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Complete conditionalization of Dwarf reg numbers.

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Would somebody not on Darwin please make sure this
doesn't break anything.  Exception handling failures
would be the most likely symptom.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43844 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2007-11-07 21:48:35 +00:00
parent 033903c37b
commit 4542edcaa7
2 changed files with 86 additions and 41 deletions
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52
lib/Target/X86/X86RegisterInfo.cpp
View File

@ -657,15 +657,55 @@ X86RegisterInfo::X86RegisterInfo(X86TargetMachine &tm,
// getDwarfRegNum - This function maps LLVM register identifiers to the // getDwarfRegNum - This function maps LLVM register identifiers to the
// Dwarf specific numbering, used in debug info and exception tables. // Dwarf specific numbering, used in debug info and exception tables.
// The registers are given "basic" dwarf numbers in the .td files, // The registers are given "basic" dwarf numbers in the .td files,
// which are collected by TableGen into X86GenRegisterInfo::getDwarfRegNum. // which are for the 64-bit target. These are collected by TableGen
// This wrapper allows for target-specific overrides. // into X86GenRegisterInfo::getDwarfRegNum and overridden here for
// other targets.
// FIXME: Comments in gcc indicate that Darwin uses different numbering
// for debug info and exception handling info:( The numbering here is
// for exception handling.
int X86RegisterInfo::getDwarfRegNum(unsigned RegNo) const { int X86RegisterInfo::getDwarfRegNum(unsigned RegNo) const {
int n = X86GenRegisterInfo::getDwarfRegNum(RegNo); int n = X86GenRegisterInfo::getDwarfRegNum(RegNo);
const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>(); const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
if (Subtarget->isDarwin) { if (!Subtarget->is64Bit()) {
// ESP and EBP are switched. // Numbers are all different for 32-bit. Further, some of them
if (n==4) return 5; // differ between Darwin and other targets.
if (n==5) return 4; switch (n) {
default: assert(0 && "Invalid argument to getDwarfRegNum");
return n;
case 0: return 0; // ax
case 1: return 2; // dx
case 2: return 1; // cx
case 3: return 3; // bx
case 4: return 6; // si
case 5: return 7; // di
case 6: return (Subtarget->isDarwin) ? 4 : 5; // bp
case 7: return (Subtarget->isDarwin) ? 5 : 4; // sp
case 8: case 9: case 10: case 11: // r8..r15
case 12: case 13: case 14: case 15:
assert(0 && "Invalid register in 32-bit mode");
return n;
case 16: return 8; // ip
case 17: case 18: case 19: case 20: // xmm0..xmm7
case 21: case 22: case 23: case 24:
return n+4;
case 25: case 26: case 27: case 28: // xmm8..xmm15
case 29: case 30: case 31: case 32:
assert(0 && "Invalid register in 32-bit mode");
return n;
case 33: case 34: case 35: case 36: // st0..st7
case 37: case 38: case 39: case 40:
return (Subtarget->isDarwin) ? n-21 : n-22;
case 41: case 42: case 43: case 44: // mm0..mm7
case 45: case 46: case 47: case 48:
return n-12;
}
} }
return n; return n;
} }

75
lib/Target/X86/X86RegisterInfo.td
View File

@ -23,12 +23,17 @@ let Namespace = "X86" in {
// because the register file generator is smart enough to figure out that // because the register file generator is smart enough to figure out that
// AL aliases AX if we tell it that AX aliased AL (for example). // AL aliases AX if we tell it that AX aliased AL (for example).
// FIXME: X86-64 have different Dwarf numbers. // Dwarf numbering is different for 32-bit and 64-bit, and there are
// variations by target as well. The numbers here are for 64-bit.
// They are altered by X86RegisterInfo::getDwarfRegNum at runtime. Note
// that we can't assign the same number here to different registers, as
// getDwarfRegNum has only the number here to work with.
