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Initialize X86 DataLayout based on the Triple only.

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llvm-svn: 215279
This commit is contained in:
Eric Christopher 2014-08-09 04:38:53 +00:00
parent a4bc0c8914
commit d181d98332
2 changed files with 17 additions and 14 deletions
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26
lib/Target/X86/X86Subtarget.cpp
View File

@ -298,37 +298,39 @@ void X86Subtarget::initializeEnvironment() {
MaxInlineSizeThreshold = 128;
}
static std::string computeDataLayout(const X86Subtarget &ST) {
static std::string computeDataLayout(const Triple &TT) {
// X86 is little endian
std::string Ret = "e";
Ret += DataLayout::getManglingComponent(ST.getTargetTriple());
Ret += DataLayout::getManglingComponent(TT);
// X86 and x32 have 32 bit pointers.
if (ST.isTarget64BitILP32() || !ST.is64Bit())
if ((TT.isArch64Bit() &&
(TT.getEnvironment() == Triple::GNUX32 || TT.isOSNaCl())) ||
!TT.isArch64Bit())
Ret += "-p:32:32";
// Some ABIs align 64 bit integers and doubles to 64 bits, others to 32.
if (ST.is64Bit() || ST.isOSWindows() || ST.isTargetNaCl())
if (TT.isArch64Bit() || TT.isOSWindows() || TT.isOSNaCl())
Ret += "-i64:64";
else
Ret += "-f64:32:64";
// Some ABIs align long double to 128 bits, others to 32.
if (ST.isTargetNaCl())
if (TT.isOSNaCl())
; // No f80
else if (ST.is64Bit() || ST.isTargetDarwin())
else if (TT.isArch64Bit() || TT.isOSDarwin())
Ret += "-f80:128";
else
Ret += "-f80:32";
// The registers can hold 8, 16, 32 or, in x86-64, 64 bits.
if (ST.is64Bit())
if (TT.isArch64Bit())
Ret += "-n8:16:32:64";
else
Ret += "-n8:16:32";
// The stack is aligned to 32 bits on some ABIs and 128 bits on others.
if (!ST.is64Bit() && ST.isOSWindows())
if (!TT.isArch64Bit() && TT.isOSWindows())
Ret += "-S32";
else
Ret += "-S128";
@ -348,16 +350,16 @@ X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU,
unsigned StackAlignOverride)
: X86GenSubtargetInfo(TT, CPU, FS), X86ProcFamily(Others),
PICStyle(PICStyles::None), TargetTriple(TT),
DL(computeDataLayout(TargetTriple)),
StackAlignOverride(StackAlignOverride),
In64BitMode(TargetTriple.getArch() == Triple::x86_64),
In32BitMode(TargetTriple.getArch() == Triple::x86 &&
TargetTriple.getEnvironment() != Triple::CODE16),
In16BitMode(TargetTriple.getArch() == Triple::x86 &&
TargetTriple.getEnvironment() == Triple::CODE16),
DL(computeDataLayout(*this)), TSInfo(DL),
InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM),
FrameLowering(TargetFrameLowering::StackGrowsDown, getStackAlignment(),
is64Bit() ? -8 : -4),
TSInfo(DL), InstrInfo(initializeSubtargetDependencies(CPU, FS)),
TLInfo(TM), FrameLowering(TargetFrameLowering::StackGrowsDown,
getStackAlignment(), is64Bit() ? -8 : -4),
JITInfo(hasSSE1()) {
// Determine the PICStyle based on the target selected.
if (TM.getRelocationModel() == Reloc::Static) {

5
lib/Target/X86/X86Subtarget.h
View File

@ -223,6 +223,9 @@ protected:
InstrItineraryData InstrItins;
private:
// Calculates type size & alignment
const DataLayout DL;
/// StackAlignOverride - Override the stack alignment.
unsigned StackAlignOverride;
@ -235,8 +238,6 @@ private:
/// In16BitMode - True if compiling for 16-bit, false for 32-bit or 64-bit.
bool In16BitMode;
// Calculates type size & alignment
const DataLayout DL;
X86SelectionDAGInfo TSInfo;
// Ordering here is important. X86InstrInfo initializes X86RegisterInfo which
// X86TargetLowering needs.