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Add 'notail' marker for call instructions.

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This marker prevents optimization passes from adding 'tail' or
'musttail' markers to a call. Is is used to prevent tail call
optimization from being performed on the call.

rdar://problem/22667622

Differential Revision: http://reviews.llvm.org/D12923


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252368 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka
2015-11-06 23:55:38 +00:00
parent 6bd362c2d9
commit c35973bfb0
11 changed files with 56 additions and 6 deletions
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2
lib/Bitcode/Reader/BitcodeReader.cpp
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@@ -5002,6 +5002,8 @@ std::error_code BitcodeReader::parseFunctionBody(Function *F) {
TCK = CallInst::TCK_Tail;
if (CCInfo & (1 << 14))
TCK = CallInst::TCK_MustTail;
if (CCInfo & (1 << 16))
TCK = CallInst::TCK_NoTail;
cast<CallInst>(I)->setTailCallKind(TCK);
cast<CallInst>(I)->setAttributes(PAL);
break;