// 8-bit registers // 8-bit registers
// Low registers // Low registers
def AL : Register<"AL">, DwarfRegNum<0>; def AL : Register<"AL">, DwarfRegNum<0>;
def CL : Register<"CL">, DwarfRegNum<1>; def DL : Register<"DL">, DwarfRegNum<1>;
def DL : Register<"DL">, DwarfRegNum<2>; def CL : Register<"CL">, DwarfRegNum<2>;
def BL : Register<"BL">, DwarfRegNum<3>; def BL : Register<"BL">, DwarfRegNum<3>;
// X86-64 only // X86-64 only
@ -47,20 +52,20 @@ let Namespace = "X86" in {
// High registers X86-32 only // High registers X86-32 only
def AH : Register<"AH">, DwarfRegNum<0>; def AH : Register<"AH">, DwarfRegNum<0>;
def CH : Register<"CH">, DwarfRegNum<1>; def DH : Register<"DH">, DwarfRegNum<1>;
def DH : Register<"DH">, DwarfRegNum<2>; def CH : Register<"CH">, DwarfRegNum<2>;
def BH : Register<"BH">, DwarfRegNum<3>; def BH : Register<"BH">, DwarfRegNum<3>;
// 16-bit registers // 16-bit registers
def AX : RegisterWithSubRegs<"AX", [AH,AL]>, DwarfRegNum<0>; def AX : RegisterWithSubRegs<"AX", [AH,AL]>, DwarfRegNum<0>;
def CX : RegisterWithSubRegs<"CX", [CH,CL]>, DwarfRegNum<1>; def DX : RegisterWithSubRegs<"DX", [DH,DL]>, DwarfRegNum<1>;
def DX : RegisterWithSubRegs<"DX", [DH,DL]>, DwarfRegNum<2>; def CX : RegisterWithSubRegs<"CX", [CH,CL]>, DwarfRegNum<2>;
def BX : RegisterWithSubRegs<"BX", [BH,BL]>, DwarfRegNum<3>; def BX : RegisterWithSubRegs<"BX", [BH,BL]>, DwarfRegNum<3>;
def SP : RegisterWithSubRegs<"SP", [SPL]>, DwarfRegNum<4>; def SI : RegisterWithSubRegs<"SI", [SIL]>, DwarfRegNum<4>;
def BP : RegisterWithSubRegs<"BP", [BPL]>, DwarfRegNum<5>; def DI : RegisterWithSubRegs<"DI", [DIL]>, DwarfRegNum<5>;
def SI : RegisterWithSubRegs<"SI", [SIL]>, DwarfRegNum<6>; def BP : RegisterWithSubRegs<"BP", [BPL]>, DwarfRegNum<6>;
def DI : RegisterWithSubRegs<"DI", [DIL]>, DwarfRegNum<7>; def SP : RegisterWithSubRegs<"SP", [SPL]>, DwarfRegNum<7>;
def IP : Register<"IP">, DwarfRegNum<8>; def IP : Register<"IP">, DwarfRegNum<16>;
// X86-64 only // X86-64 only
def R8W : RegisterWithSubRegs<"R8W", [R8B]>, DwarfRegNum<8>; def R8W : RegisterWithSubRegs<"R8W", [R8B]>, DwarfRegNum<8>;
@ -74,14 +79,14 @@ let Namespace = "X86" in {
// 32-bit registers // 32-bit registers
def EAX : RegisterWithSubRegs<"EAX", [AX]>, DwarfRegNum<0>; def EAX : RegisterWithSubRegs<"EAX", [AX]>, DwarfRegNum<0>;
def ECX : RegisterWithSubRegs<"ECX", [CX]>, DwarfRegNum<1>; def EDX : RegisterWithSubRegs<"EDX", [DX]>, DwarfRegNum<1>;
def EDX : RegisterWithSubRegs<"EDX", [DX]>, DwarfRegNum<2>; def ECX : RegisterWithSubRegs<"ECX", [CX]>, DwarfRegNum<2>;
def EBX : RegisterWithSubRegs<"EBX", [BX]>, DwarfRegNum<3>; def EBX : RegisterWithSubRegs<"EBX", [BX]>, DwarfRegNum<3>;
def ESP : RegisterWithSubRegs<"ESP", [SP]>, DwarfRegNum<4>; def ESI : RegisterWithSubRegs<"ESI", [SI]>, DwarfRegNum<4>;
