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Diffstat (limited to 'lib/Target/X86/X86RegisterInfo.cpp')
-rw-r--r--lib/Target/X86/X86RegisterInfo.cpp95
1 files changed, 63 insertions, 32 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp
index a3e04b098600..98975ea01bae 100644
--- a/lib/Target/X86/X86RegisterInfo.cpp
+++ b/lib/Target/X86/X86RegisterInfo.cpp
@@ -37,7 +37,6 @@
#include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/STLExtras.h"
-#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
@@ -145,6 +144,19 @@ unsigned X86RegisterInfo::getX86RegNum(unsigned RegNo) {
case X86::XMM7: case X86::XMM15: case X86::MM7:
return 7;
+ case X86::ES:
+ return 0;
+ case X86::CS:
+ return 1;
+ case X86::SS:
+ return 2;
+ case X86::DS:
+ return 3;
+ case X86::FS:
+ return 4;
+ case X86::GS:
+ return 5;
+
default:
assert(isVirtualRegister(RegNo) && "Unknown physical register!");
llvm_unreachable("Register allocator hasn't allocated reg correctly yet!");
@@ -158,8 +170,7 @@ X86RegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A,
unsigned SubIdx) const {
switch (SubIdx) {
default: return 0;
- case 1:
- // 8-bit
+ case X86::sub_8bit:
if (B == &X86::GR8RegClass) {
if (A->getSize() == 2 || A->getSize() == 4 || A->getSize() == 8)
return A;
@@ -191,12 +202,9 @@ X86RegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A,
return &X86::GR16_NOREXRegClass;
else if (A == &X86::GR16_ABCDRegClass)
return &X86::GR16_ABCDRegClass;
- } else if (B == &X86::FR32RegClass) {
- return A;
}
break;
- case 2:
- // 8-bit hi
+ case X86::sub_8bit_hi:
if (B == &X86::GR8_ABCD_HRegClass) {
if (A == &X86::GR64RegClass || A == &X86::GR64_ABCDRegClass ||
A == &X86::GR64_NOREXRegClass ||
@@ -209,12 +217,9 @@ X86RegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A,
else if (A == &X86::GR16RegClass || A == &X86::GR16_ABCDRegClass ||
A == &X86::GR16_NOREXRegClass)
return &X86::GR16_ABCDRegClass;
- } else if (B == &X86::FR64RegClass) {
- return A;
}
break;
- case 3:
- // 16-bit
+ case X86::sub_16bit:
if (B == &X86::GR16RegClass) {
if (A->getSize() == 4 || A->getSize() == 8)
return A;
@@ -238,12 +243,9 @@ X86RegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A,
return &X86::GR32_NOREXRegClass;
else if (A == &X86::GR32_ABCDRegClass)
return &X86::GR64_ABCDRegClass;
- } else if (B == &X86::VR128RegClass) {
- return A;
}
break;
- case 4:
- // 32-bit
+ case X86::sub_32bit:
if (B == &X86::GR32RegClass || B == &X86::GR32_NOSPRegClass) {
if (A->getSize() == 8)
return A;
@@ -261,6 +263,18 @@ X86RegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A,
return &X86::GR64_ABCDRegClass;
}
break;
+ case X86::sub_ss:
+ if (B == &X86::FR32RegClass)
+ return A;
+ break;
+ case X86::sub_sd:
+ if (B == &X86::FR64RegClass)
+ return A;
+ break;
+ case X86::sub_xmm:
+ if (B == &X86::VR128RegClass)
+ return A;
+ break;
}
return 0;
}
@@ -518,6 +532,30 @@ X86RegisterInfo::getFrameIndexOffset(const MachineFunction &MF, int FI) const {
return Offset;
}
+static unsigned getSUBriOpcode(unsigned is64Bit, int64_t Imm) {
+ if (is64Bit) {
+ if (isInt<8>(Imm))
+ return X86::SUB64ri8;
+ return X86::SUB64ri32;
+ } else {
+ if (isInt<8>(Imm))
+ return X86::SUB32ri8;
+ return X86::SUB32ri;
+ }
+}
+
+static unsigned getADDriOpcode(unsigned is64Bit, int64_t Imm) {
+ if (is64Bit) {
+ if (isInt<8>(Imm))
+ return X86::ADD64ri8;
+ return X86::ADD64ri32;
+ } else {
+ if (isInt<8>(Imm))
+ return X86::ADD32ri8;
+ return X86::ADD32ri;
+ }
+}
+
void X86RegisterInfo::
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const {
@@ -537,7 +575,7 @@ eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
MachineInstr *New = 0;
if (Old->getOpcode() == getCallFrameSetupOpcode()) {
New = BuildMI(MF, Old->getDebugLoc(),
- TII.get(Is64Bit ? X86::SUB64ri32 : X86::SUB32ri),
+ TII.get(getSUBriOpcode(Is64Bit, Amount)),
StackPtr)
.addReg(StackPtr)
.addImm(Amount);
@@ -549,9 +587,7 @@ eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
Amount -= CalleeAmt;
if (Amount) {
- unsigned Opc = (Amount < 128) ?
