6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-05 09:24:28 +00:00
Code Issues Projects Releases Wiki Activity

Output floating point representations in DWARF format. This is done by outputing

Browse Source 
the FP encoding directly as a hex representation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100487 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2010-04-05 22:59:21 +00:00
parent 796e64b546
commit 57fbba4dba
1 changed files with 26 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -14,6 +14,7 @@
#define DEBUG_TYPE "dwarfdebug" #define DEBUG_TYPE "dwarfdebug"
#include "DwarfDebug.h" #include "DwarfDebug.h"
#include "DIE.h" #include "DIE.h"
#include "llvm/Constants.h"
#include "llvm/Module.h" #include "llvm/Module.h"
#include "llvm/CodeGen/MachineFunction.h" #include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineModuleInfo.h" #include "llvm/CodeGen/MachineModuleInfo.h"
@ -1529,6 +1530,31 @@ DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) {
unsigned Imm = DbgValueInsn->getOperand(0).getImm(); unsigned Imm = DbgValueInsn->getOperand(0).getImm();
addUInt(Block, 0, dwarf::DW_FORM_udata, Imm); addUInt(Block, 0, dwarf::DW_FORM_udata, Imm);
addBlock(VariableDie, dwarf::DW_AT_const_value, 0, Block); addBlock(VariableDie, dwarf::DW_AT_const_value, 0, Block);
if (MCSymbol *VS = DV->getDbgValueLabel())
addLabel(VariableDie, dwarf::DW_AT_start_scope, dwarf::DW_FORM_addr,
VS);
} else if (DbgValueInsn->getOperand(0).getType() ==
MachineOperand::MO_FPImmediate) {
DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
APFloat FPImm = DbgValueInsn->getOperand(0).getFPImm()->getValueAPF();
// Get the raw data form of the floating point.
const APInt FltVal = FPImm.bitcastToAPInt();
const char *FltPtr = (const char*)FltVal.getRawData();
unsigned NumBytes = FltVal.getBitWidth() / 8; // 8 bits per byte.
bool LittleEndian = Asm->getTargetData().isLittleEndian();
int Incr = (LittleEndian ? 1 : -1);
int Start = (LittleEndian ? 0 : NumBytes - 1);
int Stop = (LittleEndian ? NumBytes : -1);
// Output the constant to DWARF one byte at a time.
for (; Start != Stop; Start += Incr)
addUInt(Block, 0, dwarf::DW_FORM_data1,
(unsigned char)0xFF & FltPtr[Start]);
addBlock(VariableDie, dwarf::DW_AT_const_value, 0, Block);
if (MCSymbol *VS = DV->getDbgValueLabel()) if (MCSymbol *VS = DV->getDbgValueLabel())
addLabel(VariableDie, dwarf::DW_AT_start_scope, dwarf::DW_FORM_addr, addLabel(VariableDie, dwarf::DW_AT_start_scope, dwarf::DW_FORM_addr,
VS); VS);