Nate Begeman [Mon, 18 Oct 2004 21:08:22 +0000 (21:08 +0000)]
Initial implementation of the strength reduction for GEP instructions in
loops. This optimization is not turned on by default yet, but may be run
with the opt tool's -loop-reduce flag. There are many FIXMEs listed in the
code that will make it far more applicable to a wide range of code, but you
have to start somewhere :)
This limited version currently triggers on the following tests in the
MultiSource directory:
pcompress2: 7 times
cfrac: 5 times
anagram: 2 times
ks: 6 times
yacr2: 2 times
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17134
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Misha Brukman [Mon, 18 Oct 2004 18:35:21 +0000 (18:35 +0000)]
* AIX on Power defines INT64_MIN and INT64_MAX in ways that annoy GCC, so
special-case those definitions
* Add comments in #ifdef/#else/#endif clauses for ease of reading
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17132
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Misha Brukman [Mon, 18 Oct 2004 17:39:45 +0000 (17:39 +0000)]
AIX does not have mkdtemp() so emulate its behavior using mktemp() and mkdir()
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17131
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Chris Lattner [Mon, 18 Oct 2004 17:19:20 +0000 (17:19 +0000)]
Fix miscompilations in the SparcV9 backend that were induced by this patch:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-
20041011/019311.html
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17130
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Chris Lattner [Mon, 18 Oct 2004 15:54:17 +0000 (15:54 +0000)]
Improve compatibility with VC++, patch contributed by Morten Ofstad!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17126
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Chris Lattner [Mon, 18 Oct 2004 15:43:46 +0000 (15:43 +0000)]
Get this file compiling with VC++, patch contributed by Morten Ofstad. Thanks Morten!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17125
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Reid Spencer [Mon, 18 Oct 2004 14:43:45 +0000 (14:43 +0000)]
Declare a function in the correct namespace.
Patch contributed by Morten Ofstad. Thanks Morten!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17124
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Reid Spencer [Mon, 18 Oct 2004 14:38:48 +0000 (14:38 +0000)]
Correction to allow compilation with Visual C++.
Patch contributed by Morten Ofstad. Thanks Morten!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17123
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Chris Lattner [Mon, 18 Oct 2004 04:07:22 +0000 (04:07 +0000)]
Simplify code by deleting instructions that preceed unreachable instructions.
Simplify code by simplifying terminators that branch to blocks that start
with an unreachable instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17116
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Chris Lattner [Mon, 18 Oct 2004 04:06:41 +0000 (04:06 +0000)]
New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17115
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Reid Spencer [Mon, 18 Oct 2004 03:32:12 +0000 (03:32 +0000)]
Actually link all the analysis passes and their dependencies.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17114
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Reid Spencer [Mon, 18 Oct 2004 03:26:21 +0000 (03:26 +0000)]
Remove extra comma.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17113
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Reid Spencer [Mon, 18 Oct 2004 03:22:48 +0000 (03:22 +0000)]
Actually link in all the analysis passes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17112
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Chris Lattner [Mon, 18 Oct 2004 03:00:50 +0000 (03:00 +0000)]
Turn store -> null/undef into the LLVM unreachable instruction! This simple
change hacks off 10K of bytecode from perlbmk (.5%) even though the front-end
is not generating them yet and we are not optimizing the resultant code.
This isn't too bad.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17111
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Chris Lattner [Mon, 18 Oct 2004 02:59:09 +0000 (02:59 +0000)]
Turn things with obviously undefined semantics into 'store -> null'
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17110
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Chris Lattner [Mon, 18 Oct 2004 01:48:31 +0000 (01:48 +0000)]
My friend the invoke instruction does not dominate all basic blocks if it
occurs in the entry node of a function
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17109
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Chris Lattner [Mon, 18 Oct 2004 01:21:17 +0000 (01:21 +0000)]
Fix a bug that occurs when the constant value is the result of an invoke. In
particular, invoke ret values are only live in the normal dest of the invoke
not in the unwind dest.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17108
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Chris Lattner [Sun, 17 Oct 2004 23:49:11 +0000 (23:49 +0000)]
Print a semicolon for the unreacahble instruction. This fixes problems
where C requires semicolons in some cases to indicate null statements.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17107
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Chris Lattner [Sun, 17 Oct 2004 23:45:06 +0000 (23:45 +0000)]
Getting ADCE to interact well with unreachable instructions seems like a nontrivial
exercise that I'm not interested in tackling right now. Just punt and treat them
like unwind's.