- (Is64Bit ? X86::ADD64ri8 : X86::ADD32ri8) :
- (Is64Bit ? X86::ADD64ri32 : X86::ADD32ri);
+ unsigned Opc = getADDriOpcode(Is64Bit, Amount);
New = BuildMI(MF, Old->getDebugLoc(), TII.get(Opc), StackPtr)
.addReg(StackPtr)
.addImm(Amount);
@@ -571,9 +607,7 @@ eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
// something off the stack pointer, add it back. We do this until we have
// more advanced stack pointer tracking ability.
if (uint64_t CalleeAmt = I->getOperand(1).getImm()) {
- unsigned Opc = (CalleeAmt < 128) ?
- (Is64Bit ? X86::SUB64ri8 : X86::SUB32ri8) :
- (Is64Bit ? X86::SUB64ri32 : X86::SUB32ri);
+ unsigned Opc = getSUBriOpcode(Is64Bit, CalleeAmt);
MachineInstr *Old = I;
MachineInstr *New =
BuildMI(MF, Old->getDebugLoc(), TII.get(Opc),
@@ -691,13 +725,9 @@ void emitSPUpdate(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI,
const TargetInstrInfo &TII) {
bool isSub = NumBytes < 0;
uint64_t Offset = isSub ? -NumBytes : NumBytes;
- unsigned Opc = isSub
- ? ((Offset < 128) ?
- (Is64Bit ? X86::SUB64ri8 : X86::SUB32ri8) :
- (Is64Bit ? X86::SUB64ri32 : X86::SUB32ri))
- : ((Offset < 128) ?
- (Is64Bit ? X86::ADD64ri8 : X86::ADD32ri8) :
- (Is64Bit ? X86::ADD64ri32 : X86::ADD32ri));
+ unsigned Opc = isSub ?
+ getSUBriOpcode(Is64Bit, Offset) :
+ getADDriOpcode(Is64Bit, Offset);
uint64_t Chunk = (1LL << 31) - 1;
DebugLoc DL = MBB.findDebugLoc(MBBI);
@@ -899,7 +929,7 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
if (Is64Bit && !Fn->hasFnAttr(Attribute::NoRedZone) &&
!needsStackRealignment(MF) &&
!MFI->hasVarSizedObjects() && // No dynamic alloca.
- !MFI->hasCalls() && // No calls.
+ !MFI->adjustsStack() && // No calls.
!Subtarget->isTargetWin64()) { // Win64 has no Red Zone
uint64_t MinSize = X86FI->getCalleeSavedFrameSize();
if (HasFP) MinSize += SlotSize;
@@ -917,7 +947,8 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
// size is bigger than the callers.
if (TailCallReturnAddrDelta < 0) {
MachineInstr *MI =
- BuildMI(MBB, MBBI, DL, TII.get(Is64Bit? X86::SUB64ri32 : X86::SUB32ri),
+ BuildMI(MBB, MBBI, DL,
+ TII.get(getSUBriOpcode(Is64Bit, -TailCallReturnAddrDelta)),
StackPtr)
.addReg(StackPtr)
.addImm(-TailCallReturnAddrDelta);
@@ -1307,7 +1338,7 @@ X86RegisterInfo::getInitialFrameState(std::vector<MachineMove> &Moves) const {
// Calculate amount of bytes used for return address storing
int stackGrowth = (Is64Bit ? -8 : -4);
- // Initial state of the frame pointer is esp+4.
+ // Initial state of the frame pointer is esp+stackGrowth.
MachineLocation Dst(MachineLocation::VirtualFP);
MachineLocation Src(StackPtr, stackGrowth);
Moves.push_back(MachineMove(0, Dst, Src));
generated by cgit v1.3 (git 2.53.0) at 2026-07-31 06:50:26 +0000