#include "llvm/IR/DataLayout.h"
#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/Triple.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Module.h"
// DataLayout Class Implementation
//===----------------------------------------------------------------------===//
+const char *DataLayout::getManglingComponent(const Triple &T) {
+ if (T.isOSBinFormatMachO())
+ return "-m:o";
+ if (T.isOSBinFormatELF() || T.isArch64Bit())
+ return "-m:e";
+ assert(T.isOSBinFormatCOFF());
+ return "-m:c";
+}
+
+static const LayoutAlignElem DefaultAlignments[] = {
+ { INTEGER_ALIGN, 1, 1, 1 }, // i1
+ { INTEGER_ALIGN, 8, 1, 1 }, // i8
+ { INTEGER_ALIGN, 16, 2, 2 }, // i16
+ { INTEGER_ALIGN, 32, 4, 4 }, // i32
+ { INTEGER_ALIGN, 64, 4, 8 }, // i64
+ { FLOAT_ALIGN, 16, 2, 2 }, // half
+ { FLOAT_ALIGN, 32, 4, 4 }, // float
+ { FLOAT_ALIGN, 64, 8, 8 }, // double
+ { FLOAT_ALIGN, 128, 16, 16 }, // ppcf128, quad, ...
+ { VECTOR_ALIGN, 64, 8, 8 }, // v2i32, v1i64, ...
+ { VECTOR_ALIGN, 128, 16, 16 }, // v16i8, v8i16, v4i32, ...
+ { AGGREGATE_ALIGN, 0, 0, 8 } // struct
+};
+
void DataLayout::init(StringRef Desc) {
initializeDataLayoutPass(*PassRegistry::getPassRegistry());
LayoutMap = 0;
LittleEndian = false;
StackNaturalAlign = 0;
+ ManglingMode = MM_None;
// Default alignments
- setAlignment(INTEGER_ALIGN, 1, 1, 1); // i1
- setAlignment(INTEGER_ALIGN, 1, 1, 8); // i8
- setAlignment(INTEGER_ALIGN, 2, 2, 16); // i16
- setAlignment(INTEGER_ALIGN, 4, 4, 32); // i32
- setAlignment(INTEGER_ALIGN, 4, 8, 64); // i64
- setAlignment(FLOAT_ALIGN, 2, 2, 16); // half
- setAlignment(FLOAT_ALIGN, 4, 4, 32); // float
- setAlignment(FLOAT_ALIGN, 8, 8, 64); // double
- setAlignment(FLOAT_ALIGN, 16, 16, 128); // ppcf128, quad, ...
- setAlignment(VECTOR_ALIGN, 8, 8, 64); // v2i32, v1i64, ...
- setAlignment(VECTOR_ALIGN, 16, 16, 128); // v16i8, v8i16, v4i32, ...
- setAlignment(AGGREGATE_ALIGN, 0, 8, 0); // struct
+ for (int I = 0, N = array_lengthof(DefaultAlignments); I < N; ++I) {
+ const LayoutAlignElem &E = DefaultAlignments[I];
+ setAlignment((AlignTypeEnum)E.AlignType, E.ABIAlign, E.PrefAlign,
+ E.TypeBitWidth);
+ }
setPointerAlignment(0, 8, 8, 8);
parseSpecifier(Desc);
Tok = Tok.substr(1);
switch (Specifier) {
+ case 's':
+ // Ignored for backward compatibility.
+ // FIXME: remove this on LLVM 4.0.
+ break;
case 'E':
LittleEndian = false;
break;
case 'i':
case 'v':
case 'f':
- case 'a':
- case 's': {
+ case 'a': {
AlignTypeEnum AlignType;
switch (Specifier) {
default:
case 'v': AlignType = VECTOR_ALIGN; break;
case 'f': AlignType = FLOAT_ALIGN; break;
case 'a': AlignType = AGGREGATE_ALIGN; break;
- case 's': AlignType = STACK_ALIGN; break;
}
// Bit size.
unsigned Size = Tok.empty() ? 0 : getInt(Tok);
+ assert((AlignType != AGGREGATE_ALIGN || Size == 0) &&
+ "These specifications don't have a size");
+
// ABI alignment.
