Commit Graph

9656 Commits

Author SHA1 Message Date
Chris Lattner
5f0378251c move comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101433 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16 01:05:52 +00:00
Chris Lattner
d55c1c1659 fix PR6832: we were using the alignment of a pointer when we
wanted the alignment of the pointee.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101432 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16 01:05:38 +00:00
Johnny Chen
cd52932dce Added another test case for am3offset operand, testing Rn, #+/-imm8.
Previous checkin tested Rn, #+/-Rm.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101418 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 23:23:40 +00:00
Jakob Stoklund Olesen
4b231c5705 Add test case for machine-sink on critical edges
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101416 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 23:19:16 +00:00
Johnny Chen
1cfa094562 Fixed a bug in ARM disassembly where LDRSBT should have am3offset operand, not
am2offset.  Modified the instruction table entry and added a new test case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101415 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 23:12:47 +00:00
Evan Cheng
3a1588a2e3 Use default lowering of DYNAMIC_STACKALLOC. As far as I can tell, ARM isle is doing the right thing and codegen looks correct for both Thumb and Thumb2.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101410 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 22:20:34 +00:00
Jakob Stoklund Olesen
5ef9d76f6f Fix PR6847. RegScavenger should ignore DebugValues.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101392 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 20:28:39 +00:00
Evan Cheng
0ea7d219ec ARM SelectDYN_ALLOC should emit a copy from SP rather than referencing SP directly. In cases where there are two dyn_alloc in the same BB it would have caused the old SP value to be reused and badness ensues. rdar://7493908
llvm is generating poor code for dynamic alloca, I'll fix that later.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101383 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 18:42:28 +00:00
Chris Lattner
e6987587d6 enhance the load/store narrowing optimization to handle a
tokenfactor in between the load/store.  This allows us to 
optimize test7 into:

_test7:                                 ## @test7
## BB#0:                                ## %entry
	movl	(%rdx), %eax
                                        ## kill: SIL<def> ESI<kill>
	movb	%sil, 5(%rdi)
	ret

instead of:

_test7:                                 ## @test7
## BB#0:                                ## %entry
	movl	4(%esp), %ecx
	movl	$-65281, %eax           ## imm = 0xFFFFFFFFFFFF00FF
	andl	4(%ecx), %eax
	movzbl	8(%esp), %edx
	shll	$8, %edx
	addl	%eax, %edx
	movl	12(%esp), %eax
	movl	(%eax), %eax
	movl	%edx, 4(%ecx)
	ret



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101355 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 06:10:49 +00:00
Chris Lattner
6dc868581b teach codegen to turn trunc(zextload) into load when possible.
This doesn't occur much at all, it only seems to formed in the case
when the trunc optimization kicks in due to phase ordering.  In that
case it is saves a few bytes on x86-32.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101350 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 05:40:59 +00:00
Chris Lattner
efcddc3325 add a simple dag combine to replace trivial shl+lshr with
and.  This happens with the store->load narrowing stuff.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101348 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 05:28:43 +00:00
Chris Lattner
2392ae7d73 Implement rdar://7860110 (also in target/readme.txt) narrowing
a load/or/and/store sequence into a narrower store when it is
safe.  Daniel tells me that clang will start producing this sort
of thing with bitfields, and this does  trigger a few dozen times
on 176.gcc produced by llvm-gcc even now.

This compiles code like CodeGen/X86/2009-05-28-DAGCombineCrash.ll 
into:

        movl    %eax, 36(%rdi)

instead of:

        movl    $4294967295, %eax       ## imm = 0xFFFFFFFF
        andq    32(%rdi), %rax
        shlq    $32, %rcx
        addq    %rax, %rcx
        movq    %rcx, 32(%rdi)

and each of the testcases into a single store.  Each of them used
to compile into craziness like this:

_test4:
	movl	$65535, %eax            ## imm = 0xFFFF
	andl	(%rdi), %eax
	shll	$16, %esi
	addl	%eax, %esi
	movl	%esi, (%rdi)
	ret




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101343 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 04:48:01 +00:00
Chris Lattner
dc7d6c9ddc further tweak this to do something useful.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101341 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 04:31:42 +00:00
Chris Lattner
23ab896c13 remove undef control flow.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101340 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 04:30:19 +00:00
Daniel Dunbar
4c7276a4eb tests: MC/Disassembler tests depend on ARM support being compiler in.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101337 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15 03:47:20 +00:00
Jakob Stoklund Olesen
d394e272d2 Remove unneeded types from test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101286 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14 20:56:09 +00:00
Bob Wilson
164cd8b8d3 Don't custom lower bit converts to ARM VMOVDRRD or VMOVDRR when the operand
does not have a legal type.  The legalizer does not know how to handle those
nodes.  Radar 7854640.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101282 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14 20:45:23 +00:00
Evan Cheng
dda54eef23 Trim tests and convert to FileCheck.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101277 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14 20:22:17 +00:00
Nick Lewycky
3715e45da5 Revert r101213.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101231 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14 04:51:58 +00:00
Chris Lattner
d305035155 implement mc asmparser support for '.', which gets the
current PC.  rdar://7834775

