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Move isDSOLocal check and add a comment.

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llvm-svn: 316920
This commit is contained in:
Rafael Espindola 2017-10-30 16:32:31 +00:00
parent 52eea02d9d
commit 6b525c8f51
1 changed files with 12 additions and 2 deletions
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14
lib/Target/TargetMachine.cpp
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@ -114,6 +114,17 @@ static TLSModel::Model getSelectedTLSModel(const GlobalValue *GV) {
bool TargetMachine::shouldAssumeDSOLocal(const Module &M,
const GlobalValue *GV) const {
// If the IR producer requested that this GV be treated as dso local, obey.
if (GV && GV->isDSOLocal())
return true;
// According to the llvm language reference, we should be able to just return
// false in here if we have a GV, as we know it is dso_preemptable.
// At this point in time, the various IR producers have not been transitioned
// to always produce a dso_local when it is possible to do so. As a result we
// still have some pre-dso_local logic in here to improve the quality of the
// generated code:
Reloc::Model RM = getRelocationModel();
const Triple &TT = getTargetTriple();
@ -137,8 +148,7 @@ bool TargetMachine::shouldAssumeDSOLocal(const Module &M,
GV->hasExternalWeakLinkage())
return false;
if (GV && (GV->hasLocalLinkage() || !GV->hasDefaultVisibility() ||
GV->isDSOLocal()))
if (GV && (GV->hasLocalLinkage() || !GV->hasDefaultVisibility()))
return true;
if (TT.isOSBinFormatMachO()) {