llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-10-11 07:24:06 +00:00

History

Chris Lattner 05f18920e1 Teach inst combine to merge GEPs through PHIs. This is really important because it is sinking the loads using the GEPs, but not the GEPs themselves. This triggers 647 times on 403.gcc and makes the .s file much much nicer. For example before: je LBB1_87 ## bb78 LBB1_62: ## bb77 leal 84(%esi), %eax LBB1_63: ## bb79 movl (%eax), %eax ... LBB1_87: ## bb78 movl $0, 4(%esp) movl %esi, (%esp) call L_make_decl_rtl$stub jmp LBB1_62 ## bb77 after: jne LBB1_63 ## bb79 LBB1_62: ## bb78 movl $0, 4(%esp) movl %esi, (%esp) call L_make_decl_rtl$stub LBB1_63: ## bb79 movl 84(%esi), %eax The input code was (and the GEPs are merged and the PHI is now eliminated by instcombine): br i1 %tmp233, label %bb78, label %bb77 bb77: %tmp234 = getelementptr %struct.tree_node* %t_addr.3, i32 0, i32 0, i32 22 br label %bb79 bb78: call void @make_decl_rtl(%struct.tree_node* %t_addr.3, i8* null) nounwind %tmp235 = getelementptr %struct.tree_node* %t_addr.3, i32 0, i32 0, i32 22 br label %bb79 bb79: %iftmp.12.0.in = phi %struct.rtx_def [ %tmp235, %bb78 ], [ %tmp234, %bb77 ] %iftmp.12.0 = load %struct.rtx_def %iftmp.12.0.in git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60322 91177308-0d34-0410-b5e6-96231b3b80d8		2008-12-01 02:34:36 +00:00
..
2002-03-11-InstCombineHang.ll
2002-05-14-SubFailure.ll
2002-05-14-TouchDeletedInst.ll
2002-08-02-CastTest.ll
2002-09-17-GetElementPtrCrash.ll
2002-12-05-MissedConstProp.ll
2003-05-26-CastMiscompile.ll
2003-05-27-ConstExprCrash.ll
2003-06-05-BranchInvertInfLoop.ll
2003-06-22-ConstantExprCrash.ll
2003-07-21-ExternalConstant.ll
2003-08-12-AllocaNonNull.ll
2003-09-09-VolatileLoadElim.ll
2003-10-23-InstcombineNullFail.ll
2003-10-29-CallSiteResolve.ll
2003-11-03-VarargsCallBug.ll
2003-11-13-ConstExprCastCall.ll
2004-01-13-InstCombineInvokePHI.ll
2004-02-23-ShiftShiftOverflow.ll
2004-03-13-InstCombineInfLoop.ll
2004-04-04-InstCombineReplaceAllUsesWith.ll
2004-05-07-UnsizedCastLoad.ll
2004-07-27-ConstantExprMul.ll
2004-08-09-RemInfLoop.ll
2004-08-10-BoolSetCC.ll
2004-09-20-BadLoadCombine2.ll
2004-09-20-BadLoadCombine.ll
2004-09-28-BadShiftAndSetCC.ll
2004-11-22-Missed-and-fold.ll
2004-11-27-SetCCForCastLargerAndConstant.ll
2004-12-08-InstCombineCrash.ll
2004-12-08-RemInfiniteLoop.ll
2005-03-04-ShiftOverflow.ll
2005-04-07-UDivSelectCrash.ll
2005-06-15-DivSelectCrash.ll
2005-06-15-ShiftSetCCCrash.ll
2005-06-16-RangeCrash.ll
2005-06-16-SetCCOrSetCCMiscompile.ll
2005-07-07-DeadPHILoop.ll
2006-02-07-SextZextCrash.ll
2006-02-13-DemandedMiscompile.ll
2006-02-28-Crash.ll
2006-03-30-ExtractElement.ll
2006-04-01-InfLoop.ll
2006-04-28-ShiftShiftLongLong.ll
2006-05-04-DemandedBitCrash.ll
2006-05-06-Infloop.ll
2006-06-28-infloop.ll
2006-09-11-EmptyStructCrash.ll
2006-09-15-CastToBool.ll
2006-10-19-SignedToUnsignedCastAndConst-2.ll
2006-10-19-SignedToUnsignedCastAndConst.ll
2006-10-20-mask.ll
2006-10-26-VectorReassoc.ll
2006-11-03-Memmove64.ll