We now produce an identical .o file compared to the cctools
assembler for something like this:

_f0:
L0:
        jmp L1
        .long . - L0
L1:
        jmp A
        .long . - L1

        .zerofill __DATA,_bss,A,0



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101227 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14 04:40:28 +00:00
Nick Lewycky
05f1498efa Commit testcase for r101213.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101214 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14 03:46:42 +00:00
Devang Patel
7cc11ce5a6 XFAIL this test for powerpc.
This test relies on iSel lowering dbg_declare intrinsic when CodeGen::OptLevel is None. On PPC side, CodeGen::OptLevel stays to default when -O0 is used on the command line.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101190 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 23:23:09 +00:00
Evan Cheng
370aac4a28 Add test for post-ra machine licm.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101182 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 22:10:03 +00:00
Bob Wilson
6a234f07fa Handle a v2f64 formal parameter that is split between registers and memory
such that the entire second half is in memory.  Radar 7855014.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101181 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 22:03:22 +00:00
Devang Patel
50d80e394d Do not include types without any definition in pubtypes list.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101171 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 20:35:04 +00:00
Evan Cheng
005de5ef33 Fix test on non-x86 hosts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101163 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 18:54:04 +00:00
Evan Cheng
fc5a03e469 Re-apply 101075 and fix it properly. Just reuse the debug info of the branch instruction being optimized. There is no need to --I which can deref off start of the BB.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101162 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 18:50:27 +00:00
Eric Christopher
97e6992e3e Temporarily revert r101075, it's causing invalid iterator assertions
in a nightly tester.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101158 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 18:37:58 +00:00
Dan Gohman
28287794d4 Teach ScalarEvolution to simplify smax and umax when it can prove
that one operand is always greater than another.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101142 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 16:51:03 +00:00
Dan Gohman
a590b79ee2 Teach IndVarSimplify how to eliminate remainder operators where the
numerator is an induction variable. For example, with code like this:

  for (i=0;i<n;++i)
    x[i%n] = 0;

IndVarSimplify will now recognize that i is always less than n inside
the loop, and eliminate the remainder.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101113 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 01:46:36 +00:00
Chris Lattner
43ac721e3b add llvm codegen support for -ffunction-sections and -fdata-sections,
patch by Sylvere Teissier!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101106 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 00:36:43 +00:00
Evan Cheng
82865a10f8 Use .set expression for x86 pic jump table reference to reduce assembly relocation. rdar://7738756
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101085 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 23:07:17 +00:00
Bill Wendling
8cc21cac89 Third time's a charm...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101081 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 22:43:21 +00:00
Bill Wendling
476e62c459 Genericize the label test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101079 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 22:40:37 +00:00
Bill Wendling
35fe23157f Correct test to test what I mean it to test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101077 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 22:25:42 +00:00
Bill Wendling
2aae6ae572 Micro-optimization:
If we have this situation:

    jCC  L1
    jmp  L2
L1:
  ...
L2:
  ...

We can get a small performance boost by emitting this instead:

    jnCC L2
L1:
  ...
L2:
  ...

This testcase shows an example of this:

float func(float x, float y) {
    double product = (double)x * y;
    if (product == 0.0)
        return product;
    return product - 1.0;
}



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101075 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 22:19:57 +00:00
Dan Gohman
ca9b7037e2 Suppress LinearFunctionTestReplace when the computed backedge-taken
expression is a UDiv and it doesn't appear that the UDiv came from
the user's source.

ScalarEvolution has recently figured out how to compute a tripcount
expression for the inner loop in
SingleSource/Benchmarks/Shootout/sieve.c, using a udiv. Emitting a
udiv instruction dramatically slows down the enclosing loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101068 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 21:13:43 +00:00
Johnny Chen
bb6e9d8cf7 Fixed a crasher in arm disassembler within ARMInstPrinter.cpp after calling
ARM_AM::getSoImmVal(V) with a legitimate so_imm value: #245 rotate right by 2.
Introduce ARM_AM::getSOImmValOneOrNoRotate(unsigned Arg) which is called from
ARMInstPrinter.cpp's printSOImm() function, replacing ARM_AM::getSOImmVal(V).

[12:44:43] johnny:/Volumes/data/llvm/git/trunk (local-trunk) $ gdb Debug/bin/llvm-mc
GNU gdb 6.3.50-20050815 (Apple version gdb-1346) (Fri Sep 18 20:40:51 UTC 2009)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin"...Reading symbols for shared libraries ... done

(gdb) set args  -triple=arm-apple-darwin9 -debug-only=arm-disassembler --disassemble
(gdb) r
Starting program: /Volumes/data/llvm/git/trunk/Debug/bin/llvm-mc -triple=arm-apple-darwin9 -debug-only=arm-disassembler --disassemble
Reading symbols for shared libraries ++. done
0xf5 0x71 0xf0 0x53
Opcode=201 Name=MVNi Format=ARM_FORMAT_DPFRM(4)
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0 
-------------------------------------------------------------------------------------------------
| 0: 1: 0: 1| 0: 0: 1: 1| 1: 1: 1: 1| 0: 0: 0: 0| 0: 1: 1: 1| 0: 0: 0: 1| 1: 1: 1: 1| 0: 1: 0: 1|
-------------------------------------------------------------------------------------------------

	mvnpls	r7, Assertion failed: (V != -1 && "Not a valid so_imm value!"), function printSOImm, file ARMInstPrinter.cpp, line 229.

