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3623 Commits

Author SHA1 Message Date
Evan Cheng
f44c72817e VarInfo::UsedBlocks is no longer used. Remove. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36250 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 05:04:38 +00:00
Chris Lattner
61a4c072b9 allow SRL to simplify its operands, as it doesn't demand all bits as input. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36245 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 03:06:49 +00:00
Chris Lattner
ec06e9a670 When replacing a node in SimplifyDemandedBits, if the old node used any 
single-use nodes, they will be dead soon.  Make sure to remove them before
processing other nodes.  This implements CodeGen/X86/shl_elim.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36244 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 03:05:22 +00:00
Chris Lattner
0a16a1f738 fix a pasto 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36242 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 03:01:40 +00:00
Evan Cheng
faf05bbaea Don't populate TryAgainList when coalescing only physical registers with virtual registers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36240 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 02:30:19 +00:00
Evan Cheng
3fefc182a0 Increment use count of new virtuals created during PHI elimination. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36233 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 00:36:11 +00:00
Chris Lattner
8c7d2d56bf Fix a bug in my previous patch, grabbing the shift amount width from the 
wrong operand.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36223 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 22:53:02 +00:00
Chris Lattner
895c4ab564 Fold (x << c1)>> c2 into a single shift if the bits shifted out aren't used. 
This compiles:
int baz(long long a) { return (short)(((int)(a >>24)) >> 9); }

into:
_baz:
        srwi r2, r3, 1
        extsh r3, r2
        blr

on PPC, instead of:
_baz:
        slwi r2, r3, 8
        srwi r2, r2, 9
        extsh r3, r2
        blr

GCC produces:
_baz:
        srwi r10,r4,24
        insrwi r10,r3,24,0
        srawi r9,r3,24
        srawi r3,r10,9
        extsh r3,r3
        blr

This implements CodeGen/PowerPC/shl_elim.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36221 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 21:14:16 +00:00
Evan Cheng
20b0abc24f Copy coalescing change to prevent a physical register from being pin to a 
long live interval that has low usage density.
1. Change order of coalescing to join physical registers with virtual
   registers first before virtual register intervals become too long.
2. Check size and usage density to determine if it's worthwhile to join.
3. If joining is aborted, assign virtual register live interval allocation
   preference field to the physical register.
4. Register allocator should try to allocate to the preferred register
   first (if available) to create identify moves that can be eliminated.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36218 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 20:32:26 +00:00
Evan Cheng
e52eef8e9a Add a register allocation preference field; add a method to compute size of a live interval. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36216 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 20:25:11 +00:00
Evan Cheng
38b7ca6651 Keep track of number of uses within the function per virtual register. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36214 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 20:22:11 +00:00
Chris Lattner
95a5e0507e SIGN_EXTEND_INREG does not demand its top bits. Give SimplifyDemandedBits 
a chance to hack on it.  This compiles:

int baz(long long a) { return (short)(((int)(a >>24)) >> 9); }

into:
_baz:
        slwi r2, r3, 8
        srwi r2, r2, 9
        extsh r3, r2
        blr

instead of:

_baz:
        srwi r2, r4, 24
        rlwimi r2, r3, 8, 0, 23
        srwi r2, r2, 9
        extsh r3, r2
        blr

This implements CodeGen/PowerPC/sign_ext_inreg1.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36212 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 19:03:21 +00:00
Reid Spencer
9a9203b894 Fix problems in the PartSet lowering having to do with incorrect bit width. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36180 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-16 22:21:14 +00:00
Anton Korobeynikov
bed2946a96 Removed tabs everywhere except autogenerated & external files. Add make 
target for tabs checking.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36146 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-16 18:10:23 +00:00
Chris Lattner
1c35968d4d disable switch lowering using shift/and. It still breaks ppc bootstrap for 
some reason.  :(  Will investigate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36011 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 19:39:41 +00:00
Anton Korobeynikov
e01017bba4 Fix PR1325: Case range optimization was performed in the case it 
shouldn't. Also fix some "latent" bug on 64-bit platforms


