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Allow X86 addressing modes to represent globals with offsets. Patch contributed

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by Jeff Cohen!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17008 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-10-15 04:43:20 +00:00
parent ca4f6ebefc
commit fb3d844e50
1 changed files with 10 additions and 5 deletions
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15
lib/Target/X86/X86InstrBuilder.h
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@ -30,13 +30,13 @@ namespace llvm {
/// X86AddressMode - This struct holds a generalized full x86 address mode.
/// The base register can be a frame index, which will eventually be replaced
/// with BP or SP and Disp being offsetted accordingly.
/// FIXME: add support for globals as a new base type.
/// with BP or SP and Disp being offsetted accordingly. The displacement may
/// also include the offset of a global value.
struct X86AddressMode {
enum {
UnknownBase,
RegBase,
FrameIndexBase
FrameIndexBase,
} BaseType;
union {
@ -47,8 +47,9 @@ struct X86AddressMode {
unsigned Scale;
unsigned IndexReg;
unsigned Disp;
GlobalValue *GV;
X86AddressMode() : BaseType(UnknownBase) {}
X86AddressMode() : BaseType(UnknownBase), GV(NULL) {}
};
/// addDirectMem - This function is used to add a direct memory reference to the
@ -82,7 +83,11 @@ inline const MachineInstrBuilder &addFullAddress(const MachineInstrBuilder &MIB,
MIB.addFrameIndex(AM.Base.FrameIndex);
else
assert (0);
return MIB.addZImm(AM.Scale).addReg(AM.IndexReg).addSImm(AM.Disp);
MIB.addZImm(AM.Scale).addReg(AM.IndexReg);
if (AM.GV)
return MIB.addGlobalAddress(AM.GV, false, AM.Disp);
else
return MIB.addSImm(AM.Disp);
}
/// addFrameReference - This function is used to add a reference to the base of