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EHPreferredDataFormat hook for PPC targets. Looks like Darwin

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uses the same encoding everywhere. Linux FIXME'ed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47701 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2008-02-27 23:49:15 +00:00
parent 26c22cfbcd
commit 7b1b7f5c5a
2 changed files with 30 additions and 1 deletions
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29
lib/Target/PowerPC/PPCTargetAsmInfo.cpp
View File

@ -14,7 +14,10 @@
#include "PPCTargetAsmInfo.h"
#include "PPCTargetMachine.h"
#include "llvm/Function.h"
#include "llvm/Support/Dwarf.h"
using namespace llvm;
using namespace llvm::dwarf;
PPCTargetAsmInfo::PPCTargetAsmInfo(const PPCTargetMachine &TM) {
bool isPPC64 = TM.getSubtargetImpl()->isPPC64();
@ -27,7 +30,6 @@ PPCTargetAsmInfo::PPCTargetAsmInfo(const PPCTargetMachine &TM) {
InlineAsmStart = "# InlineAsm Start";
InlineAsmEnd = "# InlineAsm End";
AssemblerDialect = TM.getSubtargetImpl()->getAsmFlavor();
}
DarwinTargetAsmInfo::DarwinTargetAsmInfo(const PPCTargetMachine &TM)
@ -86,6 +88,21 @@ DarwinTargetAsmInfo::DarwinTargetAsmInfo(const PPCTargetMachine &TM)
}
}
/// PreferredEHDataFormat - This hook allows the target to select data
/// format used for encoding pointers in exception handling data. Reason is
/// 0 for data, 1 for code labels, 2 for function pointers. Global is true
/// if the symbol can be relocated.
unsigned DarwinTargetAsmInfo::PreferredEHDataFormat(unsigned Reason,
bool Global) const {
if (Reason == 2 && Global)
return (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4);
else if (Reason == 1 || !Global)
return DW_EH_PE_pcrel;
else
return DW_EH_PE_absptr;
}
LinuxTargetAsmInfo::LinuxTargetAsmInfo(const PPCTargetMachine &TM)
: PPCTargetAsmInfo(TM)
{
@ -132,3 +149,13 @@ LinuxTargetAsmInfo::LinuxTargetAsmInfo(const PPCTargetMachine &TM)
DwarfEHFrameSection = "\t.section\t.eh_frame,\"aw\",@progbits";
DwarfExceptionSection = "\t.section\t.gcc_except_table,\"a\",@progbits";
}
/// PreferredEHDataFormat - This hook allows the target to select data
/// format used for encoding pointers in exception handling data. Reason is
/// 0 for data, 1 for code labels, 2 for function pointers. Global is true
/// if the symbol can be relocated.
unsigned LinuxTargetAsmInfo::PreferredEHDataFormat(unsigned Reason,
bool Global) const {
// We really need to write something here.
return TargetAsmInfo::PreferredEHDataFormat(Reason, Global);
}

2
lib/Target/PowerPC/PPCTargetAsmInfo.h
View File

@ -27,10 +27,12 @@ namespace llvm {
struct DarwinTargetAsmInfo : public PPCTargetAsmInfo {
explicit DarwinTargetAsmInfo(const PPCTargetMachine &TM);
virtual unsigned PreferredEHDataFormat(unsigned Reason, bool Global) const;
};
struct LinuxTargetAsmInfo : public PPCTargetAsmInfo {
explicit LinuxTargetAsmInfo(const PPCTargetMachine &TM);
virtual unsigned PreferredEHDataFormat(unsigned Reason, bool Global) const;
};
} // namespace llvm