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Diffstat (limited to 'lib/Target/Alpha/AlphaRegisterInfo.cpp')
-rw-r--r--lib/Target/Alpha/AlphaRegisterInfo.cpp152
1 files changed, 21 insertions, 131 deletions
diff --git a/lib/Target/Alpha/AlphaRegisterInfo.cpp b/lib/Target/Alpha/AlphaRegisterInfo.cpp
index 327ddb4d9a72..7667fd831d1a 100644
--- a/lib/Target/Alpha/AlphaRegisterInfo.cpp
+++ b/lib/Target/Alpha/AlphaRegisterInfo.cpp
@@ -22,7 +22,7 @@
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineLocation.h"
-#include "llvm/Target/TargetFrameInfo.h"
+#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetInstrInfo.h"
@@ -35,29 +35,21 @@
#include <cstdlib>
using namespace llvm;
-//These describe LDAx
-static const int IMM_LOW = -32768;
-static const int IMM_HIGH = 32767;
-static const int IMM_MULT = 65536;
+AlphaRegisterInfo::AlphaRegisterInfo(const TargetInstrInfo &tii)
+ : AlphaGenRegisterInfo(Alpha::ADJUSTSTACKDOWN, Alpha::ADJUSTSTACKUP),
+ TII(tii) {
+}
-static long getUpper16(long l)
-{
- long y = l / IMM_MULT;
- if (l % IMM_MULT > IMM_HIGH)
+static long getUpper16(long l) {
+ long y = l / Alpha::IMM_MULT;
+ if (l % Alpha::IMM_MULT > Alpha::IMM_HIGH)
++y;
return y;
}
-static long getLower16(long l)
-{
+static long getLower16(long l) {
long h = getUpper16(l);
- return l - h * IMM_MULT;
-}
-
-AlphaRegisterInfo::AlphaRegisterInfo(const TargetInstrInfo &tii)
- : AlphaGenRegisterInfo(Alpha::ADJUSTSTACKDOWN, Alpha::ADJUSTSTACKUP),
- TII(tii), curgpdist(0)
-{
+ return l - h * Alpha::IMM_MULT;
}
const unsigned* AlphaRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)
@@ -86,19 +78,12 @@ BitVector AlphaRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
// Stack Frame Processing methods
//===----------------------------------------------------------------------===//
-// hasFP - Return true if the specified function should have a dedicated frame
-// pointer register. This is true if the function has variable sized allocas or
-// if frame pointer elimination is disabled.
-//
-bool AlphaRegisterInfo::hasFP(const MachineFunction &MF) const {
- const MachineFrameInfo *MFI = MF.getFrameInfo();
- return MFI->hasVarSizedObjects();
-}
-
void AlphaRegisterInfo::
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const {
- if (hasFP(MF)) {
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
+
+ if (TFI->hasFP(MF)) {
// If we have a frame pointer, turn the adjcallstackup instruction into a
// 'sub ESP, <amt>' and the adjcallstackdown instruction into 'add ESP,
// <amt>'
@@ -108,7 +93,7 @@ eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
// We need to keep the stack aligned properly. To do this, we round the
// amount of space needed for the outgoing arguments up to the next
// alignment boundary.
- unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment();
+ unsigned Align = TFI->getStackAlignment();
Amount = (Amount+Align-1)/Align*Align;
MachineInstr *New;
@@ -146,7 +131,9 @@ AlphaRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
MachineInstr &MI = *II;
MachineBasicBlock &MBB = *MI.getParent();
MachineFunction &MF = *MBB.getParent();
- bool FP = hasFP(MF);
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
+
+ bool FP = TFI->hasFP(MF);
while (!MI.getOperand(i).isFI()) {
++i;
@@ -168,7 +155,7 @@ AlphaRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
DEBUG(errs() << "Corrected Offset " << Offset
<< " for stack size: " << MF.getFrameInfo()->getStackSize() << "\n");
- if (Offset > IMM_HIGH || Offset < IMM_LOW) {
+ if (Offset > Alpha::IMM_HIGH || Offset < Alpha::IMM_LOW) {
DEBUG(errs() << "Unconditionally using R28 for evil purposes Offset: "
<< Offset << "\n");
//so in this case, we need to use a temporary register, and move the
@@ -186,111 +173,14 @@ AlphaRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
}
}
-
-void AlphaRegisterInfo::emitPrologue(MachineFunction &MF) const {
- MachineBasicBlock &MBB = MF.front(); // Prolog goes in entry BB
- MachineBasicBlock::iterator MBBI = MBB.begin();
- MachineFrameInfo *MFI = MF.getFrameInfo();
- DebugLoc dl = (MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc());
- bool FP = hasFP(MF);
-
- //handle GOP offset
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAHg), Alpha::R29)
- .addGlobalAddress(MF.getFunction())
- .addReg(Alpha::R27).addImm(++curgpdist);
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAg), Alpha::R29)
- .addGlobalAddress(MF.getFunction())
- .addReg(Alpha::R29).addImm(curgpdist);
-
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::ALTENT))
- .addGlobalAddress(MF.getFunction());
-
- // Get the number of bytes to allocate from the FrameInfo
- long NumBytes = MFI->getStackSize();
-
- if (FP)
- NumBytes += 8; //reserve space for the old FP
-
- // Do we need to allocate space on the stack?
