Commit Graph

2254 Commits

Author SHA1 Message Date
Chris Lattner
7560c3af83 Simplify some code, reducing calls to MaskedValueIsZero. Implement a minor
optimization where we reduce the number of bits in AND masks when possible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26056 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-08 07:34:50 +00:00
Chris Lattner
9ca96410fc Use EraseInstFromFunction in a few cases to put the uses of the removed
instruction onto the worklist (in case they are now dead).

Add a really trivial local DSE implementation to help out bitfield code.
We now fold this:

struct S {
    unsigned char a : 1, b : 1, c : 1, d : 2, e : 3;
    S();
};

S::S() : a(0), b(0), c(1), d(0), e(6) {}

to this:

void %_ZN1SC1Ev(%struct.S* %this) {
entry:
        %tmp.1 = getelementptr %struct.S* %this, int 0, uint 0
        store ubyte 38, ubyte* %tmp.1
        ret void
}

much earlier (in gccas instead of only in gccld after DSE runs).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26050 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-08 03:25:32 +00:00
Chris Lattner
fe243ebb64 Implement some more interesting select sccp cases. This implements:
test/Regression/Transforms/SCCP/select.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26049 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-08 02:38:11 +00:00
Chris Lattner
62d1ade893 Fix a problem in my patch yesterday, causing a miscompilation of 176.gcc
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26045 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-08 01:20:23 +00:00
Chris Lattner
d89d888cc5 Fix Transforms/InstCombine/2006-02-07-SextZextCrash.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26040 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-07 19:07:40 +00:00
Chris Lattner
74c51a0ff2 Generalize MaskedValueIsZero into a ComputeMaskedNonZeroBits function, which
is just as efficient as MVIZ and is also more general.

Fix a few minor bugs introduced in recent patches


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26036 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-07 08:05:22 +00:00
Chris Lattner
3bedbd9d71 Make MaskedValueIsZero take a uint64_t instead of a ConstantIntegral as a
mask.  This allows the code to be simpler and more efficient.

Also, generalize some of the cases in MVIZ a bit, making it slightly more aggressive.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26035 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-07 07:27:52 +00:00
Chris Lattner
1a074fce15 Use Type::getIntegralTypeMask() to simplify some code
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26034 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-07 07:00:41 +00:00
Chris Lattner
6dce1a7dfe Implement the beginnings of a facility for simplifying expressions based on
'demanded bits', inspired by Nate's work in the dag combiner.  This isn't
complete, but needs to unrelated instcombiner changes to continue.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26033 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-07 06:56:34 +00:00
Chris Lattner
5f3b0eeddb Turn A % (C << N), where C is 2^k, into A & ((C << N)-1) [urem only].
Turn A / (C1 << N), where C1 is "1<<C2" into A >> (N+C2) [udiv only].

Tested with: rem.ll:test5, div.ll:test10


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26003 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-05 07:54:04 +00:00
Chris Lattner
0a70f219f4 Use SCEVExpander::InsertCastOfTo instead of our own code. This reduces
#LLVM LOC, and auto-cse's cast instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25974 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-04 09:52:43 +00:00
Chris Lattner
221fc3c6d6 Fix two significant bugs in LSR:
1. When rewriting code in outer loops, sometimes we would insert code into
   inner loops that is invariant in that loop.
2. Notice that 4*(2+x) is 8+4*x and use that to simplify expressions.