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35990 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 13:25:55 +00:00
Chris Lattner
3ff981749b disable shift/and lowering to work around PR1325 for now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35985 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 02:26:56 +00:00
Anton Korobeynikov
8085bcfdca Fix PR1323 : we haven't updated phi nodes in good manner :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35963 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-13 06:53:51 +00:00
Reid Spencer
df41353497 Make sure intrinsics that are lowered to functions make the function weak 
linkage so we only end up with one of them in a program. These are, after
all overloaded and templatish in nature.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35956 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-12 21:53:38 +00:00
Reid Spencer
eeedcb6905 Fix bugs in generated code for part_select and part_set so that llc doesn't 
barf when CBE is run with a program that contains these intrinsics.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35946 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-12 13:30:14 +00:00
Reid Spencer
37958093c6 Fix a bug in PartSet. The replacement value needs to be zext or trunc to 
the size of the value, not just zext. Also, give better names to two BBs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35945 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-12 12:46:33 +00:00
Chris Lattner
3a508c94a6 the result of an inline asm copy can be an arbitrary VT that the register 
class supports.  In the case of vectors, this means we often get the wrong
type (e.g. we get v4f32 instead of v8i16).  Make sure to convert the vector
result to the right type.  This fixes CodeGen/X86/2007-04-11-InlineAsmVectorResult.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35944 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-12 06:00:20 +00:00
Chris Lattner
4829b1c6ab fold noop vbitconvert instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35943 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-12 05:58:43 +00:00
Chris Lattner
c2941779c3 Fix weirdness handling single element vectors. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35941 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-12 04:44:28 +00:00
Reid Spencer
f75b874957 For PR1284: 
Implement the "part_set" intrinsic.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35938 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-12 02:48:46 +00:00
Chris Lattner
c24bbaddf8 fix an infinite loop compiling ldecod, notice by JeffC. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35910 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 16:51:53 +00:00
Chris Lattner
1eba01e9a0 Fix this harder. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35888 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 06:50:51 +00:00
Chris Lattner
c56a81dff1 don't create shifts by zero, fix some problems with my previous patch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35887 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 06:43:25 +00:00
Chris Lattner
20a35c3fa5 Teach the codegen to turn [aez]ext (setcc) -> selectcc of 1/0, which often 
allows other simplifications.  For example, this compiles:
int isnegative(unsigned int X) {
   return !(X < 2147483648U);
}

Into this code:

x86:
        movl 4(%esp), %eax
        shrl $31, %eax
        ret
arm:
        mov r0, r0, lsr #31
        bx lr
thumb:
        lsr r0, r0, #31
        bx lr

instead of:

x86:
        cmpl $0, 4(%esp)
        sets %al
        movzbl %al, %eax
        ret

arm:
        mov r3, #0
        cmp r0, #0
        movlt r3, #1
        mov r0, r3
        bx lr

thumb:
        mov r2, #1
        mov r1, #0
        cmp r0, #0
        blt LBB1_2      @entry
LBB1_1: @entry
        cpy r2, r1
LBB1_2: @entry
        cpy r0, r2
        bx lr

Testcase here: test/CodeGen/Generic/ispositive.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35883 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 05:32:27 +00:00
Chris Lattner
1982ef20c4 Codegen integer abs more efficiently using the trick from the PPC CWG. This 
improves codegen on many architectures.  Tests committed as CodeGen/*/iabs.ll

X86 Old:			X86 New:
_test:				_test:
   movl 4(%esp), %ecx		   movl 4(%esp), %eax
   movl %ecx, %eax		   movl %eax, %ecx
   negl %eax			   sarl $31, %ecx
   testl %ecx, %ecx		   addl %ecx, %eax
   cmovns %ecx, %eax		   xorl %ecx, %eax
   ret				   ret

PPC Old:			PPC New:
_test:				_test:
   cmpwi cr0, r3, -1		   srawi r2, r3, 31
   neg r2, r3			   add r3, r3, r2
   bgt cr0, LBB1_2 ;		   xor r3, r3, r2
LBB1_1: ;			   blr
   mr r3, r2
LBB1_2: ;
   blr

ARM Old:			ARM New:
_test:				_test:
   rsb r3, r0, #0		   add r3, r0, r0, asr #31
   cmp r0, #0			   eor r0, r3, r0, asr #31
   movge r3, r0			   bx lr
   mov r0, r3
   bx lr