This 'fixes' test/Regression/Transforms/ADCE/unreachable-function.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17106
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Chris Lattner [Sun, 17 Oct 2004 23:44:02 +0000 (23:44 +0000)]
New testcase that ADCE shouldn't crash on
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17105
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Chris Lattner [Sun, 17 Oct 2004 23:21:07 +0000 (23:21 +0000)]
Fix Regression/Transforms/Inline/2004-10-17-InlineFunctionWithoutReturn.ll
If a function had no return instruction in it, and the result of the inlined
call instruction was used, we would crash.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17104
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Chris Lattner [Sun, 17 Oct 2004 23:20:29 +0000 (23:20 +0000)]
New testcase that crashes the inliner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17103
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Nate Begeman [Sun, 17 Oct 2004 23:03:32 +0000 (23:03 +0000)]
Pass -single_module option to gcc when linking dynamic libraries for use with bugpoint, so that we can bugpoint multiple .cp files
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17102
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Nate Begeman [Sun, 17 Oct 2004 23:01:34 +0000 (23:01 +0000)]
Generate correct stubs for weak-linked symbols
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17101
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Chris Lattner [Sun, 17 Oct 2004 21:54:55 +0000 (21:54 +0000)]
fold gep undef, ... -> undef
This comes up many times in perlbmk and probably others.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17100
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Chris Lattner [Sun, 17 Oct 2004 21:31:34 +0000 (21:31 +0000)]
Remove printout, realize that instructions in the entry block dominate all
other blocks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17099
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Chris Lattner [Sun, 17 Oct 2004 21:25:56 +0000 (21:25 +0000)]
When inserting PHI nodes, don't insert any phi nodes that are obviously
unneccesary. This allows us to delete several hundred phi nodes of the
form PHI(x,x,x,undef) from 253.perlbmk and probably other programs as well.
This implements Mem2Reg/UndefValuesMerge.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17098
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Chris Lattner [Sun, 17 Oct 2004 21:25:32 +0000 (21:25 +0000)]
New testcase, no PHI should be inserted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17097
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Chris Lattner [Sun, 17 Oct 2004 21:23:26 +0000 (21:23 +0000)]
Enhance hasConstantValue to ignore undef values in phi nodes. This allows it
to think that PHI[4, undef] == 4.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17096
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Chris Lattner [Sun, 17 Oct 2004 21:22:38 +0000 (21:22 +0000)]
hasConstantValue will soon return instructions that don't dominate the PHI node,
so prepare for this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17095
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Chris Lattner [Sun, 17 Oct 2004 17:48:59 +0000 (17:48 +0000)]
The first hunk corrects a bug when printing undef null values. We would print
0->field, which is illegal. Now we print ((foo*)0)->field.
The second hunk is an optimization to not print undefined phi values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17094
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Chris Lattner [Sun, 17 Oct 2004 17:40:50 +0000 (17:40 +0000)]
Don't print stuff out from the code generator. This broke the JIT horribly
last night. :) bork!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17093
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Reid Spencer [Sun, 17 Oct 2004 17:07:29 +0000 (17:07 +0000)]
Add HAVE_BZLIB_H and HAVE_ZLIB_H tests.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17092
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Reid Spencer [Sun, 17 Oct 2004 15:02:47 +0000 (15:02 +0000)]
Update to reflect building zlib for LLVM
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17091
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Reid Spencer [Sun, 17 Oct 2004 15:01:59 +0000 (15:01 +0000)]
Add missing targets for install/clean
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17090
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Reid Spencer [Sun, 17 Oct 2004 15:01:12 +0000 (15:01 +0000)]
Make the library name SparcV9 specific
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17089
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Reid Spencer [Sun, 17 Oct 2004 15:00:26 +0000 (15:00 +0000)]
Consolidate the definitions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17088
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Reid Spencer [Sun, 17 Oct 2004 14:59:38 +0000 (14:59 +0000)]
PPC32GenCodeEmitter instead of PowerPCGenCodeEmitter
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17087
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Reid Spencer [Sun, 17 Oct 2004 14:58:49 +0000 (14:58 +0000)]
Add runtime directories
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17086
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Reid Spencer [Sun, 17 Oct 2004 14:57:12 +0000 (14:57 +0000)]
Support bytecode generation, GenCodeEmitter, etc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17085
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Reid Spencer [Sun, 17 Oct 2004 14:56:15 +0000 (14:56 +0000)]
Add runtime directory, include Makefile_rules
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17084
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Chris Lattner [Sun, 17 Oct 2004 08:01:28 +0000 (08:01 +0000)]
Rewrite support for cast uint -> FP. In particular, we used to compile this:
double %test(uint %X) {
%tmp.1 = cast uint %X to double ; <double> [#uses=1]
ret double %tmp.1
}
into:
test:
sub %ESP, 8
mov %EAX, DWORD PTR [%ESP + 12]
mov %ECX, 0
mov DWORD PTR [%ESP], %EAX
mov DWORD PTR [%ESP + 4], %ECX
fild QWORD PTR [%ESP]
add %ESP, 8
ret
... which basically zero extends to 8 bytes, then does an fild for an
8-byte signed int.
