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| author | Rafael Espindola <rafael.espindola@gmail.com> | 2014-01-23 17:19:42 +0000 |
|---|---|---|
| committer | Rafael Espindola <rafael.espindola@gmail.com> | 2014-01-23 17:19:42 +0000 |
| commit | 35b78fd04c4b1e2a0b648a2d5d0463cfa8f4c0ce (patch) | |
| tree | 118156f3bfd080edcd31be4d0b5fdd50bb92e226 /lib/Transforms/IPO | |
| parent | 7d3b9d96b6405c1a0b6d1ae73d5a4a1d506d500d (diff) | |
| download | llvm-35b78fd04c4b1e2a0b648a2d5d0463cfa8f4c0ce.tar.gz llvm-35b78fd04c4b1e2a0b648a2d5d0463cfa8f4c0ce.tar.bz2 llvm-35b78fd04c4b1e2a0b648a2d5d0463cfa8f4c0ce.tar.xz | |
Remove tail marker when changing an argument to an alloca.
Argument promotion can replace an argument of a call with an alloca. This
requires clearing the tail marker as it is very likely that the callee is now
using an alloca in the caller.
This fixes pr14710.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199909 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/IPO')
| -rw-r--r-- | lib/Transforms/IPO/ArgumentPromotion.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Transforms/IPO/ArgumentPromotion.cpp b/lib/Transforms/IPO/ArgumentPromotion.cpp index 49a67211db..ea24d52694 100644 --- a/lib/Transforms/IPO/ArgumentPromotion.cpp +++ b/lib/Transforms/IPO/ArgumentPromotion.cpp @@ -807,6 +807,16 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F, I->replaceAllUsesWith(TheAlloca); TheAlloca->takeName(I); AA.replaceWithNewValue(I, TheAlloca); + + // If the alloca is used in a call, we must clear the tail flag since + // the callee now uses an alloca from the caller. + for (Value::use_iterator UI = TheAlloca->use_begin(), + E = TheAlloca->use_end(); UI != E; ++UI) { + CallInst *Call = dyn_cast<CallInst>(*UI); + if (!Call) + continue; + Call->setTailCall(false); + } continue; } |