Avoid an infinite cycle with private linkage and -f{data|function}-sections.

When outputting an object we check its section to find its name, but when
looking for the section with -ffunction-section we look for the symbol name.

Break the loop by requesting a name with the private prefix when constructing
the section name. This matches the behavior before r201608.

llvm-svn: 201622

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/TargetLoweringBase.cpp b/llvm/lib/CodeGen/TargetLoweringBase.cpp
index a0ea3b3ba3b..d3c42be5e6c 100644
--- a/llvm/lib/CodeGen/TargetLoweringBase.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringBase.cpp
@@ -1431,8 +1431,9 @@ bool TargetLoweringBase::isLegalAddressingMode(const AddrMode &AM,
 
 void TargetLoweringBase::getNameWithPrefix(SmallVectorImpl<char> &Name,
                                            const GlobalValue *GV,
-                                           Mangler &Mang) const {
-  if (!GV->hasPrivateLinkage()) {
+                                           Mangler &Mang,
+                                           bool MayAlwaysUsePrivate) const {
+  if (MayAlwaysUsePrivate || !GV->hasPrivateLinkage()) {
     // Simple case: If GV is not private, it is not important to find out if
     // private labels are legal in this case or not.
     Mang.getNameWithPrefix(Name, GV, false);