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2006-09-23Style changes only. Remove dead code, fix a comment.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30588 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-23Be far more careful when splitting a loop header, either to form a preheaderChris Lattner
or when splitting loops with a common header into multiple loops. In particular the old code would always insert the preheader before the old loop header. This is disasterous in cases where the loop hasn't been rotated. For example, it can produce code like: .. outside the loop... jmp LBB1_2 #bb13.outer LBB1_1: #bb1 movsd 8(%esp,%esi,8), %xmm1 mulsd (%edi), %xmm1 addsd %xmm0, %xmm1 addl $24, %edi incl %esi jmp LBB1_3 #bb13 LBB1_2: #bb13.outer leal (%edx,%eax,8), %edi pxor %xmm1, %xmm1 xorl %esi, %esi LBB1_3: #bb13 movapd %xmm1, %xmm0 cmpl $4, %esi jl LBB1_1 #bb1 Note that the loop body is actually LBB1_1 + LBB1_3, which means that the loop now contains an uncond branch WITHIN it to jump around the inserted loop header (LBB1_2). Doh. This patch changes the preheader insertion code to insert it in the right spot, producing this code: ... outside the loop, fall into the header ... LBB1_1: #bb13.outer leal (%edx,%eax,8), %esi pxor %xmm0, %xmm0 xorl %edi, %edi jmp LBB1_3 #bb13 LBB1_2: #bb1 movsd 8(%esp,%edi,8), %xmm0 mulsd (%esi), %xmm0 addsd %xmm1, %xmm0 addl $24, %esi incl %edi LBB1_3: #bb13 movapd %xmm0, %xmm1 cmpl $4, %edi jl LBB1_2 #bb1 Totally crazy, no branch in the loop! :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30587 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-23Teach UpdateDomInfoForRevectoredPreds to handle revectored preds that are notChris Lattner
reachable, making it general purpose enough for use by InsertPreheaderForLoop. Eliminate custom dominfo updating code in InsertPreheaderForLoop, using UpdateDomInfoForRevectoredPreds instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30586 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-23remove misleading commentChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30585 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-23add method, correct commentChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30584 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-22Delete dead code; fix 80 col violations.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30583 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-22add a noteRafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30581 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-22Use "%llvmgxx" instead of "llvm-g++".Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30580 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-22Testcase for better rotate left and mask supportNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30579 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-22Regression testcase for PR855.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30578 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-22Fold AND and ROTL more oftenNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30577 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-22remove extra white spaces.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30576 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-22Use iterative algorith to assign DFS number. This reducesDevang Patel
call stack depth. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30575 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21don't allow 'imm' or specific imms, like '1' on the LHS of a binop.Chris Lattner
This shrinks X86GenDAGISel by ~330 lines. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30574 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21Make it work for DAG combine of multi-value nodes.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30573 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21Fit to 80 columns.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30572 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21core correctionsJim Laskey
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30570 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21Use abstract class to facilitate dlopen() interface.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30569 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21Basic "in frame" alias analysis.Jim Laskey
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30568 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21more condition codesRafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30567 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21if a constant can't be an immediate, add it to the constant poolRafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30566 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21fold (aext (and (trunc x), cst)) -> (and x, cst).Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30561 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21Check the right value type. This fixes 186.crafty on x86Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30560 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21implementedChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30559 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21Compile:Chris Lattner
int %test(ulong *%tmp) { %tmp = load ulong* %tmp ; <ulong> [#uses=1] %tmp.mask = shr ulong %tmp, ubyte 50 ; <ulong> [#uses=1] %tmp.mask = cast ulong %tmp.mask to ubyte %tmp2 = and ubyte %tmp.mask, 3 ; <ubyte> [#uses=1] %tmp2 = cast ubyte %tmp2 to int ; <int> [#uses=1] ret int %tmp2 } to: _test: movl 4(%esp), %eax movl 4(%eax), %eax shrl $18, %eax andl $3, %eax ret instead of: _test: movl 4(%esp), %eax movl 4(%eax), %eax shrl $18, %eax # TRUNCATE movb %al, %al andb $3, %al movzbl %al, %eax ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30558 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21Generalize (zext (truncate x)) and (sext (truncate x)) folding to work whenChris Lattner
the src/dst are not the same size. This catches things like "truncate 32-bit X to 8 bits, then zext to 16", which happens a bit on X86. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30557 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21Fit in 80-colsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30556 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21Fix Transforms/IndVarsSimplify/2006-09-20-LFTR-Crash.llChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30555 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21new testcaseChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30554 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21Fix compile error.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30553 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-21Don't rewrite ConstantExpr::get.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30552 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20Once we're down to "setcc type constant1, constant2", at least come upNick Lewycky
with the right answer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30550 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20Adding codegeneration for StdCall & FastCall calling conventionsAnton Korobeynikov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30549 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20Account for pseudo-ops correctlyAndrew Lenharth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30548 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20The DarwinAsmPrinter need not check for isDarwin. createPPCAsmPrinterPassChris Lattner
should create the right asmprinter subclass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30542 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20Wrap some darwin'isms with isDarwin checks.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30541 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20Use a total ordering to compare instructions.Nick Lewycky
Fixes infinite loop in resolve(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30540 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20simplifyAndrew Lenharth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30535 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20catch constants more oftenAndrew Lenharth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30534 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20catch another constantAndrew Lenharth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30533 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20clarify with test caseAndrew Lenharth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30531 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20Add NoteAndrew Lenharth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30530 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20Trim the home directory from the dejagnu testJim Laskey
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30519 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20item doneChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30518 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20Compile:Chris Lattner
int test3(int a, int b) { return (a < 0) ? a : 0; } to: _test3: srawi r2, r3, 31 and r3, r2, r3 blr instead of: _test3: cmpwi cr0, r3, 1 li r2, 0 blt cr0, LBB2_2 ;entry LBB2_1: ;entry mr r3, r2 LBB2_2: ;entry blr This implements: PowerPC/select_lt0.ll:seli32_a_a git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30517 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20new testcaseChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30516 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20add a noteChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30515 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20Fold the full generality of (any_extend (truncate x))Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30514 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20Two things:Chris Lattner
1. teach SimplifySetCC that '(srl (ctlz x), 5) == 0' is really x != 0. 2. Teach visitSELECT_CC to use SimplifySetCC instead of calling it and ignoring the result. This allows us to compile: bool %test(ulong %x) { %tmp = setlt ulong %x, 4294967296 ret bool %tmp } to: _test: cntlzw r2, r3 cmplwi cr0, r3, 1 srwi r2, r2, 5 li r3, 0 beq cr0, LBB1_2 ; LBB1_1: ; mr r3, r2 LBB1_2: ; blr instead of: _test: addi r2, r3, -1 cntlzw r2, r2 cntlzw r3, r3 srwi r2, r2, 5 cmplwi cr0, r2, 0 srwi r2, r3, 5 li r3, 0 bne cr0, LBB1_2 ; LBB1_1: ; mr r3, r2 LBB1_2: ; blr This isn't wonderful, but it's an improvement. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30513 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20This is already doneChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30512 91177308-0d34-0410-b5e6-96231b3b80d8
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