[llvm-commits] CVS: llvm/lib/Target/CBackend/Writer.cpp
Jim Laskey
jlaskey at apple.com
Wed Aug 17 12:30:56 PDT 2005
Changes in directory llvm/lib/Target/CBackend:
Writer.cpp updated: 1.242 -> 1.243
---
Log message:
Culling out use of unions for converting FP to bits and vice versa.
---
Diffs of the changes: (+5 -20)
Writer.cpp | 25 +++++--------------------
1 files changed, 5 insertions(+), 20 deletions(-)
Index: llvm/lib/Target/CBackend/Writer.cpp
diff -u llvm/lib/Target/CBackend/Writer.cpp:1.242 llvm/lib/Target/CBackend/Writer.cpp:1.243
--- llvm/lib/Target/CBackend/Writer.cpp:1.242 Thu Jul 14 14:41:16 2005
+++ llvm/lib/Target/CBackend/Writer.cpp Wed Aug 17 14:30:44 2005
@@ -32,6 +32,7 @@
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/InstVisitor.h"
#include "llvm/Support/Mangler.h"
+#include "llvm/Support/MathExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/MathExtras.h"
@@ -585,14 +586,10 @@
const unsigned long SignalNaN = 0x7ff4UL;
// We need to grab the first part of the FP #
- union {
- double d;
- uint64_t ll;
- } DHex;
char Buffer[100];
- DHex.d = FPC->getValue();
- sprintf(Buffer, "0x%llx", (unsigned long long)DHex.ll);
+ uint64_t ll = DoubleToBits(FPC->getValue());
+ sprintf(Buffer, "0x%llx", (unsigned long long)ll);
std::string Num(&Buffer[0], &Buffer[6]);
unsigned long Val = strtoul(Num.c_str(), 0, 16);
@@ -953,16 +950,6 @@
/// Output all floating point constants that cannot be printed accurately...
void CWriter::printFloatingPointConstants(Function &F) {
- union {
- double D;
- uint64_t U;
- } DBLUnion;
-
- union {
- float F;
- unsigned U;
- } FLTUnion;
-
// Scan the module for floating point constants. If any FP constant is used
// in the function, we want to redirect it here so that we do not depend on
// the precision of the printed form, unless the printed form preserves
@@ -979,14 +966,12 @@
FPConstantMap[FPC] = FPCounter; // Number the FP constants
if (FPC->getType() == Type::DoubleTy) {
- DBLUnion.D = Val;
Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
- << " = 0x" << std::hex << DBLUnion.U << std::dec
+ << " = 0x" << std::hex << DoubleToBits(Val) << std::dec
<< "ULL; /* " << Val << " */\n";
} else if (FPC->getType() == Type::FloatTy) {
- FLTUnion.F = Val;
Out << "static const ConstantFloatTy FPConstant" << FPCounter++
- << " = 0x" << std::hex << FLTUnion.U << std::dec
+ << " = 0x" << std::hex << FloatToBits(Val) << std::dec
<< "U; /* " << Val << " */\n";
} else
assert(0 && "Unknown float type!");
More information about the llvm-commits
mailing list