maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

Allow for fixed objects to reside in the local area, and if they don't to not 

clobber them by allocating other objects in the same space!

llvm-svn: 11454
This commit is contained in:
Chris Lattner 2004-02-15 00:14:20 +00:00
parent 6a35516dcc
commit 1dfa97034d
1 changed files with 13 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
llvm/lib/CodeGen/PrologEpilogInserter.cpp
View File

@ -24,8 +24,7 @@
#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Target/TargetFrameInfo.h"
#include "llvm/Target/TargetInstrInfo.h"
namespace llvm {
using namespace llvm;
namespace {
struct PEI : public MachineFunctionPass {
@ -72,7 +71,7 @@ namespace {
/// createPrologEpilogCodeInserter - This function returns a pass that inserts
/// prolog and epilog code, and eliminates abstract frame references.
///
FunctionPass *createPrologEpilogCodeInserter() { return new PEI(); }
FunctionPass *llvm::createPrologEpilogCodeInserter() { return new PEI(); }
/// saveCallerSavedRegisters - Scan the function for modified caller saved
@ -203,8 +202,18 @@ void PEI::calculateFrameObjectOffsets(MachineFunction &Fn) {
unsigned StackAlignment = TFI.getStackAlignment();
// Start at the beginning of the local area...
// Start at the beginning of the local area.
int Offset = TFI.getOffsetOfLocalArea();
// Check to see if there are any fixed sized objects that are preallocated in
// the local area. We currently don't support filling in holes in between
// fixed sized objects, so we just skip to the end of the last fixed sized
// preallocated object.
for (int i = FFI->getObjectIndexBegin(); i != 0; ++i) {
int FixedOff = -FFI->getObjectOffset(i);
if (FixedOff > Offset) Offset = FixedOff;
}
for (unsigned i = 0, e = FFI->getObjectIndexEnd(); i != e; ++i) {
Offset += FFI->getObjectSize(i); // Allocate Size bytes...
@ -265,5 +274,3 @@ void PEI::replaceFrameIndices(MachineFunction &Fn) {
break;
}
}
} // End llvm namespace