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11984 Commits

Author SHA1 Message Date
Chris Lattner
cc9eab26b3 Enhance earlycse to do CSE of casts, instsimplify and die. 
Add a testcase.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122715 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 23:04:14 +00:00
Chris Lattner
63f9c3c49a fix a miscompilation of tramp3d-v4: when forming a memcpy, we have to make 
sure that the loop we're promoting into a memcpy doesn't mutate the input
of the memcpy.  Before we were just checking that the dest of the memcpy
wasn't mod/ref'd by the loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122712 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 21:14:18 +00:00
Chris Lattner
8e08e73f0e If a loop iterates exactly once (has backedge count = 0) then don't 
mess with it.  We'd rather peel/unroll it than convert all of its 
stores into memsets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122711 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 20:24:21 +00:00
Benjamin Kramer
80220369b0 Try to reuse the value when lowering memset. 
This allows us to compile:
  void test(char *s, int a) {
    __builtin_memset(s, a, 15);
  }
into 1 mul + 3 stores instead of 3 muls + 3 stores.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122710 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 19:57:05 +00:00
Benjamin Kramer
8c06aa1c59 Lower the i8 extension in memset to a multiply instead of a potentially long series of shifts and ors. 
We could implement a DAGCombine to turn x * 0x0101 back into logic operations
on targets that doesn't support the multiply or it is slow (p4) if someone cares
enough.

Example code:
  void test(char *s, int a) {
      __builtin_memset(s, a, 4);
  }
before:
  _test:                                  ## @test
    movzbl  8(%esp), %eax
    movl  %eax, %ecx
    shll  $8, %ecx
    orl %eax, %ecx
    movl  %ecx, %eax
    shll  $16, %eax
    orl %ecx, %eax
    movl  4(%esp), %ecx
    movl  %eax, 4(%ecx)
    movl  %eax, (%ecx)
    ret
after:
  _test:                                  ## @test
    movzbl  8(%esp), %eax
    imull $16843009, %eax, %eax   ## imm = 0x1010101
    movl  4(%esp), %ecx
    movl  %eax, 4(%ecx)
    movl  %eax, (%ecx)
    ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122707 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 19:44:58 +00:00
Chris Lattner
62c50fdf69 enhance loop idiom recognition to scan *all* unconditionally executed 
blocks in a loop, instead of just the header block.  This makes it more
aggressive, able to handle Duncan's Ada examples.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122704 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 19:01:03 +00:00
Duncan Sands
67fb341f8b Fix PR8702 by not having LoopSimplify claim to preserve LCSSA form. As described 
in the PR, the pass could break LCSSA form when inserting preheaders.  It probably
would be easy enough to fix this, but since currently we always go into LCSSA form
after running this pass, doing so is not urgent.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122695 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 13:38:21 +00:00
Chris Lattner
cf078f2b20 Allow loop-idiom to run on multiple BB loops, but still only scan the loop 
header for now for memset/memcpy opportunities.  It turns out that loop-rotate
is successfully rotating loops, but *DOESN'T MERGE THE BLOCKS*, turning "for 
loops" into 2 basic block loops that loop-idiom was ignoring.

With this fix, we form many *many* more memcpy and memsets than before, including
on the "history" loops in the viterbi benchmark, which look like this:

        for (j=0; j<MAX_history; ++j) {
          history_new[i][j+1] = history[2*i][j];
        }

