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IR: Use format_hex instead of handrolling the conversion. NFC

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Cleans up some very old code in AsmWriter's WriteConstantInternal.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254688 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Justin Bogner 2015-12-04 02:14:34 +00:00
parent 8061fe5c67
commit d8def4abd1
1 changed files with 17 additions and 47 deletions
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64
lib/IR/AsmWriter.cpp
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@ -39,6 +39,7 @@
#include "llvm/Support/Debug.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
@ -1137,15 +1138,12 @@ static void WriteConstantInternal(raw_ostream &Out, const Constant *CV,
// x86, so we must not use these types.
static_assert(sizeof(double) == sizeof(uint64_t),
"assuming that double is 64 bits!");
char Buffer[40];
APFloat apf = CFP->getValueAPF();
// Floats are represented in ASCII IR as double, convert.
if (!isDouble)
apf.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
&ignored);
Out << "0x" <<
utohex_buffer(uint64_t(apf.bitcastToAPInt().getZExtValue()),
Buffer+40);
Out << format_hex(apf.bitcastToAPInt().getZExtValue(), 0, /*Upper=*/true);
return;
}
@ -1153,60 +1151,32 @@ static void WriteConstantInternal(raw_ostream &Out, const Constant *CV,
// These appear as a magic letter identifying the type, then a
// fixed number of hex digits.
Out << "0x";
// Bit position, in the current word, of the next nibble to print.
int shiftcount;
APInt API = CFP->getValueAPF().bitcastToAPInt();
if (&CFP->getValueAPF().getSemantics() == &APFloat::x87DoubleExtended) {
Out << 'K';
// api needed to prevent premature destruction
APInt api = CFP->getValueAPF().bitcastToAPInt();
const uint64_t* p = api.getRawData();
uint64_t word = p[1];
shiftcount = 12;
int width = api.getBitWidth();
for (int j=0; j<width; j+=4, shiftcount-=4) {
unsigned int nibble = (word>>shiftcount) & 15;
if (nibble < 10)
Out << (unsigned char)(nibble + '0');
else
Out << (unsigned char)(nibble - 10 + 'A');
if (shiftcount == 0 && j+4 < width) {
word = *p;
shiftcount = 64;
if (width-j-4 < 64)
shiftcount = width-j-4;
}
}
Out << format_hex_no_prefix(API.getHiBits(16).getZExtValue(), 4,
/*Upper=*/true);
Out << format_hex_no_prefix(API.getLoBits(64).getZExtValue(), 16,
/*Upper=*/true);
return;
} else if (&CFP->getValueAPF().getSemantics() == &APFloat::IEEEquad) {
shiftcount = 60;
Out << 'L';
Out << format_hex_no_prefix(API.getLoBits(64).getZExtValue(), 16,
/*Upper=*/true);
Out << format_hex_no_prefix(API.getHiBits(64).getZExtValue(), 16,
/*Upper=*/true);
} else if (&CFP->getValueAPF().getSemantics() == &APFloat::PPCDoubleDouble) {
shiftcount = 60;
Out << 'M';
Out << format_hex_no_prefix(API.getLoBits(64).getZExtValue(), 16,
/*Upper=*/true);
Out << format_hex_no_prefix(API.getHiBits(64).getZExtValue(), 16,
/*Upper=*/true);
} else if (&CFP->getValueAPF().getSemantics() == &APFloat::IEEEhalf) {
shiftcount = 12;
Out << 'H';
Out << format_hex_no_prefix(API.getZExtValue(), 4,
/*Upper=*/true);
} else
llvm_unreachable("Unsupported floating point type");
// api needed to prevent premature destruction
APInt api = CFP->getValueAPF().bitcastToAPInt();
const uint64_t* p = api.getRawData();
uint64_t word = *p;
int width = api.getBitWidth();
for (int j=0; j<width; j+=4, shiftcount-=4) {
unsigned int nibble = (word>>shiftcount) & 15;
if (nibble < 10)
Out << (unsigned char)(nibble + '0');
else
Out << (unsigned char)(nibble - 10 + 'A');
if (shiftcount == 0 && j+4 < width) {
word = *(++p);
shiftcount = 64;
if (width-j-4 < 64)
shiftcount = width-j-4;
}
}
return;
}