First step of huge frame-related refactoring: move emit{Prologue,Epilogue} out of TargetRegisterInfo to TargetFrameInfo, which is definitely much better suitable place
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119097 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/Alpha.h b/lib/Target/Alpha/Alpha.h
index 5cf4866..2c359da 100644
--- a/lib/Target/Alpha/Alpha.h
+++ b/lib/Target/Alpha/Alpha.h
@@ -18,6 +18,13 @@
#include "llvm/Target/TargetMachine.h"
namespace llvm {
+ namespace Alpha {
+ // These describe LDAx
+
+ static const int IMM_LOW = -32768;
+ static const int IMM_HIGH = 32767;
+ static const int IMM_MULT = 65536;
+ }
class AlphaTargetMachine;
class FunctionPass;
diff --git a/lib/Target/Alpha/AlphaFrameInfo.cpp b/lib/Target/Alpha/AlphaFrameInfo.cpp
new file mode 100644
index 0000000..601e5db
--- /dev/null
+++ b/lib/Target/Alpha/AlphaFrameInfo.cpp
@@ -0,0 +1,140 @@
+//=====- AlphaFrameInfo.cpp - Alpha Frame Information ----------*- C++ -*-====//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the Alpha implementation of TargetFrameInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "AlphaFrameInfo.h"
+#include "AlphaInstrInfo.h"
+#include "AlphaMachineFunctionInfo.h"
+#include "llvm/Function.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/ADT/Twine.h"
+
+using namespace llvm;
+
+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) {
+ long h = getUpper16(l);
+ return l - h * Alpha::IMM_MULT;
+}
+
+void AlphaFrameInfo::emitPrologue(MachineFunction &MF) const {
+ MachineBasicBlock &MBB = MF.front(); // Prolog goes in entry BB
+ MachineBasicBlock::iterator MBBI = MBB.begin();
+ MachineFrameInfo *MFI = MF.getFrameInfo();
+ const AlphaRegisterInfo *RegInfo =
+ static_cast<const AlphaRegisterInfo*>(MF.getTarget().getRegisterInfo());
+ const AlphaInstrInfo &TII =
+ *static_cast<const AlphaInstrInfo*>(MF.getTarget().getInstrInfo());
+
+ DebugLoc dl = (MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc());
+ bool FP = RegInfo->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 = 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 >= Alpha::IMM_LOW) {
+ BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes)
+ .addReg(Alpha::R30);
+ } else if (getUpper16(NumBytes) >= Alpha::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 AlphaFrameInfo::emitEpilogue(MachineFunction &MF,
+ MachineBasicBlock &MBB) const {
+ const MachineFrameInfo *MFI = MF.getFrameInfo();
+ MachineBasicBlock::iterator MBBI = prior(MBB.end());
+ const AlphaRegisterInfo *RegInfo =
+ static_cast<const AlphaRegisterInfo*>(MF.getTarget().getRegisterInfo());
+ const AlphaInstrInfo &TII =
+ *static_cast<const AlphaInstrInfo*>(MF.getTarget().getInstrInfo());
+
+ assert((MBBI->getOpcode() == Alpha::RETDAG ||
+ MBBI->getOpcode() == Alpha::RETDAGp)
+ && "Can only insert epilog into returning blocks");
+ DebugLoc dl = MBBI->getDebugLoc();
+
+ bool FP = RegInfo->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 <= Alpha::IMM_HIGH) {
+ BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes)
+ .addReg(Alpha::R30);
+ } else if (getUpper16(NumBytes) <= Alpha::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));
+ }
+ }
+}
diff --git a/lib/Target/Alpha/AlphaFrameInfo.h b/lib/Target/Alpha/AlphaFrameInfo.h
new file mode 100644
index 0000000..df23523
--- /dev/null
+++ b/lib/Target/Alpha/AlphaFrameInfo.h
@@ -0,0 +1,41 @@
+//===--- AlphaFrameInfo.h - Define TargetFrameInfo for Alpha --*- C++ -*---===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ALPHA_FRAMEINFO_H
+#define ALPHA_FRAMEINFO_H
+
+#include "Alpha.h"
+#include "AlphaSubtarget.h"
+#include "llvm/Target/TargetFrameInfo.h"
+
+namespace llvm {
+ class AlphaSubtarget;
+
+class AlphaFrameInfo : public TargetFrameInfo {
+ const AlphaSubtarget &STI;
+ // FIXME: This should end in MachineFunctionInfo, not here!
