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Move PPC's getDataLayoutString out of line and document it better.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196987 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2013-12-11 00:09:06 +00:00
parent 4d5bee428f
commit 23daba0cb2
2 changed files with 39 additions and 17 deletions
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lib/Target/PowerPC/PPCTargetMachine.cpp
+39 -1
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@@ -33,6 +33,44 @@ extern "C" void LLVMInitializePowerPCTarget() {
RegisterTargetMachine<PPC64TargetMachine> C(ThePPC64LETarget);
}
/// Return the datalayout string of a subtarget.
static std::string getDataLayoutString(const PPCSubtarget &ST) {
const Triple &T = ST.getTargetTriple();
// PPC is big endian
std::string Ret = "E";
// PPC64 has 64 bit pointers, PPC32 has 32 bit pointers.
if (ST.isPPC64())
Ret += "-p:64:64";
else
Ret += "-p:32:32";
// Note, the alignment values for f64 and i64 on ppc64 in Darwin
// documentation are wrong; these are correct (i.e. "what gcc does").
Ret += "-f64:64:64-i64:64:64";
// Set support for 128 floats depending on the ABI.
if (ST.isPPC64() && ST.isSVR4ABI()) {
if (T.getOS() != llvm::Triple::FreeBSD)
Ret += "-f128:128:128";
} else {
Ret += "-f128:64:128";
}
// Some ABIs support 128 bit vectors.
if (ST.isPPC64() && ST.isSVR4ABI())
Ret += "-v128:128:128";
// PPC64 has 32 and 64 bit register, PPC32 has only 32 bit ones.
if (ST.isPPC64())
Ret += "-n32:64";
else
Ret += "-n32";
return Ret;
}
PPCTargetMachine::PPCTargetMachine(const Target &T, StringRef TT,
StringRef CPU, StringRef FS,
const TargetOptions &Options,
@@ -41,7 +79,7 @@ PPCTargetMachine::PPCTargetMachine(const Target &T, StringRef TT,
bool is64Bit)
: LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
Subtarget(TT, CPU, FS, is64Bit),
DL(Subtarget.getDataLayoutString()), InstrInfo(*this),
DL(getDataLayoutString(Subtarget)), InstrInfo(*this),
FrameLowering(Subtarget), JITInfo(*this, is64Bit),
TLInfo(*this), TSInfo(*this),
InstrItins(Subtarget.getInstrItineraryData()) {