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PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and

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zextOrTrunc(), and APSInt methods extend(), extOrTrunc() and new method
trunc(), to be const and to return a new value instead of modifying the
object in place.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121120 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jay Foad
2010-12-07 08:25:19 +00:00
parent 0ea112f104
commit 40f8f6264d
25 changed files with 219 additions and 251 deletions
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6
lib/Support/APFloat.cpp
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@ -3310,7 +3310,7 @@ namespace {
// Truncate the significand down to its active bit count, but
// don't try to drop below 32.
unsigned newPrecision = std::max(32U, significand.getActiveBits());
significand.trunc(newPrecision);
significand = significand.trunc(newPrecision);
}
@ -3415,7 +3415,7 @@ void APFloat::toString(SmallVectorImpl<char> &Str,
// Nothing to do.
} else if (exp > 0) {
// Just shift left.
significand.zext(semantics->precision + exp);
significand = significand.zext(semantics->precision + exp);
significand <<= exp;
exp = 0;
} else { /* exp < 0 */
@ -3434,7 +3434,7 @@ void APFloat::toString(SmallVectorImpl<char> &Str,
// Multiply significand by 5^e.
// N * 5^0101 == N * 5^(1*1) * 5^(0*2) * 5^(1*4) * 5^(0*8)
significand.zext(precision);
significand = significand.zext(precision);
APInt five_to_the_i(precision, 5);
while (true) {
if (texp & 1) significand *= five_to_the_i;