Transforming these loops into memcpy's speeds up the viterbi benchmark from
11.98s to 3.55s on my machine.  Woo.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122685 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 07:58:36 +00:00
Chris Lattner
e2c4392091 teach loop idiom recognition to form memcpy's from simple loops. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122678 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 03:37:56 +00:00
Chris Lattner
d91ed10b70 fix a globalopt crash on two Adobe-C++ testcases that the recent 
loop idiom pass exposed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122674 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 22:31:46 +00:00
Rafael Espindola
1acf707cce Fix darwin bots. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122672 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 21:58:41 +00:00
Rafael Espindola
03277e7fb4 Add support for the 'H' modifier. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122667 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 20:58:46 +00:00
Anton Korobeynikov
1db58f936b Update the test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122666 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 20:57:26 +00:00
Chris Lattner
bafa117e8f add a validity check that was missed, fixing a crash on the 
new testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122662 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 20:12:04 +00:00
Duncan Sands
124708d9b4 Revert commit 122654 at the request of Chris, who reckons that instsimplify 
is the wrong hammer for this nail, and is probably right.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122661 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 20:08:02 +00:00
Chris Lattner
a64cbf067d improve validity check to handle constant-trip-count loops more 
aggressively.  In practice, this doesn't help anything though,
see the todo.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122660 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 19:54:22 +00:00
Chris Lattner
30980b6815 implement the "no aliasing accesses in loop" safety check. This pass 
should be correct now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122659 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 19:39:01 +00:00
Rafael Espindola
7a54997d67 Fix PR8878. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122658 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 19:05:35 +00:00
Duncan Sands
7cf85e74e3 Fix a README item by having InstructionSimplify do a mild form of value 
numbering, in which it considers (for example) "%a = add i32 %x, %y" and
"%b = add i32 %x, %y" to be equal because the operands are equal and the
result of the instructions only depends on the values of the operands.
This has almost no effect (it removes 4 instructions from gcc-as-one-file),
and perhaps slows down compilation: I measured a 0.4% slowdown on the large
gcc-as-one-file testcase, but it wasn't statistically significant.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122654 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 16:12:09 +00:00
Che-Liang Chiou
c88e91b875 ptx: remove reg-reg addressing mode and st.const 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122653 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 11:58:58 +00:00
Che-Liang Chiou
ad83c1d383 ptx: add store instruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122652 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-01 10:50:37 +00:00
Nick Lewycky
c00210cef2 Add another non-commutable instruction that gas accepts commuted forms for. 
Fixes PR8861.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122641 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-30 22:10:49 +00:00
Che-Liang Chiou
d34f19f7ba ptx: add state spaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122638 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-30 10:41:27 +00:00
Daniel Dunbar
b2624eda5a MC/Mach-O/Thumb: Set the thumb bit in the symbol table. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122630 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-29 14:14:06 +00:00
Rafael Espindola
caf1158b0f Correctly encode pcrel|indirect. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122624 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-29 04:31:26 +00:00
NAKAMURA Takumi
5c083b174e test/Transforms/ConstProp/logicaltest.ll: FileCheck-ize. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122620 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-29 03:58:56 +00:00
NAKAMURA Takumi
e5eff5f6a2 test/CodeGen/X86/negative-sin.ll: FileCheck-ize. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122619 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-29 03:58:47 +00:00
NAKAMURA Takumi
a9eb163261 test/CodeGen/X86/fp-in-intregs.ll: FileCheck-ize. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122618 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-29 03:58:36 +00:00
Rafael Espindola
a7e450574c Fix bug when trying to output uint16_t or uint32_t. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122615 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-29 02:30:49 +00:00
Rafael Espindola
b40a71fda1 Implement cfi_def_cfa. Also don't convert to dwarf reg numbers twice. Looks 
like 6 is a fixed point of that and so the previous tests were OK :-)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122614 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-29 01:42:56 +00:00
Rafael Espindola
b4601bd2ff Implement cfi_def_cfa_register. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122612 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-29 00:26:06 +00:00
Rafael Espindola
b790a17efb Initial .cfi_offset implementation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122611 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-29 00:09:59 +00:00
Rafael Espindola
3b78cdc57a Don't produce a "DW_CFA_advance_loc 0". 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122609 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-28 23:38:03 +00:00
Rafael Espindola
fe024d0a62 Implement .cfi_remember_state and .cfi_restore_state. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122602 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-28 18:36:23 +00:00
Rafael Espindola
245a1e2041 Relax address updates in the eh_frame section. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122591 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-28 05:39:27 +00:00
Rafael Espindola
5bba084253 Start adding basic support for emitting the call frame instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122590 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-28 04:15:37 +00:00
Rafael Espindola
bdc3167c08 Add support for .cfi_lsda. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122584 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-27 15:56:22 +00:00
Daniel Dunbar
e862453806 MC/Mach-O/Thumb: Select appropriate relocation types for Thumb. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122583 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-27 14:49:49 +00:00
Rafael Espindola
c3a561cb8e Handle reloc_riprel_4byte_movq_load. Should make the bots happy. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122579 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-27 02:03:24 +00:00
Rafael Espindola
3a83c40ab6 Add support for the same encodings of the personality function that gnu as 
supports.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122577 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-27 00:36:05 +00:00
Chris Lattner
a92ff91a96 implement enough of the memset inference algorithm to recognize and insert 
memsets.  This is still missing one important validity check, but this is enough
to compile stuff like this:

