Rip all of the global variable lowering logic out of TargetAsmInfo. Since

it is highly specific to the object file that will be generated in the end,
this introduces a new TargetLoweringObjectFile interface that is implemented
for each of ELF/MachO/COFF/Alpha/PIC16 and XCore.

Though still is still a brutal and ugly refactoring, this is a major step
towards goodness.

This patch also:
1. fixes a bunch of dangling pointer problems in the PIC16 backend.
2. disables the TargetLowering copy ctor which PIC16 was accidentally using.
3. gets us closer to xcore having its own crazy target section flags and
   pic16 not having to shadow sections with its own objects.
4. fixes wierdness where ELF targets would set CStringSection but not
   CStringSection_.  Factor the code better.
5. fixes some bugs in string lowering on ELF targets.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77294 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 2 deletions

diff --git a/lib/CodeGen/ELFWriter.cpp b/lib/CodeGen/ELFWriter.cpp
index 2679d983f4..fe2ba26244 100644
--- a/lib/CodeGen/ELFWriter.cpp
+++ b/lib/CodeGen/ELFWriter.cpp
@@ -45,6 +45,8 @@
 #include "llvm/Target/TargetAsmInfo.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetELFWriterInfo.h"
+#include "llvm/Target/TargetLowering.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/Mangler.h"
 #include "llvm/Support/Streams.h"
@@ -185,7 +187,10 @@ ELFSection &ELFWriter::getConstantPoolSection(MachineConstantPoolEntry &CPE) {
     }
   }
 
-  return getSection(TAI->getSectionForMergeableConstant(Kind)->getName(),
+  const TargetLoweringObjectFile &TLOF =
+    TM.getTargetLowering()->getObjFileLowering();
+  
+  return getSection(TLOF.getSectionForMergeableConstant(Kind)->getName(),
                     ELFSection::SHT_PROGBITS,
                     ELFSection::SHF_MERGE | ELFSection::SHF_ALLOC,
                     CPE.getAlignment());
@@ -312,8 +317,11 @@ void ELFWriter::EmitGlobal(const GlobalValue *GV) {
     assert(isa<GlobalVariable>(GV) && "GV not a global variable!");
     const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
 
+    const TargetLoweringObjectFile &TLOF =
+      TM.getTargetLowering()->getObjFileLowering();
+
     // Get ELF section from TAI
-    const Section *S = TAI->SectionForGlobal(GV);
+    const Section *S = TLOF.SectionForGlobal(GV, TM);
     unsigned SectionFlags = getElfSectionFlags(S->getKind());
 
     // The symbol align should update the section alignment if needed