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-rw-r--r--lib/Target/X86/X86MCInstLower.cpp114
1 files changed, 56 insertions, 58 deletions
diff --git a/lib/Target/X86/X86MCInstLower.cpp b/lib/Target/X86/X86MCInstLower.cpp
index 1c2ef25..5a1e1b8 100644
--- a/lib/Target/X86/X86MCInstLower.cpp
+++ b/lib/Target/X86/X86MCInstLower.cpp
@@ -12,23 +12,48 @@
//
//===----------------------------------------------------------------------===//
-#include "X86MCInstLower.h"
#include "X86AsmPrinter.h"
-#include "X86COFFMachineModuleInfo.h"
#include "InstPrinter/X86ATTInstPrinter.h"
-#include "llvm/Type.h"
+#include "X86COFFMachineModuleInfo.h"
+#include "llvm/ADT/SmallString.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/IR/Type.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstBuilder.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/Target/Mangler.h"
#include "llvm/Support/FormattedStream.h"
-#include "llvm/ADT/SmallString.h"
+#include "llvm/Target/Mangler.h"
using namespace llvm;
+namespace {
+
+/// X86MCInstLower - This class is used to lower an MachineInstr into an MCInst.
+class X86MCInstLower {
+ MCContext &Ctx;
+ Mangler *Mang;
+ const MachineFunction &MF;
+ const TargetMachine &TM;
+ const MCAsmInfo &MAI;
+ X86AsmPrinter &AsmPrinter;
+public:
+ X86MCInstLower(Mangler *mang, const MachineFunction &MF,
+ X86AsmPrinter &asmprinter);
+
+ void Lower(const MachineInstr *MI, MCInst &OutMI) const;
+
+ MCSymbol *GetSymbolFromOperand(const MachineOperand &MO) const;
+ MCOperand LowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const;
+
+private:
+ MachineModuleInfoMachO &getMachOMMI() const;
+};
+
+} // end anonymous namespace
+
X86MCInstLower::X86MCInstLower(Mangler *mang, const MachineFunction &mf,
X86AsmPrinter &asmprinter)
: Ctx(mf.getContext()), Mang(mang), MF(mf), TM(mf.getTarget()),
@@ -43,15 +68,11 @@ MachineModuleInfoMachO &X86MCInstLower::getMachOMMI() const {
/// operand to an MCSymbol.
MCSymbol *X86MCInstLower::
GetSymbolFromOperand(const MachineOperand &MO) const {
- assert((MO.isGlobal() || MO.isSymbol()) && "Isn't a symbol reference");
+ assert((MO.isGlobal() || MO.isSymbol() || MO.isMBB()) && "Isn't a symbol reference");
SmallString<128> Name;
- if (!MO.isGlobal()) {
- assert(MO.isSymbol());
- Name += MAI.getGlobalPrefix();
- Name += MO.getSymbolName();
- } else {
+ if (MO.isGlobal()) {
const GlobalValue *GV = MO.getGlobal();
bool isImplicitlyPrivate = false;
if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB ||
@@ -61,6 +82,11 @@ GetSymbolFromOperand(const MachineOperand &MO) const {
isImplicitlyPrivate = true;
Mang->getNameWithPrefix(Name, GV, isImplicitlyPrivate);
+ } else if (MO.isSymbol()) {
+ Name += MAI.getGlobalPrefix();
+ Name += MO.getSymbolName();
+ } else if (MO.isMBB()) {
+ Name += MO.getMBB()->getSymbol()->getName();
}
// If the target flags on the operand changes the name of the symbol, do that
@@ -191,7 +217,7 @@ MCOperand X86MCInstLower::LowerSymbolOperand(const MachineOperand &MO,
if (Expr == 0)
Expr = MCSymbolRefExpr::Create(Sym, RefKind, Ctx);
- if (!MO.isJTI() && MO.getOffset())
+ if (!MO.isJTI() && !MO.isMBB() && MO.getOffset())
Expr = MCBinaryExpr::CreateAdd(Expr,
MCConstantExpr::Create(MO.getOffset(), Ctx),
Ctx);
@@ -324,9 +350,6 @@ void X86MCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
MCOp = MCOperand::CreateImm(MO.getImm());
break;
case MachineOperand::MO_MachineBasicBlock:
- MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create(
- MO.getMBB()->getSymbol(), Ctx));
- break;
case MachineOperand::MO_GlobalAddress:
case MachineOperand::MO_ExternalSymbol:
MCOp = LowerSymbolOperand(MO, GetSymbolFromOperand(MO));
@@ -371,10 +394,6 @@ ReSimplify:
case X86::MOVZX64rm8: LowerSubReg32_Op0(OutMI, X86::MOVZX32rm8); break;
case X86::MOVZX64rr16: LowerSubReg32_Op0(OutMI, X86::MOVZX32rr16); break;
case X86::MOVZX64rm16: LowerSubReg32_Op0(OutMI, X86::MOVZX32rm16); break;
- case X86::SETB_C8r: LowerUnaryToTwoAddr(OutMI, X86::SBB8rr); break;
- case X86::SETB_C16r: LowerUnaryToTwoAddr(OutMI, X86::SBB16rr); break;
- case X86::SETB_C32r: LowerUnaryToTwoAddr(OutMI, X86::SBB32rr); break;