void test0(std::vector<char> &X) {
  for (std::vector<char>::iterator I = X.begin(), E = X.end(); I != E; ++I)
    *I = 0;
}

void test1(std::vector<int> &X) {
  for (long i = 0, e = X.size(); i != e; ++i)
    X[i] = 0x01010101;
}

With:
 $ clang t.cpp -S -o - -O2 -emit-llvm | opt -loop-idiom | opt -O3 | llc 

to:

__Z5test0RSt6vectorIcSaIcEE:            ## @_Z5test0RSt6vectorIcSaIcEE
## BB#0:                                ## %entry
	subq	$8, %rsp
	movq	(%rdi), %rax
	movq	8(%rdi), %rsi
	cmpq	%rsi, %rax
	je	LBB0_2
## BB#1:                                ## %bb.nph
	subq	%rax, %rsi
	movq	%rax, %rdi
	callq	___bzero
LBB0_2:                                 ## %for.end
	addq	$8, %rsp
	ret
...
__Z5test1RSt6vectorIiSaIiEE:            ## @_Z5test1RSt6vectorIiSaIiEE
## BB#0:                                ## %entry
	subq	$8, %rsp
	movq	(%rdi), %rax
	movq	8(%rdi), %rdx
	subq	%rax, %rdx
	cmpq	$4, %rdx
	jb	LBB1_2
## BB#1:                                ## %for.body.preheader
	andq	$-4, %rdx
	movl	$1, %esi
	movq	%rax, %rdi
	callq	_memset
LBB1_2:                                 ## %for.end
	addq	$8, %rsp
	ret



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122573 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-26 23:42:51 +00:00
Chris Lattner
61db1f56d0 start using irbuilder to make mem intrinsics in a few passes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122572 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-26 22:57:41 +00:00
Rafael Espindola
98976610d2 Add support for @note. Patch by Jörg Sonnenberger. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122568 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-26 21:30:59 +00:00
Rafael Espindola
d7c8ccae8e Add basic support for .cfi_personality. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122566 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-26 20:20:31 +00:00
Chris Lattner
7ab3cc32d6 Generalize a previous change, fixing PR8855 - an valid large immediate 
rejected by the mc assembler.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122557 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-25 21:36:35 +00:00
Benjamin Kramer
a112087e42 MemCpyOpt: Turn memcpys from a constant into a memset if possible. 
This allows us to compile "int cst[] = {-1, -1, -1};" into
  movl  $-1, 16(%rsp)
  movq  $-1, 8(%rsp)
instead of
  movl  _cst+8(%rip), %eax
  movl  %eax, 16(%rsp)
  movq  _cst(%rip), %rax
  movq  %rax, 8(%rsp)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122548 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-24 21:17:12 +00:00
Daniel Dunbar
4010dd72b8 MC/Mach-O/ARM: Start handling some Thumb branches. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122547 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-24 16:41:46 +00:00
Kevin Enderby
d82ed5b734 In llvm-mc parse a Hash token as a full line comment. Allows handling of 
preprocessed .s files and matches darwin gas.  rdar://8798690
Also fix a comment on the next line of AsmParser.cpp after this new code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122531 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-24 00:12:02 +00:00
Owen Anderson
ec3953ff95 When determining if we can fold (x >> C1) << C2, the bits that we need to verify are zero 
are not the low bits of x, but the bits that WILL be the low bits after the operation completes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122529 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-23 23:56:24 +00:00
Bob Wilson
3c904694fc Radar 8803471: Fix expansion of ARM BCCi64 pseudo instructions. 
If the basic block containing the BCCi64 (or BCCZi64) instruction ends with
an unconditional branch, that branch needs to be deleted before appending
the expansion of the BCCi64 to the end of the block.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122521 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-23 22:45:49 +00:00