[X86] Use ".lrodata" prefix for large mergeable constants (#81900)

Otherwise with a small enough large-data-threshold, we can get .rodata.*
sections marked large, making .rodata large in the final binary.

1 files changed, 7 insertions, 6 deletions

diff --git a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index 2c5b0b3..3cf59bc 100644
--- a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -635,7 +635,8 @@ static SmallString<128>
 getELFSectionNameForGlobal(const GlobalObject *GO, SectionKind Kind,
                            Mangler &Mang, const TargetMachine &TM,
                            unsigned EntrySize, bool UniqueSectionName) {
-  SmallString<128> Name;
+  SmallString<128> Name =
+      getSectionPrefixForGlobal(Kind, TM.isLargeGlobalValue(GO));
   if (Kind.isMergeableCString()) {
     // We also need alignment here.
     // FIXME: this is getting the alignment of the character, not the
@@ -643,13 +644,13 @@ getELFSectionNameForGlobal(const GlobalObject *GO, SectionKind Kind,
     Align Alignment = GO->getParent()->getDataLayout().getPreferredAlign(
         cast<GlobalVariable>(GO));
 
-    std::string SizeSpec = ".rodata.str" + utostr(EntrySize) + ".";
-    Name = SizeSpec + utostr(Alignment.value());
+    Name += ".str";
+    Name += utostr(EntrySize);
+    Name += ".";
+    Name += utostr(Alignment.value());
   } else if (Kind.isMergeableConst()) {
-    Name = ".rodata.cst";
+    Name += ".cst";
     Name += utostr(EntrySize);
-  } else {
-    Name = getSectionPrefixForGlobal(Kind, TM.isLargeGlobalValue(GO));
   }
 
   bool HasPrefix = false;