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Author SHA1 Message Date
Chris Lattner
0dc11e140e Update to new-style flags usage, simplifying the .td file 
llvm-svn: 26106
 2006-02-10 06:58:25 +00:00
Evan Cheng
53c409e694 Remove a completed entry; add a new entry about fisttp op 
llvm-svn: 26105
 2006-02-10 05:48:15 +00:00
Chris Lattner
8d28872523 add some notes, move some code around. Implement unswitching of loops 
with branches on partially invariant computations.

llvm-svn: 26104
 2006-02-10 02:30:37 +00:00
Chris Lattner
e51f996026 Move code around to be more logical, no functionality change. 
llvm-svn: 26103
 2006-02-10 02:01:22 +00:00
Chris Lattner
4432cd73f2 When unswitching a trivial loop, do admit we are doing it! :) 
llvm-svn: 26102
 2006-02-10 01:36:35 +00:00
Chris Lattner
eef362d63e Implement unconditional unswitching of 'trivial' loops, those loops that contain 
branches in their entry block that control whether or not the loop is a noop or not.

llvm-svn: 26101
 2006-02-10 01:24:09 +00:00
Chris Lattner
602fc20596 Simplify control flow a bit, note that unswitch preserves canonical loop form 
llvm-svn: 26098
 2006-02-09 22:15:42 +00:00
Evan Cheng
d491020c15 Match tblgen change. 
llvm-svn: 26096
 2006-02-09 22:12:53 +00:00
Evan Cheng
e8a0e56482 Call InsertISelMapEntry rather than map insertion operator to prevent overly 
aggrssive inlining. This reduces Select_store frame size from 24k to 10k.

llvm-svn: 26095
 2006-02-09 22:12:27 +00:00
Evan Cheng
7441e03b0b Added SelectionDAG::InsertISelMapEntry(). This is used to workaround the gcc 
problem where it inline the map insertion call too aggressively. Before this
change it was producing a frame size of 24k for Select_store(), now it's down
to 10k (by calling this method rather than calling the map insertion operator).

llvm-svn: 26094
 2006-02-09 22:11:03 +00:00
Chris Lattner
19acace8c0 Make the threshold a parameter 
llvm-svn: 26093
 2006-02-09 20:15:48 +00:00
Chris Lattner
4e9d16a0ad Done 
llvm-svn: 26091
 2006-02-09 20:00:19 +00:00
Chris Lattner
5a10d24e67 Enable LSR by default for SPARC: it is a clear win. 
llvm-svn: 26090
 2006-02-09 19:59:55 +00:00
Chris Lattner
4ae405113a Simplify the loop-unswitch pass, by not even trying to unswitch loops with 
uses of loop values outside the loop.  We need loop-closed SSA form to do
this right, or to use SSA rewriting if we really care.

llvm-svn: 26089
 2006-02-09 19:14:52 +00:00
Chris Lattner
08e2215a18 Fix 80-column violations 
llvm-svn: 26088
 2006-02-09 07:41:14 +00:00
Chris Lattner
dcb3481968 Enhance MVIZ in three ways: 
1. Teach it new tricks: in particular how to propagate through signed shr and sexts.
2. Teach it to return a bitset of known-1 and known-0 bits, instead of just zero.
3. Teach instcombine (AND X, C) to fold when we know all C bits of X.

This implements Regression/Transforms/InstCombine/bittest.ll, and allows
future things to be simplified.

llvm-svn: 26087
 2006-02-09 07:38:58 +00:00
Chris Lattner
1ad0bfc2f0 new testcase 
llvm-svn: 26086
 2006-02-09 07:38:30 +00:00
Evan Cheng
6bd0f9c4ba Match getTargetNode() changes (now return SDNode* instead of SDOperand). 
llvm-svn: 26085
 2006-02-09 07:17:49 +00:00
Evan Cheng
fd9315eaaa Match getTargetNode() changes (now returns SDNode* instead of SDOperand). 
llvm-svn: 26084
 2006-02-09 07:16:09 +00:00
Evan Cheng
3486292b7d More changes to reduce frame size. 
Move all getTargetNode() out of SelectionDAG.h into SelectionDAG.cpp. This
prevents them from being inlined.
Change getTargetNode() so they return SDNode * instead of SDOperand to prevent
copying. It should also help compilation speed.

llvm-svn: 26083
 2006-02-09 07:15:23 +00:00
Chris Lattner
d033cbb057 this apparently passes on linux 
llvm-svn: 26082
 2006-02-09 07:12:13 +00:00
Chris Lattner
8eae5f68d5 add an option to turn on LSR. 
llvm-svn: 26080
 2006-02-09 05:06:36 +00:00
Chris Lattner
e976315aec simplify this code now that each constant pool entry is not separately allocated 
llvm-svn: 26079
 2006-02-09 04:49:59 +00:00
Chris Lattner
c81f375f21 Adjust to MachineConstantPool interface change: instead of keeping a 
value/alignment pair for each constant, keep a value/offset pair.