Split = split(Rest, ':');
unsigned ABIAlign = inBytes(getInt(Tok));
StackNaturalAlign = inBytes(getInt(Tok));
break;
}
+ case 'm':
+ assert(Tok.empty());
+ assert(Rest.size() == 1);
+ switch(Rest[0]) {
+ default:
+ llvm_unreachable("Unknown mangling in datalayout string");
+ case 'e':
+ ManglingMode = MM_ELF;
+ break;
+ case 'o':
+ ManglingMode = MM_MachO;
+ break;
+ case 'm':
+ ManglingMode = MM_Mips;
+ break;
+ case 'c':
+ ManglingMode = MM_COFF;
+ break;
+ }
+ break;
default:
llvm_unreachable("Unknown specifier in datalayout string");
break;
raw_string_ostream OS(Result);
OS << (LittleEndian ? "e" : "E");
+
+ switch (ManglingMode) {
+ case MM_None:
+ break;
+ case MM_ELF:
+ OS << "-m:e";
+ break;
+ case MM_MachO:
+ OS << "-m:o";
+ break;
+ case MM_COFF:
+ OS << "-m:c";
+ break;
+ case MM_Mips:
+ OS << "-m:m";
+ break;
+ }
+
SmallVector<unsigned, 8> addrSpaces;
// Lets get all of the known address spaces and sort them
// into increasing order so that we can emit the string
for (SmallVectorImpl<unsigned>::iterator asb = addrSpaces.begin(),
ase = addrSpaces.end(); asb != ase; ++asb) {
const PointerAlignElem &PI = Pointers.find(*asb)->second;
+
+ // Skip default.
+ if (PI.AddressSpace == 0 && PI.ABIAlign == 8 && PI.PrefAlign == 8 &&
+ PI.TypeByteWidth == 8)
+ continue;
+
OS << "-p";
if (PI.AddressSpace) {
OS << PI.AddressSpace;
}
- OS << ":" << PI.TypeByteWidth*8 << ':' << PI.ABIAlign*8
- << ':' << PI.PrefAlign*8;
+ OS << ":" << PI.TypeByteWidth*8 << ':' << PI.ABIAlign*8;
+ if (PI.PrefAlign != PI.ABIAlign)
+ OS << ':' << PI.PrefAlign*8;
}
- OS << "-S" << StackNaturalAlign*8;
+ const LayoutAlignElem *DefaultStart = DefaultAlignments;
+ const LayoutAlignElem *DefaultEnd =
+ DefaultStart + array_lengthof(DefaultAlignments);
for (unsigned i = 0, e = Alignments.size(); i != e; ++i) {
const LayoutAlignElem &AI = Alignments[i];
- OS << '-' << (char)AI.AlignType << AI.TypeBitWidth << ':'
- << AI.ABIAlign*8 << ':' << AI.PrefAlign*8;
+ if (std::find(DefaultStart, DefaultEnd, AI) != DefaultEnd)
+ continue;
+ OS << '-' << (char)AI.AlignType;
+ if (AI.TypeBitWidth)
+ OS << AI.TypeBitWidth;
+ OS << ':' << AI.ABIAlign*8;
+ if (AI.ABIAlign != AI.PrefAlign)
+ OS << ':' << AI.PrefAlign*8;
}
if (!LegalIntWidths.empty()) {
for (unsigned i = 1, e = LegalIntWidths.size(); i != e; ++i)
OS << ':' << (unsigned)LegalIntWidths[i];
}
+
+ if (StackNaturalAlign)
+ OS << "-S" << StackNaturalAlign*8;
+
return OS.str();
}
return getAlignmentInfo(INTEGER_ALIGN, BitWidth, true, 0);
}
-unsigned DataLayout::getCallFrameTypeAlignment(Type *Ty) const {
- for (unsigned i = 0, e = Alignments.size(); i != e; ++i)
- if (Alignments[i].AlignType == STACK_ALIGN)
- return Alignments[i].ABIAlign;
-
- return getABITypeAlignment(Ty);
-}
-
unsigned DataLayout::getPrefTypeAlignment(Type *Ty) const {
return getAlignment(Ty, false);
}
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