//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "mcexpr"
#include "llvm/MC/MCExpr.h"
+#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/MC/MCAsmLayout.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/Target/TargetAsmBackend.h"
using namespace llvm;
+namespace {
+namespace stats {
+STATISTIC(MCExprEvaluate, "Number of MCExpr evaluations");
+}
+}
+
void MCExpr::print(raw_ostream &OS) const {
switch (getKind()) {
case MCExpr::Target:
case MCExpr::SymbolRef: {
const MCSymbolRefExpr &SRE = cast<MCSymbolRefExpr>(*this);
const MCSymbol &Sym = SRE.getSymbol();
-
+
+ if (SRE.getKind() == MCSymbolRefExpr::VK_ARM_HI16 ||
+ SRE.getKind() == MCSymbolRefExpr::VK_ARM_LO16)
+ OS << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
+
// Parenthesize names that start with $ so that they don't look like
// absolute names.
if (Sym.getName()[0] == '$')
else
OS << Sym;
- if (SRE.getKind() != MCSymbolRefExpr::VK_None)
+ if (SRE.getKind() != MCSymbolRefExpr::VK_None &&
+ SRE.getKind() != MCSymbolRefExpr::VK_ARM_HI16 &&
+ SRE.getKind() != MCSymbolRefExpr::VK_ARM_LO16)
OS << '@' << MCSymbolRefExpr::getVariantKindName(SRE.getKind());
return;
case MCExpr::Binary: {
const MCBinaryExpr &BE = cast<MCBinaryExpr>(*this);
-
+
// Only print parens around the LHS if it is non-trivial.
if (isa<MCConstantExpr>(BE.getLHS()) || isa<MCSymbolRefExpr>(BE.getLHS())) {
OS << *BE.getLHS();
} else {
OS << '(' << *BE.getLHS() << ')';
}
-
+
switch (BE.getOpcode()) {
default: assert(0 && "Invalid opcode!");
case MCBinaryExpr::Add:
return;
}
}
-
+
OS << '+';
break;
case MCBinaryExpr::And: OS << '&'; break;
case MCBinaryExpr::Sub: OS << '-'; break;
case MCBinaryExpr::Xor: OS << '^'; break;
}
-
+
// Only print parens around the LHS if it is non-trivial.
if (isa<MCConstantExpr>(BE.getRHS()) || isa<MCSymbolRefExpr>(BE.getRHS())) {
OS << *BE.getRHS();
return Create(Ctx.GetOrCreateSymbol(Name), Kind, Ctx);
}
-const MCSymbolRefExpr *MCSymbolRefExpr::CreateTemp(StringRef Name,
- VariantKind Kind,
- MCContext &Ctx) {
- return Create(Ctx.GetOrCreateTemporarySymbol(Name), Kind, Ctx);
-}
-
StringRef MCSymbolRefExpr::getVariantKindName(VariantKind Kind) {
switch (Kind) {
default:
case VK_PLT: return "PLT";
case VK_TLSGD: return "TLSGD";
case VK_TPOFF: return "TPOFF";
+ case VK_ARM_HI16: return ":upper16:";
+ case VK_ARM_LO16: return ":lower16:";
+ case VK_TLVP: return "TLVP";
}
}
.Case("PLT", VK_PLT)
.Case("TLSGD", VK_TLSGD)
.Case("TPOFF", VK_TPOFF)
+ .Case("TLVP", VK_TLVP)
.Default(VK_Invalid);
}
bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAsmLayout *Layout) const {
MCValue Value;
-
+
+ // Fast path constants.
