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Minor extension to llvm.experimental.patchpoint: don't require a call.

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If a null call target is provided, don't emit a dummy call. This
allows the runtime to reserve as little nop space as it needs without
the requirement of emitting a call.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194676 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick
2013-11-14 06:54:10 +00:00
parent 27df434c5e
commit 72cf01cc7c
3 changed files with 33 additions and 12 deletions
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2
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -6826,7 +6826,7 @@ void SelectionDAGBuilder::visitStackmap(const CallInst &CI) {
/// \brief Lower llvm.experimental.patchpoint directly to its target opcode.
void SelectionDAGBuilder::visitPatchpoint(const CallInst &CI) {
// void|i64 @llvm.experimental.patchpoint.void|i64(i32 <id>,
// i32 <numNopBytes>,
// i32 <numBytes>,
// i8* <target>,
// i32 <numArgs>,
// [Args...],