RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-01-06 03:08:43 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

eliminate GVRequiresRegister, replacing it with predicates we

Browse Source 
need for other purposes.

llvm-svn: 75243
This commit is contained in:
Chris Lattner 2009-07-10 07:38:24 +00:00
parent e4e0c73ed0
commit 7c038a2b3c
3 changed files with 9 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
lib/Target/X86/X86ISelLowering.cpp
View File

@ -7036,12 +7036,16 @@ bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
return false;
if (AM.BaseGV) {
// We can only fold this if we don't need an extra load.
if (Subtarget->GVRequiresExtraLoad(AM.BaseGV, getTargetMachine()))
unsigned GVFlags =
Subtarget->ClassifyGlobalReference(AM.BaseGV, getTargetMachine());
// If a reference to this global requires an extra load, we can't fold it.
if (isGlobalStubReference(GVFlags))
return false;
// If BaseGV requires a register, we cannot also have a BaseReg.
if (Subtarget->GVRequiresRegister(AM.BaseGV, getTargetMachine()) &&
AM.HasBaseReg)
// If BaseGV requires a register for the PIC base, we cannot also have a
// BaseReg specified.
if (AM.HasBaseReg && isGlobalRelativeToPICBase(GVFlags))
return false;
// X86-64 only supports addr of globals in small code model.

14
lib/Target/X86/X86Subtarget.cpp
View File

@ -120,20 +120,6 @@ bool X86Subtarget::GVRequiresExtraLoad(const GlobalValue *GV,
return isGlobalStubReference(ClassifyGlobalReference(GV, TM));
}
/// True if accessing the GV requires a register. This is a superset of the
/// cases where GVRequiresExtraLoad is true. Some variations of PIC require
/// a register, but not an extra load.
bool X86Subtarget::GVRequiresRegister(const GlobalValue *GV,
const TargetMachine &TM) const {
if (GVRequiresExtraLoad(GV, TM))
return true;
// Code below here need only consider cases where GVRequiresExtraLoad
// returns false.
if (TM.getRelocationModel() == Reloc::PIC_)
return GV->hasLocalLinkage() || GV->hasExternalLinkage();
return false;
}
/// getBZeroEntry - This function returns the name of a function which has an
/// interface like the non-standard bzero function, if such a function exists on

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

@ -206,11 +206,6 @@ public:
/// or index register of the address, not the GV offset field.
bool GVRequiresExtraLoad(const GlobalValue *GV, const TargetMachine &TM)const;
/// True if accessing the GV requires a register. This is a superset of the
/// cases where GVRequiresExtraLoad is true. Some variations of PIC require
/// a register, but not an extra load.
bool GVRequiresRegister(const GlobalValue *GV, const TargetMachine &TM) const;
/// IsLegalToCallImmediateAddr - Return true if the subtarget allows calls
/// to immediate address.
bool IsLegalToCallImmediateAddr(const TargetMachine &TM) const;