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prep work to support a future where getJumpTableInfo will return

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a null pointer for functions with no jump tables.  No functionality
change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94469 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-01-25 23:22:00 +00:00
parent da63b3ad63
commit b1e803985d
4 changed files with 11 additions and 4 deletions
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lib/CodeGen/ELFCodeEmitter.cpp
+4 -3
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@@ -62,7 +62,8 @@ void ELFCodeEmitter::startFunction(MachineFunction &MF) {
// They need to be emitted before the function because in some targets
// the later may reference JT or CP entry address.
emitConstantPool(MF.getConstantPool());
emitJumpTables(MF.getJumpTableInfo());
if (MF.getJumpTableInfo())
emitJumpTables(MF.getJumpTableInfo());
}
/// finishFunction - This callback is invoked after the function is completely
@@ -84,7 +85,7 @@ bool ELFCodeEmitter::finishFunction(MachineFunction &MF) {
// Patch up Jump Table Section relocations to use the real MBBs offsets
// now that the MBB label offsets inside the function are known.
if (!MF.getJumpTableInfo()->isEmpty()) {
if (MF.getJumpTableInfo()) {
ELFSection &JTSection = EW.getJumpTableSection();
for (std::vector<MachineRelocation>::iterator MRI = JTRelocations.begin(),
MRE = JTRelocations.end(); MRI != MRE; ++MRI) {
@@ -172,7 +173,7 @@ void ELFCodeEmitter::emitJumpTables(MachineJumpTableInfo *MJTI) {
"PIC codegen not yet handled for elf jump tables!");
const TargetELFWriterInfo *TEW = TM.getELFWriterInfo();
unsigned EntrySize = MJTI->getEntrySize();
unsigned EntrySize = 4; //MJTI->getEntrySize();
// Get the ELF Section to emit the jump table
ELFSection &JTSection = EW.getJumpTableSection();