Now we generate this:
test:
sub %ESP, 4
mov %EAX, DWORD PTR [%ESP + 8]
mov DWORD PTR [%ESP], %EAX
fild DWORD PTR [%ESP]
shr %EAX, 31
fadd DWORD PTR [.CPItest_0 + 4*%EAX]
add %ESP, 4
ret
.section .rodata
.align 4
.CPItest_0:
.quad
5728578726015270912
This does a 32-bit signed integer load, then adds in an offset if the sign
bit of the integer was set.
It turns out that this is substantially faster than the preceeding sequence.
Consider this testcase:
unsigned a[2]={1,2};
volatile double G;
void main() {
int i;
for (i=0; i<
100000000; ++i )
G += a[i&1];
}
On zion (a P4 Xeon, 3Ghz), this patch speeds up the testcase from 2.140s
to 0.94s.
On apoc, an athlon MP 2100+, this patch speeds up the testcase from 1.72s
to 1.34s.
Note that the program takes 2.5s/1.97s on zion/apoc with GCC 3.3 -O3
-fomit-frame-pointer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17083
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Chris Lattner [Sun, 17 Oct 2004 07:49:45 +0000 (07:49 +0000)]
Unify handling of constant pool indexes with the other code paths, allowing
us to use index registers for CPI's
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17082
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Chris Lattner [Sun, 17 Oct 2004 07:16:32 +0000 (07:16 +0000)]
Give the asmprinter the ability to print memrefs with a constant pool index,
index reg and scale
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17081
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Chris Lattner [Sun, 17 Oct 2004 06:10:40 +0000 (06:10 +0000)]
fold:
%X = and Y, constantint
%Z = setcc %X, 0
instead of emitting:
and %EAX, 3
test %EAX, %EAX
je .LBBfoo2_2 # UnifiedReturnBlock
We now emit:
test %EAX, 3
je .LBBfoo2_2 # UnifiedReturnBlock
This triggers 581 times on 176.gcc for example.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17080
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Chris Lattner [Sun, 17 Oct 2004 05:37:47 +0000 (05:37 +0000)]
All of these labels are off by one now that the unreachable instruction exists
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17079
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Nate Begeman [Sun, 17 Oct 2004 05:19:20 +0000 (05:19 +0000)]
Implement bitfield insert by recognizing the following pattern:
1. optional shift left
2. and x, immX
3. and y, immY
4. or z, x, y
==> rlwimi z, x, y, shift, mask begin, mask end
where immX == ~immY and immX is a run of set bits. This transformation
fires 32 times on voronoi, once on espresso, and probably several
dozen times on external benchmarks such as gcc.