Program received signal SIGABRT, Aborted.
0x00007fff88c65886 in __kill ()
(gdb) bt
#0  0x00007fff88c65886 in __kill ()
#1  0x00007fff88d05eae in abort ()
#2  0x00007fff88cf2ef0 in __assert_rtn ()
#3  0x000000010020e422 in printSOImm (O=@0x1010bdf80, V=-1, VerboseAsm=false, MAI=0x1020106d0) at ARMInstPrinter.cpp:229
#4  0x000000010020e5fe in llvm::ARMInstPrinter::printSOImmOperand (this=0x1020107e0, MI=0x7fff5fbfee70, OpNum=1, O=@0x1010bdf80) at ARMInstPrinter.cpp:254
#5  0x00000001001ffbc0 in llvm::ARMInstPrinter::printInstruction (this=0x1020107e0, MI=0x7fff5fbfee70, O=@0x1010bdf80) at ARMGenAsmWriter.inc:3236
#6  0x000000010020c27c in llvm::ARMInstPrinter::printInst (this=0x1020107e0, MI=0x7fff5fbfee70, O=@0x1010bdf80) at ARMInstPrinter.cpp:182
#7  0x000000010003cbff in PrintInsts (DisAsm=@0x10200f4e0, Printer=@0x1020107e0, Bytes=@0x7fff5fbff060, SM=@0x7fff5fbff078) at Disassembler.cpp:65
#8  0x000000010003c8b4 in llvm::Disassembler::disassemble (T=@0x1010c13c0, Triple=@0x1010b6798, Buffer=@0x102010690) at Disassembler.cpp:153
#9  0x000000010004095c in DisassembleInput (ProgName=0x7fff5fbff3f0 "/Volumes/data/llvm/git/trunk/Debug/bin/llvm-mc") at llvm-mc.cpp:347
#10 0x000000010003eefb in main (argc=4, argv=0x7fff5fbff298) at llvm-mc.cpp:374
(gdb) q
The program is running.  Exit anyway? (y or n) y
[13:36:26] johnny:/Volumes/data/llvm/git/trunk (local-trunk) $ 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101053 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 18:46:53 +00:00
Dan Gohman
27dead44e0 Generalize ScalarEvolution's PHI analysis to handle loops that don't
have preheaders or dedicated exit blocks, as clients may not otherwise
need to run LoopSimplify.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101030 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 07:49:36 +00:00
Evan Cheng
09010a30fd Enable post regalloc machine licm by default.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101023 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 06:25:28 +00:00
Eric Christopher
67a71b5306 Verify function prototypes before trying to optimize functions. We also
need TargetData, just return false if we don't have it.

Update testcases accordingly.

Fixes PR6807.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101011 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 04:48:00 +00:00
Dan Gohman
931e345e76 Re-apply r101000, with a fix: Don't eliminate an icmp which is part of
the loop exit test. This usually doesn't come up for a variety of
reasons, but it isn't impossible, so make IndVarSimplify handle it
conservatively.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101008 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 02:21:50 +00:00
Dan Gohman
ac3b9cdf15 Revert 101000, which is breaking self-host builds.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101002 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12 00:17:10 +00:00
Dan Gohman
3fddbb337d Teach IndVarSimplify how to eliminate comparisons involving induction
variables. For example, with code like this:

  for (i=0;i<n;++i)
    if (i<n)
      x[i] = 0;

IndVarSimplify will now recognize that i is always less than n inside
the loop, and eliminate the if.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101000 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-11 23:10:12 +00:00
Chris Lattner
6f285d2105 fix PR6743, a case where we'd delete an instruction before using it
in some cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100937 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-10 18:26:57 +00:00
Chris Lattner
a2fb234b04 fix PR6760, a missing check in heap SRoA.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100936 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-10 18:19:22 +00:00
Dan Gohman
e5f76877ae When determining a canonical insert position, don't climb deeper
into adjacent loops. Also, ensure that the insert position is
dominated by the loop latch of any loop in the post-inc set which
has a latch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100906 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-09 22:07:05 +00:00
Dan Gohman
f8d0578e4c When emitting code for an add, don't force a SCEVUnknown wrapper around
a hoisted intermediate result if the intermediate result isn't an
Instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100884 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-09 19:14:31 +00:00
Benjamin Kramer
232c8b4d26 Make sure this test tests something.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100879 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-09 19:03:31 +00:00
Bob Wilson
f5c3f8cda5 Add a testcase for svn r100568.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100876 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-09 18:29:29 +00:00