a7f3.tar.gz bcm5719-llvm-26af2cae05f4a8f5a66f5ef0f5d107fef174a7f3.zip | |
Update optimization passes to handle inalloca arguments
Summary:
I searched Transforms/ and Analysis/ for 'ByVal' and updated those call
sites to check for inalloca if appropriate.
I added tests for any change that would allow an optimization to fire on
inalloca.
Reviewers: nlewycky
Differential Revision: http://llvm-reviews.chandlerc.com/D2449
llvm-svn: 200281
Diffstat (limited to 'llvm/lib/Transforms/IPO/FunctionAttrs.cpp')
| -rw-r--r-- | llvm/lib/Transforms/IPO/FunctionAttrs.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/IPO/FunctionAttrs.cpp b/llvm/lib/Transforms/IPO/FunctionAttrs.cpp index ea664506da2..92d2f79fa73 100644 --- a/llvm/lib/Transforms/IPO/FunctionAttrs.cpp +++ b/llvm/lib/Transforms/IPO/FunctionAttrs.cpp @@ -414,6 +414,10 @@ determinePointerReadAttrs(Argument *A, SmallSet<Use*, 32> Visited; int Count = 0; + // inalloca arguments are always clobbered by the call. + if (A->hasInAllocaAttr()) + return Attribute::None; + bool IsRead = false; // We don't need to track IsWritten. If A is written to, return immediately. |
