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Mac OS X X86-64 low 4G address not available.

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llvm-svn: 40701
This commit is contained in:
Evan Cheng 2007-08-01 23:45:51 +00:00
parent f21f509c2c
commit 0fa6cdbff5
4 changed files with 21 additions and 1 deletions
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3
lib/Target/X86/X86ISelDAGToDAG.cpp
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@ -614,7 +614,8 @@ bool X86DAGToDAGISel::MatchAddress(SDOperand N, X86ISelAddressMode &AM,
bool isStatic = TM.getRelocationModel() == Reloc::Static;
SDOperand N0 = N.getOperand(0);
// Mac OS X X86-64 lower 4G address is not available.
bool isAbs32 = !is64Bit || (isStatic && !Subtarget->isTargetDarwin());
bool isAbs32 = !is64Bit ||
(isStatic && Subtarget->hasLow4GUserSpaceAddress());
if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(N0)) {
GlobalValue *GV = G->getGlobal();
if (isAbs32 || isRoot) {

1
lib/Target/X86/X86InstrInfo.td
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@ -162,6 +162,7 @@ def HasSSSE3 : Predicate<"Subtarget->hasSSSE3()">;
def FPStack : Predicate<"!Subtarget->hasSSE2()">;
def In32BitMode : Predicate<"!Subtarget->is64Bit()">;
def In64BitMode : Predicate<"Subtarget->is64Bit()">;
def HasLow4G : Predicate<"Subtarget->hasLow4GUserSpaceAddress()">;
def SmallCode : Predicate<"TM.getCodeModel() == CodeModel::Small">;
def NotSmallCode : Predicate<"TM.getCodeModel() != CodeModel::Small">;
def IsStatic : Predicate<"TM.getRelocationModel() == Reloc::Static">;

4
lib/Target/X86/X86Subtarget.cpp
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@ -225,6 +225,7 @@ X86Subtarget::X86Subtarget(const Module &M, const std::string &FS, bool is64Bit)
// FIXME: this is a known good value for Yonah. How about others?
, MinRepStrSizeThreshold(128)
, Is64Bit(is64Bit)
, HasLow4GUserAddress(true)
, TargetType(isELF) { // Default to ELF unless otherwise specified.
// Determine default and user specified characteristics
@ -285,6 +286,9 @@ X86Subtarget::X86Subtarget(const Module &M, const std::string &FS, bool is64Bit)
}
}
if (TargetType == isDarwin && Is64Bit)
HasLow4GUserAddress = false;
if (TargetType == isDarwin ||
TargetType == isCygwin ||
TargetType == isMingw ||

14
lib/Target/X86/X86Subtarget.h
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@ -46,18 +46,23 @@ protected:
};
/// AsmFlavor - Which x86 asm dialect to use.
///
AsmWriterFlavorTy AsmFlavor;
/// PICStyle - Which PIC style to use
///
PICStyle::Style PICStyle;
/// X86SSELevel - MMX, SSE1, SSE2, SSE3, SSSE3, or none supported.
///
X86SSEEnum X86SSELevel;
/// X863DNowLevel - 3DNow or 3DNow Athlon, or none supported.
///
X863DNowEnum X863DNowLevel;
/// HasX86_64 - True if the processor supports X86-64 instructions.
///
bool HasX86_64;
/// stackAlignment - The minimum alignment known to hold of the stack frame on
@ -65,6 +70,7 @@ protected:
unsigned stackAlignment;
/// Min. memset / memcpy size that is turned into rep/movs, rep/stos ops.
///
unsigned MinRepStrSizeThreshold;
private:
@ -72,6 +78,10 @@ private:
/// pointer size is 64 bit.
bool Is64Bit;
/// HasLow4GUserAddress - True if the low 4G user-space address is available.
///
bool HasLow4GUserAddress;
public:
enum {
isELF, isCygwin, isDarwin, isWindows, isMingw
@ -103,6 +113,10 @@ public:
bool is64Bit() const { return Is64Bit; }
/// hasLow4GUserSpaceAddress - True if lower 4G user-space address is
/// available.
bool hasLow4GUserSpaceAddress() const { return HasLow4GUserAddress; }
PICStyle::Style getPICStyle() const { return PICStyle; }
void setPICStyle(PICStyle::Style Style) { PICStyle = Style; }