Remove "JumpTableDataSection" from TAI, instead, have AsmPrinter

compute it based on what it knows.  As part of this, rename getSectionForMergeableConstant
to getSectionForConstant because it works for non-mergable constants also.

The only functionality change from this is that Xcore will start dropping
its jump tables into readonly section instead of data section in -static mode.
This should be fine as the linker resolves the relocations.  If this is a
problem, let me know and we'll come up with another solution.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77833 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/ELFWriter.cpp

@@ -178,7 +178,13 @@ void ELFWriter::addExternalSymbol(const char *External) {
 // Get jump table section on the section name returned by TAI
 ELFSection &ELFWriter::getJumpTableSection() {
   unsigned Align = TM.getTargetData()->getPointerABIAlignment();
-  return getSection(TAI->getJumpTableDataSection(),
+  
+  const TargetLoweringObjectFile &TLOF =
+    TM.getTargetLowering()->getObjFileLowering();
+
+  return getSection(TLOF.getSectionForConstant(
+                                      SectionKind::get(SectionKind::ReadOnly))
+                    ->getName(),
                     ELFSection::SHT_PROGBITS,
                     ELFSection::SHF_ALLOC, Align);
 }
@@ -204,7 +210,7 @@ ELFSection &ELFWriter::getConstantPoolSection(MachineConstantPoolEntry &CPE) {
   const TargetLoweringObjectFile &TLOF =
     TM.getTargetLowering()->getObjFileLowering();
 
-  return getSection(TLOF.getSectionForMergeableConstant(Kind)->getName(),
+  return getSection(TLOF.getSectionForConstant(Kind)->getName(),
                     ELFSection::SHT_PROGBITS,
                     ELFSection::SHF_MERGE | ELFSection::SHF_ALLOC,
                     CPE.getAlignment());