To put this in terms of actual code generated for
struct B { unsigned a : 3; unsigned b : 2; };
void storeA (struct B *b, int v) { b->a = v;}
void storeB (struct B *b, int v) { b->b = v;}
Old:
_storeA:
rlwinm r2, r4, 0, 29, 31
lwz r4, 0(r3)
rlwinm r4, r4, 0, 0, 28
or r2, r4, r2
stw r2, 0(r3)
blr
_storeB:
rlwinm r2, r4, 3, 0, 28
rlwinm r2, r2, 0, 27, 28
lwz r4, 0(r3)
rlwinm r4, r4, 0, 29, 26
or r2, r2, r4
stw r2, 0(r3)
blr
New:
_storeA:
lwz r2, 0(r3)
rlwimi r2, r4, 0, 29, 31
stw r2, 0(r3)
blr
_storeB:
lwz r2, 0(r3)
rlwimi r2, r4, 3, 27, 28
stw r2, 0(r3)
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17078
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Chris Lattner [Sun, 17 Oct 2004 04:01:51 +0000 (04:01 +0000)]
Fix constant folding relational operators with undef operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17077
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Chris Lattner [Sun, 17 Oct 2004 02:49:08 +0000 (02:49 +0000)]
Reid added --version to the CommandLine lib. Don't conflict with it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17076
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Chris Lattner [Sun, 17 Oct 2004 02:44:45 +0000 (02:44 +0000)]
I forgot that sparc no longer uses the shared asmwriter. Give it support
for undef.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17075
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Chris Lattner [Sun, 17 Oct 2004 02:42:42 +0000 (02:42 +0000)]
Add support for unreachable and undef
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17074
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Reid Spencer [Sun, 17 Oct 2004 00:24:24 +0000 (00:24 +0000)]
Initial Makefile.am for building with automake
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17073
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Reid Spencer [Sun, 17 Oct 2004 00:20:42 +0000 (00:20 +0000)]
Initial Makefile.am for building with automake.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17072
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Reid Spencer [Sun, 17 Oct 2004 00:17:54 +0000 (00:17 +0000)]
Make sure that for systems where the string functions are actually macros
that we undefine the macro before using its name in the definition. This
can happen on Linux if _GNU_SOURCE is defined.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17071
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Chris Lattner [Sat, 16 Oct 2004 23:31:32 +0000 (23:31 +0000)]
Implement constant folding of undef values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17070
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Chris Lattner [Sat, 16 Oct 2004 23:28:04 +0000 (23:28 +0000)]
Fix a type violation
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17069
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Nate Begeman [Sat, 16 Oct 2004 20:43:38 +0000 (20:43 +0000)]
Finally fix one of the oldest FIXMEs in the PowerPC backend: correctly
flag rotate left word immediate then mask insert (rlwimi) as a two-address
instruction, and update the ISel usage of the instruction accordingly.
This will allow us to properly schedule rlwimi, and use it to efficiently
codegen bitfield operations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17068
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Chris Lattner [Sat, 16 Oct 2004 19:46:33 +0000 (19:46 +0000)]
Kill the bogon that slipped into my buffer before I committed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17067
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Chris Lattner [Sat, 16 Oct 2004 19:44:59 +0000 (19:44 +0000)]
Implement InstCombine/getelementptr.ll:test9, which is the source of many
ugly and giant constnat exprs in some programs.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17066
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Chris Lattner [Sat, 16 Oct 2004 19:44:23 +0000 (19:44 +0000)]
New testcase, rework testcases to fail if there are any gep's other than those
involving %B instead of allowing any geps except %A's.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17065
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Misha Brukman [Sat, 16 Oct 2004 19:13:58 +0000 (19:13 +0000)]
* Add a space between words
* Wrap at 80 cols
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17064
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Chris Lattner [Sat, 16 Oct 2004 18:56:02 +0000 (18:56 +0000)]
Do not erroneously accept revision 6 bytecode files when the format hasn't
been defined yet!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17063
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Chris Lattner [Sat, 16 Oct 2004 18:35:57 +0000 (18:35 +0000)]
Update release notes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17062
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Chris Lattner [Sat, 16 Oct 2004 18:28:01 +0000 (18:28 +0000)]
New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17061
91177308-0d34-0410-b5e6-
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Chris Lattner [Sat, 16 Oct 2004 18:24:35 +0000 (18:24 +0000)]
Add support for undef and unreachable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17059
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Chris Lattner [Sat, 16 Oct 2004 18:24:11 +0000 (18:24 +0000)]
testcases for undefined and unreachable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17058
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Chris Lattner [Sat, 16 Oct 2004 18:21:50 +0000 (18:21 +0000)]
Fix fix fix
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17057
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Chris Lattner [Sat, 16 Oct 2004 18:21:33 +0000 (18:21 +0000)]
Add support for unreachable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17056
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Chris Lattner [Sat, 16 Oct 2004 18:19:26 +0000 (18:19 +0000)]
Add support for undef
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17055
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Chris Lattner [Sat, 16 Oct 2004 18:18:16 +0000 (18:18 +0000)]
Add support for undef, unreachable, and function flags
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17054
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Chris Lattner [Sat, 16 Oct 2004 18:17:13 +0000 (18:17 +0000)]
Parse undef and unreachable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17053
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Chris Lattner [Sat, 16 Oct 2004 18:16:19 +0000 (18:16 +0000)]
Add support
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17052