def EBP : RegisterWithSubRegs<"EBP", [BP]>, DwarfRegNum<5>; def EDI : RegisterWithSubRegs<"EDI", [DI]>, DwarfRegNum<5>;
def ESI : RegisterWithSubRegs<"ESI", [SI]>, DwarfRegNum<6>; def EBP : RegisterWithSubRegs<"EBP", [BP]>, DwarfRegNum<6>;
def EDI : RegisterWithSubRegs<"EDI", [DI]>, DwarfRegNum<7>; def ESP : RegisterWithSubRegs<"ESP", [SP]>, DwarfRegNum<7>;
def EIP : RegisterWithSubRegs<"EIP", [IP]>, DwarfRegNum<8>; def EIP : RegisterWithSubRegs<"EIP", [IP]>, DwarfRegNum<16>;
// X86-64 only // X86-64 only
def R8D : RegisterWithSubRegs<"R8D", [R8W]>, DwarfRegNum<8>; def R8D : RegisterWithSubRegs<"R8D", [R8W]>, DwarfRegNum<8>;
@ -114,14 +119,14 @@ let Namespace = "X86" in {
def RIP : RegisterWithSubRegs<"RIP", [EIP]>, DwarfRegNum<16>; def RIP : RegisterWithSubRegs<"RIP", [EIP]>, DwarfRegNum<16>;
// MMX Registers. These are actually aliased to ST0 .. ST7 // MMX Registers. These are actually aliased to ST0 .. ST7
def MM0 : Register<"MM0">, DwarfRegNum<29>; def MM0 : Register<"MM0">, DwarfRegNum<41>;
def MM1 : Register<"MM1">, DwarfRegNum<30>; def MM1 : Register<"MM1">, DwarfRegNum<42>;
def MM2 : Register<"MM2">, DwarfRegNum<31>; def MM2 : Register<"MM2">, DwarfRegNum<43>;
def MM3 : Register<"MM3">, DwarfRegNum<32>; def MM3 : Register<"MM3">, DwarfRegNum<44>;
def MM4 : Register<"MM4">, DwarfRegNum<33>; def MM4 : Register<"MM4">, DwarfRegNum<45>;
def MM5 : Register<"MM5">, DwarfRegNum<34>; def MM5 : Register<"MM5">, DwarfRegNum<46>;
def MM6 : Register<"MM6">, DwarfRegNum<35>; def MM6 : Register<"MM6">, DwarfRegNum<47>;
def MM7 : Register<"MM7">, DwarfRegNum<36>; def MM7 : Register<"MM7">, DwarfRegNum<48>;
// Pseudo Floating Point registers // Pseudo Floating Point registers
def FP0 : Register<"FP0">, DwarfRegNum<-1>; def FP0 : Register<"FP0">, DwarfRegNum<-1>;
@ -153,14 +158,14 @@ let Namespace = "X86" in {
def XMM15: Register<"XMM15">, DwarfRegNum<32>; def XMM15: Register<"XMM15">, DwarfRegNum<32>;
// Floating point stack registers // Floating point stack registers
def ST0 : Register<"ST(0)">, DwarfRegNum<11>; def ST0 : Register<"ST(0)">, DwarfRegNum<33>;
def ST1 : Register<"ST(1)">, DwarfRegNum<12>; def ST1 : Register<"ST(1)">, DwarfRegNum<34>;
def ST2 : Register<"ST(2)">, DwarfRegNum<13>; def ST2 : Register<"ST(2)">, DwarfRegNum<35>;
def ST3 : Register<"ST(3)">, DwarfRegNum<14>; def ST3 : Register<"ST(3)">, DwarfRegNum<36>;
def ST4 : Register<"ST(4)">, DwarfRegNum<15>; def ST4 : Register<"ST(4)">, DwarfRegNum<37>;
def ST5 : Register<"ST(5)">, DwarfRegNum<16>; def ST5 : Register<"ST(5)">, DwarfRegNum<38>;
def ST6 : Register<"ST(6)">, DwarfRegNum<17>; def ST6 : Register<"ST(6)">, DwarfRegNum<39>;
def ST7 : Register<"ST(7)">, DwarfRegNum<18>; def ST7 : Register<"ST(7)">, DwarfRegNum<40>;
// Status flags register // Status flags register
def EFLAGS : Register<"EFLAGS">; def EFLAGS : Register<"EFLAGS">;