Thumb Old:			Thumb New:
_test:				_test:
   neg r2, r0			   asr r2, r0, #31
   cmp r0, #0			   add r0, r0, r2
   bge LBB1_2			   eor r0, r2
LBB1_1: @			   bx lr
   cpy r0, r2
LBB1_2: @
   bx lr


Sparc Old:			Sparc New:
test:				test:
   save -96, %o6, %o6		   save -96, %o6, %o6
   sethi 0, %l0			   sra %i0, 31, %l0
   sub %l0, %i0, %l0		   add %i0, %l0, %l1
   subcc %i0, -1, %l1		   xor %l1, %l0, %i0
   bg .BB1_2			   restore %g0, %g0, %g0
   nop				   retl
.BB1_1:				   nop
   or %g0, %l0, %i0
.BB1_2:
   restore %g0, %g0, %g0
   retl
   nop

It also helps alpha/ia64 :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35881 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 05:11:38 +00:00
Reid Spencer
18da072088 For PR1146: 
Put the parameter attributes in their own ParamAttr name space. Adjust the
rest of llvm as a result.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35877 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 02:44:20 +00:00
Chris Lattner
c6eb6d7255 apparently some people commit without building the tree, or they forget to 
commit a LOT of files.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35858 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-10 03:20:39 +00:00
Jeff Cohen
2da8da46ba No longer needed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35850 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 23:42:32 +00:00
Chris Lattner
2b95fd67da remove dead target hooks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35847 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 23:34:08 +00:00
Chris Lattner
b445d0cbb9 remove some dead target hooks, subsumed by isLegalAddressingMode 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35840 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 22:27:04 +00:00
Anton Korobeynikov
54e2b142be Use integer log for metric calculation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35834 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 21:57:03 +00:00
Jeff Cohen
efc3662636 Unbreak VC++ build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35817 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 14:32:59 +00:00
Anton Korobeynikov
4198c58c71 Next stage into switch lowering refactoring 
1. Fix some bugs in the jump table lowering threshold
2. Implement much better metric for optimal pivot selection
3. Tune thresholds for different lowering methods
4. Implement shift-and trick for lowering small (<machine word
length) cases with few destinations. Good testcase will follow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35816 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 12:31:58 +00:00
Reid Spencer
5694b6e90e For PR1146: 
Adapt handling of parameter attributes to use the new ParamAttrsList class.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35814 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 06:17:21 +00:00
Chris Lattner
1a6acc214d implement CodeGen/X86/inline-asm-x-scalar.ll:test3 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35802 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 05:31:20 +00:00
Chris Lattner
ff33cc4d08 add some assertions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35800 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 05:23:13 +00:00
Chris Lattner
0ebe9c132c Fix a bug introduced with my previous patch, where it didn't correctly handle 
instructions which replace themselves when FI's are rewritten (common on ppc).
This fixes CodeGen/PowerPC/2006-10-17-ppc64-alloca.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35789 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 01:19:33 +00:00
Chris Lattner
d2eae62e93 Fix CodeGen/Generic/2007-04-08-MultipleFrameIndices.ll and PR1308: 
some instructions can have multiple frame indices in them.  If this happens,
rewrite all of them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35785 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 00:46:10 +00:00
Chris Lattner
4b993b19f9 Fix PR1316 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35783 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 00:33:58 +00:00
Chris Lattner
921169b103 Fix for CodeGen/X86/2007-04-08-InlineAsmCrash.ll and PR1314 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35779 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-08 22:23:26 +00:00
Chris Lattner
e303ac9052 minor comment fix 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35696 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-06 17:47:14 +00:00
Reid Spencer
3f108cb555 Change the bit_part_select (non)implementation from "return 0" to abort. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35679 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-05 01:20:18 +00:00
Reid Spencer
addd11d98e Implement the llvm.bit.part_select.iN.iN.iN overloaded intrinsic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35678 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-04 23:48:25 +00:00
Anton Korobeynikov
5502bf67cd Properly emit range comparisons for switch cases, where neighbour cases 
go to the same destination. Now we're producing really good code for
switch-lower-feature.ll testcase


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35672 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-04 21:14:49 +00:00
Evan Cheng
9193514e2e Re-materialize all loads from fixed stack slots. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35660 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-04 07:40:01 +00:00