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26 Commits

Author SHA1 Message Date
Chris Lattner
e1fe7061ce land David Blaikie's patch to de-constify Type, with a few tweaks. 
llvm-svn: 135375
 2011-07-18 04:54:35 +00:00
Nick Lewycky
46eba338e9 Revert r133373. I was going to use this to teach the Verifier to verify constant 
expressions, but Chris wants to instead reduce the set of possible constant
expression types.

llvm-svn: 133374
 2011-06-19 03:30:32 +00:00
Nick Lewycky
5e8a997ea7 Add the remaining instructions/constant expressions as Operators so that code 
can manipulate instructions and constantexpr's uniformly. No users yet though.

llvm-svn: 133373
 2011-06-19 02:26:33 +00:00
Eli Friedman
f580be6fe3 PR9869: Add explicit destructor declarations to Operator subclasses, to allow 
compiling Operator.h with gcc 4.6 in C++0x mode.

llvm-svn: 131062
 2011-05-08 01:59:22 +00:00
Chris Lattner
2fd09e3397 implement .ll and .bc support for nsw/nuw on shl and exact on lshr/ashr. 
Factor some code better.

llvm-svn: 125006
 2011-02-07 16:40:21 +00:00
Duncan Sands
edd8383ed9 Add IRBuilder methods for creating an exact udiv, like for exact sdiv. 
llvm-svn: 125002
 2011-02-07 09:21:52 +00:00
Chris Lattner
7b6a968f5d enhance vmcore to know that udiv's can be exact, and add a trivial 
instcombine xform to exercise this.

Nothing forms exact udivs yet though.  This is progress on PR8862

llvm-svn: 124992
 2011-02-06 21:44:57 +00:00
Oscar Fuentes
2291919711 Avoid warnings about implicit conversions to `bool' in MSVC. This time 
for real.

Patch by Nathan Jeffords!

llvm-svn: 114796
 2010-09-25 20:27:36 +00:00
Oscar Fuentes
095c140c09 Avoid warnings about conversions to `bool' in MS compilers. 
Patch by Nathan Jeffords!

llvm-svn: 114662
 2010-09-23 16:59:44 +00:00
Eric Christopher
a7407c0921 Remove a bunch of unused arguments from functions, silencing a 
warning.

llvm-svn: 84130
 2009-10-14 20:28:33 +00:00
Chris Lattner
0cd0c5c98f add a helper method. 
llvm-svn: 82438
 2009-09-21 05:52:45 +00:00
Dan Gohman
1147a7ba87 Reappy r80998, now that the GlobalOpt bug that it exposed on MiniSAT is fixed. 
llvm-svn: 81172
 2009-09-07 23:54:19 +00:00
Daniel Dunbar
452643b58c Revert "Include optional subclass flags, such as inbounds, nsw, etc., ...", this 
breaks MiniSAT on x86_64.

llvm-svn: 81098
 2009-09-06 00:11:24 +00:00
Dan Gohman
8b386a0b63 Include optional subclass flags, such as inbounds, nsw, etc., in the 
Constant uniquing tables. This allows distinct ConstantExpr objects
with the same operation and different flags.

Even though a ConstantExpr "a + b" is either always overflowing or
never overflowing (due to being a ConstantExpr), it's still necessary
to be able to represent it both with and without overflow flags at
the same time within the IR, because the safety of the flag may
depend on the context of the use. If the constant really does overflow,
it wouldn't ever be safe to use with the flag set, however the use
may be in code that is never actually executed.

This also makes it possible to merge all the flags tests into a single test.

llvm-svn: 80998
 2009-09-04 12:08:11 +00:00
Dan Gohman
6ec8176e22 Rename hasNoUnsignedOverflow and hasNoSignedOverflow to hasNoUnsignedWrap 
and hasNoSignedWrap, for consistency with the nuw and nsw properties.

llvm-svn: 79539
 2009-08-20 17:11:38 +00:00
Dan Gohman
aeed373413 Add unimplemented destructor declarations to hopefully address 
compiler warnings on windows (PR4714).

llvm-svn: 78934
 2009-08-13 20:43:13 +00:00
Dan Gohman
1d382f0ee7 Avoid implicitly depending on Instructions.h. 
llvm-svn: 78681
 2009-08-11 17:03:18 +00:00
Dan Gohman
490eb36e1d Add a new keyword 'inbounds' for use with getelementptr. See the 
LangRef.html changes for details.

llvm-svn: 77259
 2009-07-27 21:53:46 +00:00
Dan Gohman
daf5eafa6a Order unsigned before signed, for consistency. 
llvm-svn: 77257
 2009-07-27 21:49:34 +00:00
Dan Gohman
beb449460a Add specific classes for Add, Sub, and Mul, for convenience. 
llvm-svn: 76981
 2009-07-24 18:12:25 +00:00
Dan Gohman
6f1417c7d0 Clarify that OverflowingBinaryOperator is not used for SDiv, even though 
SDiv is a binary operation that can overflow.

llvm-svn: 76464
 2009-07-20 20:32:43 +00:00
Dan Gohman
d0a2cef334 Drop UDivOperator and introduce SDivOperator. Thanks to Chris 
for noticing this.

llvm-svn: 76440
 2009-07-20 17:51:10 +00:00
Dan Gohman
00b05492f1 Revert the addition of hasNoPointerOverflow to GEPOperator. 
Getelementptrs that are defined to wrap are virtually useless to
optimization, and getelementptrs that are undefined on any kind
of overflow are too restrictive -- it's difficult to ensure that
all intermediate addresses are within bounds. I'm going to take
a different approach.

Remove a few optimizations that depended on this flag.

llvm-svn: 76437
 2009-07-20 17:43:30 +00:00
Dan Gohman
e45061eefe Convert more code to use Operator instead of explicitly handling both 
ConstantExpr and Instruction. This involves duplicating some code
between GetElementPtrInst and GEPOperator, but it's not a lot.

llvm-svn: 76265
 2009-07-17 23:55:56 +00:00
Dan Gohman
c639ee66f0 Add a GEPOperator class, and move the hasNoPointerOverflow 
accessors into it.

llvm-svn: 76245
 2009-07-17 21:33:58 +00:00
Dan Gohman
25a722cc45 Add a new Operator class, for handling Instructions and ConstantExprs 
in a convenient manner, factoring out some common code from
InstructionCombining and ValueTracking. Move the contents of
BinaryOperators.h into Operator.h and use Operator to generalize them
to support ConstantExprs as well as Instructions.

llvm-svn: 76232
 2009-07-17 20:47:02 +00:00