This is a performance neutral change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25964 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-04 07:36:50 +00:00
Jeff Cohen
9471c8a93b Improve compatibility with VC2005, patch by Morten Ofstad!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25661 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-26 20:41:32 +00:00
Chris Lattner
f47a6b4882 teach the cloner to handle inline asms
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25633 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-26 01:55:22 +00:00
Chris Lattner
15256cb14e Fix Regression/Transforms/ScalarRepl/2006-01-24-IllegalUnionPromoteCrash.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25587 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-24 19:36:27 +00:00
Chris Lattner
3e2fa7a746 rename method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25572 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-24 04:16:34 +00:00
Chris Lattner
9771aeafca When cloning a module, clone the inline asm.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25559 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-23 23:06:28 +00:00
Chris Lattner
e46f6e99a0 add a bunch more optimizations for unary double math functions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25530 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-23 06:24:46 +00:00
Chris Lattner
7070c5f241 Refactor/genericize this, no functionality change
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25525 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-23 05:57:36 +00:00
Chris Lattner
dac58ad983 Make iostream #inclusion explicit
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25514 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-22 23:32:06 +00:00
Chris Lattner
e05cf71616 Make this more efficient in the following ways:
1. Do not statically construct a map when the program starts up, this
   is expensive and cannot be optimized.  Instead, create a list.
2. Do not insert entries for all function in the module into a hashmap
   that lives the full life of the compiler.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25512 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-22 23:10:26 +00:00
Chris Lattner
86a5484079 Add explicit #includes of <iostream>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25509 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-22 22:53:01 +00:00
Chris Lattner
0f9f8c3759 Several non-functionality changing changes:
1. Use the varargs version of getOrInsertFunction to simplify code.
2. remove #include
3. Reduce the number of #ifdef's.
4. remove extraneous vertical whitespace.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25508 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-22 22:35:08 +00:00
Robert Bocchino
d900c6a8b3 ConstantFoldLoadThroughGEPConstantExpr wasn't handling pointers to
packed types correctly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25470 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-19 23:53:23 +00:00
Reid Spencer
aa87e0523d For PR696:
Don't do floor->floorf conversion if floorf is not available. This checks
the compiler's host, not its target, which is incorrect for cross-compilers
Not sure that's important as we don't build many cross-compilers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25456 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-19 08:36:56 +00:00
Chris Lattner
bc528efa76 Implement casts.ll:test26: a cast from float -> double -> integer, doesn't
need the float->double part.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25452 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-19 07:40:22 +00:00
Chris Lattner
727552bb89 If not internalizing, don't mark llvm.global[cd]tors const, as a fix for a
hypothetical future boog.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25430 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-19 00:46:54 +00:00
Chris Lattner
ee9e14cb8a Don't internalize llvm.global[cd]tor unless there are uses of it. This
unbreaks front-ends that don't use __main (like the new CFE).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25429 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-19 00:40:39 +00:00
Chris Lattner
c4e8c9f318 Make sure that cloning a module clones its target triple and dependent
library list as well.  This should help bugpoint.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25424 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-18 21:32:45 +00:00
Robert Bocchino
956fd7254f Constant folding support for the insertelement operation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25407 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-17 20:07:07 +00:00
Robert Bocchino
8fcf01ead0 Lowerpacked and SCCP support for the insertelement operation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25406 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-17 20:06:55 +00:00
Chris Lattner
f91e97ae81 Clean up the FFS optimization code, and make it correctly create the appropriate
unsigned llvm.cttz.* intrinsic, fixing the 2005-05-11-Popcount-ffs-fls regression
last night.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25398 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-17 18:27:17 +00:00
Reid Spencer
0b118206bf For PR411:
This patch is an incremental step towards supporting a flat symbol table.
It de-overloads the intrinsic functions by providing type-specific intrinsics
and arranging for automatically upgrading from the old overloaded name to
the new non-overloaded name. Specifically:
  llvm.isunordered -> llvm.isunordered.f32, llvm.isunordered.f64
  llvm.sqrt -> llvm.sqrt.f32, llvm.sqrt.f64
  llvm.ctpop -> llvm.ctpop.i8, llvm.ctpop.i16, llvm.ctpop.i32, llvm.ctpop.i64
  llvm.ctlz -> llvm.ctlz.i8, llvm.ctlz.i16, llvm.ctlz.i32, llvm.ctlz.i64
  llvm.cttz -> llvm.cttz.i8, llvm.cttz.i16, llvm.cttz.i32, llvm.cttz.i64
New code should not use the overloaded intrinsic names. Warnings will be
emitted if they are used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25366 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-16 21:12:35 +00:00
Chris Lattner
72223eea95 fix a crash due to missing parens
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25363 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-16 19:47:21 +00:00
Chris Lattner
57a47d6a4b This pass has never worked correctly. Remove.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25349 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-16 01:06:00 +00:00
Chris Lattner
432a205769 Let the inliner update the callgraph to reflect the changes it makes, instead
of doing it ourselves.  This fixes Transforms/Inline/2006-01-14-CallGraphUpdate.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25321 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-14 20:09:18 +00:00
Chris Lattner
468fb1df7d Teach the inliner to update the CallGraph itself, and have it add edges to
llvm.stacksave/restore when it inserts calls to them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25320 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-14 20:07:50 +00:00
Chris Lattner
516a74c01a FunctionPass's cannot do IPO things.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25315 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-14 19:30:35 +00:00
Nate Begeman
6fb3bd6a65 Add bswap intrinsics as documented in the Language Reference
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25309 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-14 01:25:24 +00:00
Robert Bocchino
1d7456d0bf Added instcombine support for extractelement.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25299 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-13 22:48:06 +00:00
Chris Lattner
5522037136 it is ok to dce stacksave.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25295 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-13 21:31:54 +00:00
Chris Lattner
a728ddc815 Do a simple instcombine xforms to delete llvm.stackrestore cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25294 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-13 21:28:09 +00:00
Chris Lattner
8b0ea313d9 Simplify this a tiny bit by using the new IntrinsicInst functionality.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25292 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-13 20:11:04 +00:00
Chris Lattner
ccca3ca85f Permit inlining functions that contain dynamic allocations now that
InlineFunction handles this case safely.  This implements
Transforms/Inline/dynamic_alloca_test.ll.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25288 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-13 19:35:43 +00:00
Chris Lattner
bf229f488a If inlining a call to a function that contains dynamic allocas, wrap the
resultant code with llvm.stacksave/llvm.stackrestore intrinsics.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25286 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-13 19:34:14 +00:00
Chris Lattner
1fdf4a859f Use ClonedCodeInfo to avoid another walk over the inlined code, this this
time in common C cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25285 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-13 19:18:11 +00:00
Chris Lattner
727d1dd587 Use the ClonedCodeInfo object to avoid scans of the inlined code when
it doesn't contain any calls.  This is a fairly common case for C++ code,
so it will probably speed up the inliner marginally in these cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25284 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-13 19:15:15 +00:00
Chris Lattner
cd4d339ec1 Refactor a bunch of invoke handling stuff out into a new function
"HandleInlinedInvoke".  No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25283 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-13 19:05:59 +00:00
Chris Lattner
a4c29d2037 Allow the code cloning interfaces to capture some important info about the
code being cloned if the client wants.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25281 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-13 18:39:17 +00:00
Chris Lattner
21f20558d6 Fix a bug I noticed by inspection: if the first instruction in the inlined
function was not an alloca, we wouldn't check the entry block for any allocas,
leading to increased stack space in some cases.  In practice, allocas are almost
always at the top of the block, so this was never noticed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25280 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-13 18:16:48 +00:00