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Add register Mips::GP to the list of reserved registers if target is bare-metal

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to prevent it from being clobbered. mips uses $gp to access small data section.

This bug was originally reported by Carl Norum.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162340 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka
2012-08-22 03:18:13 +00:00
parent 6522a9e04b
commit e7338cd550
7 changed files with 34 additions and 7 deletions
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6
lib/Target/Mips/MipsSubtarget.cpp
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@ -25,7 +25,8 @@ using namespace llvm;
void MipsSubtarget::anchor() { }
MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
const std::string &FS, bool little) :
const std::string &FS, bool little,
Reloc::Model RM) :
MipsGenSubtargetInfo(TT, CPU, FS),
MipsArchVersion(Mips32), MipsABI(UnknownABI), IsLittle(little),
IsSingleFloat(false), IsFP64bit(false), IsGP64bit(false), HasVFPU(false),
@ -54,6 +55,9 @@ MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
// Is the target system Linux ?
if (TT.find("linux") == std::string::npos)
IsLinux = false;
// Set UseSmallSection.
UseSmallSection = !IsLinux && (RM == Reloc::Static);
}
bool