llvm-svn: 26078
 2006-02-09 04:46:04 +00:00
Chris Lattner
7775687364 instead of keeping track of Constant/alignment pairs, actually compute the 
offset of each entry from the start of the constant pool.

llvm-svn: 26077
 2006-02-09 04:44:32 +00:00
Chris Lattner
1111a4b76d rename fields of constant pool entries 
llvm-svn: 26076
 2006-02-09 04:22:52 +00:00
Chris Lattner
10af703b36 Use a MachineConstantPoolEntry struct instead of a pair to hold 
constant pool entries.

llvm-svn: 26075
 2006-02-09 04:21:49 +00:00
Chris Lattner
837a816470 Simplify code, alignment must be specified now. 
llvm-svn: 26074
 2006-02-09 02:26:04 +00:00
Chris Lattner
f9e38897e3 Assert invariants 
llvm-svn: 26073
 2006-02-09 02:25:42 +00:00
Chris Lattner
309539fb45 Require an alignment. 
llvm-svn: 26072
 2006-02-09 02:24:25 +00:00
Chris Lattner
86d5e100d2 Make MachineConstantPool entries alignments explicit 
llvm-svn: 26071
 2006-02-09 02:23:13 +00:00
Chris Lattner
79b2108a41 Always pass in an alignment. 
llvm-svn: 26070
 2006-02-09 02:19:16 +00:00
Chris Lattner
3ff29575b8 provide an explicit alignment for cp entries 
llvm-svn: 26069
 2006-02-09 02:15:30 +00:00
Chris Lattner
70865ea43f Add a comment: value is log2 
llvm-svn: 26068
 2006-02-09 02:10:15 +00:00
Evan Cheng
521e5a1bfe Change Select() from 
SDOperand Select(SDOperand N);
to
void Select(SDOperand &Result, SDOperand N);

llvm-svn: 26067
 2006-02-09 00:37:58 +00:00
Chris Lattner
2e1a495967 Darwin doesn't support #APP/#NO_APP 
llvm-svn: 26066
 2006-02-08 23:42:22 +00:00
Chris Lattner
6556f15ad8 Add support for assembler directives that wrap inline asm 
llvm-svn: 26065
 2006-02-08 23:41:56 +00:00
Chris Lattner
47ef931412 Rename BSel -> PPCBSel for the benefit of doxygen users. 
Move the methods out of line.
Remove unused Debug.h stuff.
Teach getNumBytesForInstruction to know the size of an inline asm.

llvm-svn: 26064
 2006-02-08 19:33:26 +00:00
Jim Laskey
8b27e1cdb8 Disable this test for the time being as debug is brought up to speed. 
llvm-svn: 26063
 2006-02-08 18:17:06 +00:00
Chris Lattner
9cc9988279 add a simple optimization 
llvm-svn: 26062
 2006-02-08 17:47:22 +00:00
Chris Lattner
bd0325a506 Mention that delta can be used to reduce some Front-end problems. 
Patch by Marco Matthies, thanks!

llvm-svn: 26061
 2006-02-08 17:01:37 +00:00
Chris Lattner
73022962e9 Add SRoA to the lexicon. Patch by Marco Matthies! 
llvm-svn: 26060
 2006-02-08 16:59:49 +00:00
Evan Cheng
bde468bac5 Added options -cflag, -cxxflags, and -ldflags to override the default C 
compilation, C++ compilation, and linker options.
e.g. This is the options I use for testing on my x86 iMac:
nice ./NightlyTest.pl -release -cflags "-Os -DNDEBUG -fomit-frame-pointer" -cxxflags "-Os -DNDEBUG -finline-functions -felide-constructors -fomit-frame-pointer"

llvm-svn: 26057
 2006-02-08 09:08:06 +00:00
Chris Lattner
f2caea42c9 Simplify some code, reducing calls to MaskedValueIsZero. Implement a minor 
optimization where we reduce the number of bits in AND masks when possible.

llvm-svn: 26056
 2006-02-08 07:34:50 +00:00
Evan Cheng
c66d006526 Remove -pedantic. It no longer works. 
llvm-svn: 26055
 2006-02-08 07:28:22 +00:00
Chris Lattner
560429667e more email -> README moving 
llvm-svn: 26054
 2006-02-08 07:12:07 +00:00
Chris Lattner
86d1dcf613 Emit the 'mr' pseudoop for easier reading. 
llvm-svn: 26053
 2006-02-08 06:56:40 +00:00
Chris Lattner
a4b6082b7a Add some random notes, not high-prio 
llvm-svn: 26052
 2006-02-08 06:52:06 +00:00
Chris Lattner
881c8c12ff Move emails from nate into public places 
llvm-svn: 26051
 2006-02-08 06:43:51 +00:00
Chris Lattner
8359f9fbbb 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).

llvm-svn: 26050
 2006-02-08 03:25:32 +00:00