+ mutable int curgpdist;
+public:
+ explicit AlphaFrameInfo(const AlphaSubtarget &sti)
+ : TargetFrameInfo(StackGrowsDown, 16, 0), STI(sti), curgpdist(0) {
+ }
+
+ /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
+ /// the function.
+ void emitPrologue(MachineFunction &MF) const;
+ void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
+};
+
+} // End llvm namespace
+
+#endif
diff --git a/lib/Target/Alpha/AlphaRegisterInfo.cpp b/lib/Target/Alpha/AlphaRegisterInfo.cpp
index 327ddb4..001922d 100644
--- a/lib/Target/Alpha/AlphaRegisterInfo.cpp
+++ b/lib/Target/Alpha/AlphaRegisterInfo.cpp
@@ -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)
@@ -168,7 +160,7 @@
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
@@ -186,105 +178,6 @@
}
}
-
-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;
}
diff --git a/lib/Target/Alpha/AlphaRegisterInfo.h b/lib/Target/Alpha/AlphaRegisterInfo.h
index b164979..9ff4175 100644
--- a/lib/Target/Alpha/AlphaRegisterInfo.h
+++ b/lib/Target/Alpha/AlphaRegisterInfo.h
@@ -41,11 +41,6 @@
void eliminateFrameIndex(MachineBasicBlock::iterator II,
int SPAdj, RegScavenger *RS = NULL) const;
- //void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
-
- void emitPrologue(MachineFunction &MF) const;
- void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
-
// Debug information queries.
unsigned getRARegister() const;
unsigned getFrameRegister(const MachineFunction &MF) const;
@@ -57,9 +52,6 @@
int getDwarfRegNum(unsigned RegNum, bool isEH) const;
static std::string getPrettyName(unsigned reg);
-
-private:
- mutable int curgpdist;
};
} // end namespace llvm
diff --git a/lib/Target/Alpha/AlphaTargetMachine.cpp b/lib/Target/Alpha/AlphaTargetMachine.cpp
index cfc8b35..ee194d9 100644
--- a/lib/Target/Alpha/AlphaTargetMachine.cpp
+++ b/lib/Target/Alpha/AlphaTargetMachine.cpp
@@ -28,7 +28,7 @@
const std::string &FS)
: LLVMTargetMachine(T, TT),
DataLayout("e-f128:128:128-n64"),
- FrameInfo(TargetFrameInfo::StackGrowsDown, 16, 0),
+ FrameInfo(Subtarget),
Subtarget(TT, FS),
TLInfo(*this),
TSInfo(*this) {
diff --git a/lib/Target/Alpha/AlphaTargetMachine.h b/lib/Target/Alpha/AlphaTargetMachine.h
index d416d54..43b7070 100644
--- a/lib/Target/Alpha/AlphaTargetMachine.h
+++ b/lib/Target/Alpha/AlphaTargetMachine.h
@@ -14,13 +14,14 @@
#ifndef ALPHA_TARGETMACHINE_H
#define ALPHA_TARGETMACHINE_H
+#include "AlphaInstrInfo.h"
+#include "AlphaISelLowering.h"
+#include "AlphaFrameInfo.h"
+#include "AlphaSelectionDAGInfo.h"
+#include "AlphaSubtarget.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetFrameInfo.h"
-#include "AlphaInstrInfo.h"
-#include "AlphaISelLowering.h"
-#include "AlphaSelectionDAGInfo.h"
-#include "AlphaSubtarget.h"
namespace llvm {
@@ -29,7 +30,7 @@
class AlphaTargetMachine : public LLVMTargetMachine {
const TargetData DataLayout; // Calculates type size & alignment
AlphaInstrInfo InstrInfo;
- TargetFrameInfo FrameInfo;
+ AlphaFrameInfo FrameInfo;
AlphaSubtarget Subtarget;
AlphaTargetLowering TLInfo;
AlphaSelectionDAGInfo TSInfo;