diff options
| author | Reid Kleckner <reid@kleckner.net> | 2014-04-24 20:14:34 +0000 |
|---|---|---|
| committer | Reid Kleckner <reid@kleckner.net> | 2014-04-24 20:14:34 +0000 |
| commit | 5772b77789728e045ccd8c93d79820632e81c4e6 (patch) | |
| tree | 6f4029a3081e1f1e6a0f9e9576737c5506e59bd1 /llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | |
| parent | 0fbb1e91e57829d277bbea3ef1402ee7bc871dea (diff) | |
| download | llvm-5772b77789728e045ccd8c93d79820632e81c4e6.zip llvm-5772b77789728e045ccd8c93d79820632e81c4e6.tar.gz llvm-5772b77789728e045ccd8c93d79820632e81c4e6.tar.bz2 | |
Add 'musttail' marker to call instructions
This is similar to the 'tail' marker, except that it guarantees that
tail call optimization will occur. It also comes with convervative IR
verification rules that ensure that tail call optimization is possible.
Reviewers: nicholas
Differential Revision: http://llvm-reviews.chandlerc.com/D3240
llvm-svn: 207143
Diffstat (limited to 'llvm/lib/Bitcode/Writer/BitcodeWriter.cpp')
| -rw-r--r-- | llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp index 62dba41..92965fa 100644 --- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp +++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp @@ -1469,7 +1469,8 @@ static void WriteInstruction(const Instruction &I, unsigned InstID, Code = bitc::FUNC_CODE_INST_CALL; Vals.push_back(VE.getAttributeID(CI.getAttributes())); - Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall())); + Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall()) | + unsigned(CI.isMustTailCall()) << 14); PushValueAndType(CI.getCalledValue(), InstID, Vals, VE); // Callee // Emit value #'s for the fixed parameters. |