Reid Spencer
4af99334ea
Add a comment to explain a folding transform.
...
llvm-svn: 35360
2007-03-26 20:09:02 +00:00
Chris Lattner
f4ff1dc689
fold constantexprs more aggressively, fixing PR1265
...
llvm-svn: 35336
2007-03-25 05:47:04 +00:00
Reid Spencer
7a9c981d80
Fix constant fold of div by zero and rem by zero to match IEEE 754
...
requirements. We must return NaN in some cases and correctly signed
infinity in other cases. Passes CFP2006 (not that that says much).
llvm-svn: 35277
2007-03-23 05:33:23 +00:00
Reid Spencer
6037b564a0
Fix constant folding of fp->int bitcast for vectors.
...
llvm-svn: 34880
2007-03-03 08:32:46 +00:00
Reid Spencer
1f970769e8
Prefer non-virtual calls to ConstantInt::isZero over virtual calls to
...
Constant::isNullValue() in situations where it is possible.
llvm-svn: 34821
2007-03-02 00:28:52 +00:00
Reid Spencer
5790924b21
Use the APInt versions of the bit-wise conversions of float/double to int
...
and back. While this is not strictly necessary, it does pave the way for
future changes in casting. It should now be possible to improve vector
casting to deal with un-equal fp/int sizes.
llvm-svn: 34808
2007-03-01 20:44:23 +00:00
Reid Spencer
b0a7bfa105
Use a simpler constructor when constructing ConstantInst.
...
llvm-svn: 34793
2007-03-01 19:31:12 +00:00
Reid Spencer
24430077d5
Pull out the stops.
...
llvm-svn: 34703
2007-02-27 23:33:03 +00:00
Reid Spencer
8178fd7bd5
Adjust to changes in the APInt interface.
...
llvm-svn: 34681
2007-02-27 20:25:25 +00:00
Reid Spencer
a3b5b71616
For PR1205:
...
Implement review feedback:
1. Use new APInt::RoundDoubleToAPInt interface to specify the bit width so
that we don't have to truncate or extend in constant folding.
2. Fix a pasteo in SDiv that prevented a check for overflow.
3. Fix the shift operators: undef happens when the shift amount is equal
to the bitwidth.
llvm-svn: 34677
2007-02-27 19:29:54 +00:00
Reid Spencer
de3bbe0489
For PR1205:
...
Implement constant folding via APInt instead of uint64_t.
llvm-svn: 34660
2007-02-27 06:23:51 +00:00
Chris Lattner
ae7cc3e0e0
ConstantFolding.cpp/h -> ConstantFold.cpp/h to avoid confusion with
...
lib/Analysis/ConstantFolding.
llvm-svn: 34653
2007-02-27 03:05:06 +00:00