- case X86::SETB_C64r: LowerUnaryToTwoAddr(OutMI, X86::SBB64rr); break;
case X86::MOV8r0: LowerUnaryToTwoAddr(OutMI, X86::XOR8rr); break;
case X86::MOV32r0: LowerUnaryToTwoAddr(OutMI, X86::XOR32rr); break;
@@ -531,18 +550,14 @@ ReSimplify:
OutMI.setOpcode(X86::RET);
break;
- case X86::MORESTACK_RET_RESTORE_R10: {
- MCInst retInst;
-
+ case X86::MORESTACK_RET_RESTORE_R10:
OutMI.setOpcode(X86::MOV64rr);
OutMI.addOperand(MCOperand::CreateReg(X86::R10));
OutMI.addOperand(MCOperand::CreateReg(X86::RAX));
- retInst.setOpcode(X86::RET);
- AsmPrinter.OutStreamer.EmitInstruction(retInst);
+ AsmPrinter.OutStreamer.EmitInstruction(MCInstBuilder(X86::RET));
break;
}
- }
}
static void LowerTlsAddr(MCStreamer &OutStreamer,
@@ -556,11 +571,8 @@ static void LowerTlsAddr(MCStreamer &OutStreamer,
MCContext &context = OutStreamer.getContext();
- if (needsPadding) {
- MCInst prefix;
- prefix.setOpcode(X86::DATA16_PREFIX);
- OutStreamer.EmitInstruction(prefix);
- }
+ if (needsPadding)
+ OutStreamer.EmitInstruction(MCInstBuilder(X86::DATA16_PREFIX));
MCSymbolRefExpr::VariantKind SRVK;
switch (MI.getOpcode()) {
@@ -610,20 +622,11 @@ static void LowerTlsAddr(MCStreamer &OutStreamer,
OutStreamer.EmitInstruction(LEA);
if (needsPadding) {
- MCInst prefix;
- prefix.setOpcode(X86::DATA16_PREFIX);
- OutStreamer.EmitInstruction(prefix);
- prefix.setOpcode(X86::DATA16_PREFIX);
- OutStreamer.EmitInstruction(prefix);
- prefix.setOpcode(X86::REX64_PREFIX);
- OutStreamer.EmitInstruction(prefix);
+ OutStreamer.EmitInstruction(MCInstBuilder(X86::DATA16_PREFIX));
+ OutStreamer.EmitInstruction(MCInstBuilder(X86::DATA16_PREFIX));
+ OutStreamer.EmitInstruction(MCInstBuilder(X86::REX64_PREFIX));
}
- MCInst call;
- if (is64Bits)
- call.setOpcode(X86::CALL64pcrel32);
- else
- call.setOpcode(X86::CALLpcrel32);
StringRef name = is64Bits ? "__tls_get_addr" : "___tls_get_addr";
MCSymbol *tlsGetAddr = context.GetOrCreateSymbol(name);
const MCSymbolRefExpr *tlsRef =
@@ -631,8 +634,9 @@ static void LowerTlsAddr(MCStreamer &OutStreamer,
MCSymbolRefExpr::VK_PLT,
context);
- call.addOperand(MCOperand::CreateExpr(tlsRef));
- OutStreamer.EmitInstruction(call);
+ OutStreamer.EmitInstruction(MCInstBuilder(is64Bits ? X86::CALL64pcrel32
+ : X86::CALLpcrel32)
+ .addExpr(tlsRef));
}
void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
@@ -676,7 +680,6 @@ void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
return LowerTlsAddr(OutStreamer, MCInstLowering, *MI);
case X86::MOVPC32r: {
- MCInst TmpInst;
// This is a pseudo op for a two instruction sequence with a label, which
// looks like:
// call "L1$pb"
@@ -685,20 +688,17 @@ void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
// Emit the call.
MCSymbol *PICBase = MF->getPICBaseSymbol();
- TmpInst.setOpcode(X86::CALLpcrel32);
// FIXME: We would like an efficient form for this, so we don't have to do a
// lot of extra uniquing.
- TmpInst.addOperand(MCOperand::CreateExpr(MCSymbolRefExpr::Create(PICBase,
- OutContext)));
- OutStreamer.EmitInstruction(TmpInst);
+ OutStreamer.EmitInstruction(MCInstBuilder(X86::CALLpcrel32)
+ .addExpr(MCSymbolRefExpr::Create(PICBase, OutContext)));
// Emit the label.
OutStreamer.EmitLabel(PICBase);
// popl $reg
- TmpInst.setOpcode(X86::POP32r);
- TmpInst.getOperand(0) = MCOperand::CreateReg(MI->getOperand(0).getReg());
- OutStreamer.EmitInstruction(TmpInst);
+ OutStreamer.EmitInstruction(MCInstBuilder(X86::POP32r)
+ .addReg(MI->getOperand(0).getReg()));
return;
}
@@ -728,12 +728,10 @@ void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
DotExpr = MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(OpSym,OutContext),
DotExpr, OutContext);
- MCInst TmpInst;
- TmpInst.setOpcode(X86::ADD32ri);
- TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
- TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
- TmpInst.addOperand(MCOperand::CreateExpr(DotExpr));
- OutStreamer.EmitInstruction(TmpInst);
+ OutStreamer.EmitInstruction(MCInstBuilder(X86::ADD32ri)
+ .addReg(MI->getOperand(0).getReg())
+ .addReg(MI->getOperand(1).getReg())
+ .addExpr(DotExpr));
return;
}
}
generated by cgit v1.1 at 2025-11-10 20:27:11 +0000