+ if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(this)) {
+ Res = CE->getValue();
+ return true;
+ }
+
if (!EvaluateAsRelocatable(Value, Layout) || !Value.isAbsolute())
return false;
return true;
}
-static bool EvaluateSymbolicAdd(const MCValue &LHS, const MCSymbol *RHS_A,
- const MCSymbol *RHS_B, int64_t RHS_Cst,
+static bool EvaluateSymbolicAdd(const MCValue &LHS,const MCSymbolRefExpr *RHS_A,
+ const MCSymbolRefExpr *RHS_B, int64_t RHS_Cst,
MCValue &Res) {
// We can't add or subtract two symbols.
if ((LHS.getSymA() && RHS_A) ||
(LHS.getSymB() && RHS_B))
return false;
- const MCSymbol *A = LHS.getSymA() ? LHS.getSymA() : RHS_A;
- const MCSymbol *B = LHS.getSymB() ? LHS.getSymB() : RHS_B;
+ const MCSymbolRefExpr *A = LHS.getSymA() ? LHS.getSymA() : RHS_A;
+ const MCSymbolRefExpr *B = LHS.getSymB() ? LHS.getSymB() : RHS_B;
if (B) {
// If we have a negated symbol, then we must have also have a non-negated
// symbol in order to encode the expression. We can do this check later to
bool MCExpr::EvaluateAsRelocatable(MCValue &Res,
const MCAsmLayout *Layout) const {
+ ++stats::MCExprEvaluate;
+
switch (getKind()) {
case Target:
return cast<MCTargetExpr>(this)->EvaluateAsRelocatableImpl(Res, Layout);
-
+
case Constant:
Res = MCValue::get(cast<MCConstantExpr>(this)->getValue());
return true;
case SymbolRef: {
- const MCSymbol &Sym = cast<MCSymbolRefExpr>(this)->getSymbol();
+ const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(this);
+ const MCSymbol &Sym = SRE->getSymbol();
// Evaluate recursively if this is a variable.
if (Sym.isVariable()) {
- if (!Sym.getValue()->EvaluateAsRelocatable(Res, Layout))
+ if (!Sym.getVariableValue()->EvaluateAsRelocatable(Res, Layout))
return false;
// Absolutize symbol differences between defined symbols when we have a
// layout object and the target requests it.
if (Layout && Res.getSymB() &&
Layout->getAssembler().getBackend().hasAbsolutizedSet() &&
- Res.getSymA()->isDefined() && Res.getSymB()->isDefined()) {
- MCSymbolData &A = Layout->getAssembler().getSymbolData(*Res.getSymA());
- MCSymbolData &B = Layout->getAssembler().getSymbolData(*Res.getSymB());
- Res = MCValue::get(+ A.getFragment()->getAddress() + A.getOffset()
- - B.getFragment()->getAddress() - B.getOffset()
+ Res.getSymA()->getSymbol().isDefined() &&
+ Res.getSymB()->getSymbol().isDefined()) {
+ MCSymbolData &A =
+ Layout->getAssembler().getSymbolData(Res.getSymA()->getSymbol());
+ MCSymbolData &B =
+ Layout->getAssembler().getSymbolData(Res.getSymB()->getSymbol());
+ Res = MCValue::get(+ Layout->getSymbolAddress(&A)
+ - Layout->getSymbolAddress(&B)
+ Res.getConstant());
}
return true;
}
- Res = MCValue::get(&Sym, 0, 0);
+ Res = MCValue::get(SRE, 0, 0);
return true;
}
/// -(a - b + const) ==> (b - a - const)
if (Value.getSymA() && !Value.getSymB())
return false;
- Res = MCValue::get(Value.getSymB(), Value.getSymA(),
- -Value.getConstant());
+ Res = MCValue::get(Value.getSymB(), Value.getSymA(),
+ -Value.getConstant());
break;
case MCUnaryExpr::Not:
if (!Value.isAbsolute())
return false;
- Res = MCValue::get(~Value.getConstant());
+ Res = MCValue::get(~Value.getConstant());
break;
case MCUnaryExpr::Plus:
Res = Value;
case Binary: {
const MCBinaryExpr *ABE = cast<MCBinaryExpr>(this);
MCValue LHSValue, RHSValue;
-
+
if (!ABE->getLHS()->EvaluateAsRelocatable(LHSValue, Layout) ||
!ABE->getRHS()->EvaluateAsRelocatable(RHSValue, Layout))
return false;
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