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Bring back the ability opt out of padding zero-byte functions by not providing a nop instruction. 

Summary: No test case since I'm not aware of an in-tree target that needs this.

Reviewers: hans

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D32398

llvm-svn: 301311
This commit is contained in:
Daniel Sanders 2017-04-25 14:27:27 +00:00
parent 5bf767c548
commit 11e78c2bff
1 changed files with 7 additions and 2 deletions
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9
llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@ -1068,8 +1068,13 @@ void AsmPrinter::EmitFunctionBody() {
(TT.isOSWindows() && TT.isOSBinFormatCOFF()))) {
MCInst Noop;
MF->getSubtarget().getInstrInfo()->getNoop(Noop);
OutStreamer->AddComment("avoids zero-length function");
OutStreamer->EmitInstruction(Noop, getSubtargetInfo());
// Targets can opt-out of emitting the noop here by leaving the opcode
// unspecified.
if (Noop.getOpcode()) {
OutStreamer->AddComment("avoids zero-length function");
OutStreamer->EmitInstruction(Noop, getSubtargetInfo());
}
}
const Function *F = MF->getFunction();