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Allow targets to specify particular stack slots that certain physregs must

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be spilled into.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15702 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-08-12 19:01:55 +00:00
parent c330b68fb7
commit 09431e187f
1 changed files with 17 additions and 0 deletions
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17
include/llvm/Target/TargetFrameInfo.h
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@ -14,6 +14,8 @@
#ifndef LLVM_TARGET_TARGETFRAMEINFO_H
#define LLVM_TARGET_TARGETFRAMEINFO_H
#include <utility>
namespace llvm {
class MachineFunction;
@ -56,6 +58,21 @@ public:
///
int getOffsetOfLocalArea() const { return LocalAreaOffset; }
/// getCalleeSaveSpillSlots - This method returns a pointer to an array of
/// pairs, that contains an entry for each callee save register that must be
/// spilled to a particular stack location if it is spilled.
///
/// Each entry in this array contains a <register,offset> pair, indicating the
/// fixed offset from the incoming stack pointer that each register should be
/// spilled at. If a register is not listed here, the code generator is
/// allowed to spill it anywhere it chooses.
///
virtual std::pair<unsigned, int> *
getCalleeSaveSpillSlots(unsigned &NumEntries) const {
NumEntries = 0;
return 0;
}
//===--------------------------------------------------------------------===//
// These methods provide details of the stack frame used by Sparc, thus they
// are Sparc specific.