- if (NumBytes == 0) return;
-
- unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment();
- NumBytes = (NumBytes+Align-1)/Align*Align;
-
- // Update frame info to pretend that this is part of the stack...
- MFI->setStackSize(NumBytes);
-
- // adjust stack pointer: r30 -= numbytes
- NumBytes = -NumBytes;
- if (NumBytes >= IMM_LOW) {
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes)
- .addReg(Alpha::R30);
- } else if (getUpper16(NumBytes) >= IMM_LOW) {
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAH), Alpha::R30)
- .addImm(getUpper16(NumBytes)).addReg(Alpha::R30);
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30)
- .addImm(getLower16(NumBytes)).addReg(Alpha::R30);
- } else {
- report_fatal_error("Too big a stack frame at " + Twine(NumBytes));
- }
-
- //now if we need to, save the old FP and set the new
- if (FP)
- {
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::STQ))
- .addReg(Alpha::R15).addImm(0).addReg(Alpha::R30);
- //this must be the last instr in the prolog
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::BISr), Alpha::R15)
- .addReg(Alpha::R30).addReg(Alpha::R30);
- }
-
-}
-
-void AlphaRegisterInfo::emitEpilogue(MachineFunction &MF,
- MachineBasicBlock &MBB) const {
- const MachineFrameInfo *MFI = MF.getFrameInfo();
- MachineBasicBlock::iterator MBBI = prior(MBB.end());
- assert((MBBI->getOpcode() == Alpha::RETDAG ||
- MBBI->getOpcode() == Alpha::RETDAGp)
- && "Can only insert epilog into returning blocks");
- DebugLoc dl = MBBI->getDebugLoc();
-
- bool FP = hasFP(MF);
-
- // Get the number of bytes allocated from the FrameInfo...
- long NumBytes = MFI->getStackSize();
-
- //now if we need to, restore the old FP
- if (FP) {
- //copy the FP into the SP (discards allocas)
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::BISr), Alpha::R30).addReg(Alpha::R15)
- .addReg(Alpha::R15);
- //restore the FP
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDQ), Alpha::R15)
- .addImm(0).addReg(Alpha::R15);
- }
-
- if (NumBytes != 0) {
- if (NumBytes <= IMM_HIGH) {
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes)
- .addReg(Alpha::R30);
- } else if (getUpper16(NumBytes) <= IMM_HIGH) {
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAH), Alpha::R30)
- .addImm(getUpper16(NumBytes)).addReg(Alpha::R30);
- BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30)
- .addImm(getLower16(NumBytes)).addReg(Alpha::R30);
- } else {
- report_fatal_error("Too big a stack frame at " + Twine(NumBytes));
- }
- }
-}
-
unsigned AlphaRegisterInfo::getRARegister() const {
return Alpha::R26;
}
unsigned AlphaRegisterInfo::getFrameRegister(const MachineFunction &MF) const {
- return hasFP(MF) ? Alpha::R15 : Alpha::R30;
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
+
+ return TFI->hasFP(MF) ? Alpha::R15 : Alpha::R30;
}
unsigned AlphaRegisterInfo::getEHExceptionRegister() const {
generated by cgit v1.3 (git 2.53.0) at 2026-07-28 11:06:10 +0000