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Chris Lattner [Sat, 16 Oct 2004 18:14:10 +0000 (18:14 +0000)]
Add support for undef and unreachable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17051
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Chris Lattner [Sat, 16 Oct 2004 18:13:47 +0000 (18:13 +0000)]
ADd support for undef and unreachable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17050
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Chris Lattner [Sat, 16 Oct 2004 18:13:05 +0000 (18:13 +0000)]
Teach the X86 backend about unreachable and undef. Among other things, we
now compile:
'foo() {}' into "ret" instead of "mov EAX, 0; ret"
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17049
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Chris Lattner [Sat, 16 Oct 2004 18:12:13 +0000 (18:12 +0000)]
Add support for unreachable and undef
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17048
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Chris Lattner [Sat, 16 Oct 2004 18:11:37 +0000 (18:11 +0000)]
Optimize instructions involving undef values. For example X+undef == undef.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17047
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Chris Lattner [Sat, 16 Oct 2004 18:10:31 +0000 (18:10 +0000)]
Add support for UndefValue
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17046
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Chris Lattner [Sat, 16 Oct 2004 18:10:06 +0000 (18:10 +0000)]
When promoting mem2reg, make uninitialized values become undef isntead of 0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17045
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Chris Lattner [Sat, 16 Oct 2004 18:09:41 +0000 (18:09 +0000)]
Handle undef values as undefined on the constant lattice
ignore unreachable instructions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17044
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Chris Lattner [Sat, 16 Oct 2004 18:09:25 +0000 (18:09 +0000)]
Add note
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17043
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Chris Lattner [Sat, 16 Oct 2004 18:09:00 +0000 (18:09 +0000)]
Add support for the undef value. Implement a new optimization based on globals
that are initialized with undef. When promoting malloc to a global, start out
initialized to undef
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17042
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Chris Lattner [Sat, 16 Oct 2004 18:08:06 +0000 (18:08 +0000)]
Add support for undef and unreachable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17041
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Chris Lattner [Sat, 16 Oct 2004 18:07:16 +0000 (18:07 +0000)]
Implement UndefValue class
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17040
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Chris Lattner [Sat, 16 Oct 2004 18:06:43 +0000 (18:06 +0000)]
Add support for the unreachable instruction
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17039
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Chris Lattner [Sat, 16 Oct 2004 18:06:07 +0000 (18:06 +0000)]
Add new UndefValueVal type
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17038
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Chris Lattner [Sat, 16 Oct 2004 18:05:54 +0000 (18:05 +0000)]
Add new UnreachableInst class
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17037
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Chris Lattner [Sat, 16 Oct 2004 18:05:37 +0000 (18:05 +0000)]
Add new unreachable instruction
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17036
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Chris Lattner [Sat, 16 Oct 2004 18:05:25 +0000 (18:05 +0000)]
Add new UndefValue class
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17035
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Chris Lattner [Sat, 16 Oct 2004 18:05:10 +0000 (18:05 +0000)]
UndefValue's are constants
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17034
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Chris Lattner [Sat, 16 Oct 2004 18:04:13 +0000 (18:04 +0000)]
Document unreachable instruction
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17033
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Chris Lattner [Sat, 16 Oct 2004 18:03:55 +0000 (18:03 +0000)]
Add missing 'Instruction Opcodes' bullet to TOC
Update for changes in LLVM 1.4 bytecode format.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17032
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Chris Lattner [Sat, 16 Oct 2004 17:12:55 +0000 (17:12 +0000)]
Add a missing dependency
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17031
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Chris Lattner [Sat, 16 Oct 2004 16:37:42 +0000 (16:37 +0000)]
Fix file header
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17030
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Chris Lattner [Sat, 16 Oct 2004 16:07:10 +0000 (16:07 +0000)]
Be more careful about looking for constants when we really want constantint's.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17029
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Chris Lattner [Sat, 16 Oct 2004 00:29:30 +0000 (00:29 +0000)]
None of these have actually been implemented yet.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17027
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Chris Lattner [Fri, 15 Oct 2004 23:52:53 +0000 (23:52 +0000)]
Move the implementation of the instructions clone methods to this file so
that the vtables for these classes are only instantiated in this translation
unit, not in every xlation unit they are used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17026
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Chris Lattner [Fri, 15 Oct 2004 23:52:05 +0000 (23:52 +0000)]
Move the implementation of the clone method for these classes to
Instructions.cpp, so that a vtable is not emitted into every translation unit
that uses the classes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17025
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Misha Brukman [Fri, 15 Oct 2004 23:22:48 +0000 (23:22 +0000)]
Fix hyphenation and quoting style for great justice
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17024
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Chris Lattner [Fri, 15 Oct 2004 23:22:15 +0000 (23:22 +0000)]
There is no reason not to build these in parallel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17023
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