2006-11-10-ashr-miscompile.ll
2006-11-27-XorBug.ll
2006-12-01-BadFPVectorXform.ll
2006-12-05-fp-to-int-ext.ll
2006-12-08-ICmp-Combining.ll
2006-12-08-Phi-ICmp-Op-Fold.ll
2006-12-08-Select-ICmp.ll
2006-12-10-ICmp-GEP-GEP.ll
2006-12-15-Range-Test.ll
2006-12-23-Select-Cmp-Cmp.ll
2007-01-13-ExtCompareMiscompile.ll
2007-01-14-FcmpSelf.ll
2007-01-18-VectorInfLoop.ll
2007-01-27-AndICmp.ll
2007-02-01-LoadSinkAlloca.ll
2007-02-07-PointerCast.ll
2007-02-23-PhiFoldInfLoop.ll
2007-03-13-CompareMerge.ll
2007-03-19-BadTruncChangePR1261.ll
2007-03-21-SignedRangeTest.ll
2007-03-25-BadShiftMask.ll
2007-03-25-DoubleShift.ll
2007-03-26-BadShiftMask.ll
2007-03-27-PR1280.ll
2007-03-31-InfiniteLoop.ll
2007-04-04-BadFoldBitcastIntoMalloc.ll
2007-04-08-SingleEltVectorCrash.ll
2007-05-04-Crash.ll
2007-05-10-icmp-or.ll
2007-05-14-Crash.ll
2007-05-18-CastFoldBug.ll
2007-06-06-AshrSignBit.ll
2007-06-21-DivCompareMiscomp.ll
2007-08-02-InfiniteLoop.ll
2007-09-05-EqualGEP.ll
2007-09-10-AliasConstFold.ll
2007-09-11-Trampoline.ll
2007-09-17-AliasConstFold2.ll
2007-10-10-EliminateMemCpy.ll
2007-10-12-Crash.ll
2007-10-28-EmptyField.ll
2007-10-28-stacksave.ll
2007-10-31-RangeCrash.ll
2007-10-31-StringCrash.ll
2007-11-07-OpaqueAlignCrash.ll
2007-11-15-CompareMiscomp.ll
2007-11-22-IcmpCrash.ll
2007-11-25-CompatibleAttributes.ll
2007-12-10-ConstFoldCompare.ll
2007-12-12-GEPScale.ll
2007-12-16-AsmNoUnwind.ll
2007-12-18-AddSelCmpSub.ll
2007-12-28-IcmpSub2.ll
2008-01-06-BitCastAttributes.ll
2008-01-06-CastCrash.ll
2008-01-06-VoidCast.ll
2008-01-13-AndCmpCmp.ll
2008-01-13-NoBitCastAttributes.ll
2008-01-14-DoubleNest.ll
2008-01-14-VarArgTrampoline.ll
2008-01-21-MismatchedCastAndCompare.ll
2008-01-21-MulTrunc.ll
2008-01-27-FloatSelect.ll
2008-01-29-AddICmp.ll
2008-02-04-GEPIdxBug.ll
2008-02-13-MulURem.ll
2008-02-16-SDivOverflow2.ll
2008-02-16-SDivOverflow.ll
2008-02-23-MulSub.ll
2008-02-28-OrFCmpCrash.ll
2008-03-13-IntToPtr.ll
2008-04-22-ByValBitcast.ll
2008-04-28-VolatileStore.ll
2008-04-29-VolatileLoadDontMerge.ll
2008-04-29-VolatileLoadMerge.ll
2008-05-08-LiveStoreDelete.ll
2008-05-08-StrLenSink.ll
2008-05-09-SinkOfInvoke.ll
2008-05-17-InfLoop.ll
2008-05-18-FoldIntToPtr.ll
2008-05-22-IDivVector.ll
2008-05-22-NegValVector.ll
2008-05-23-CompareFold.ll
2008-05-31-AddBool.ll
2008-05-31-Bools.ll
2008-06-05-ashr-crash.ll
2008-06-08-ICmpPHI.ll
2008-06-13-InfiniteLoopStore.ll
2008-06-13-ReadOnlyCallStore.ll
2008-06-19-UncondLoad.ll
2008-06-21-CompareMiscomp.ll
2008-06-24-StackRestore.ll
2008-07-08-AndICmp.ll
2008-07-08-ShiftOneAndOne.ll
2008-07-08-SubAnd.ll
2008-07-08-VolatileLoadMerge.ll
2008-07-09-SubAndError.ll
2008-07-10-CastSextBool.ll
2008-07-10-ICmpBinOp.ll
2008-07-11-RemAnd.ll
2008-07-13-DivZero.ll
2008-07-16-fsub.ll
2008-07-16-sse2_storel_dq.ll
2008-08-05-And.ll
2008-08-17-ICmpXorSignbit.ll
2008-09-02-VectorCrash.ll	Don't crash when trying to constant fold a vector with some elements that can't	2008-09-03 05:54:33 +00:00
2008-09-29-FoldingOr.ll	Fix misoptimization of: xor i1 (icmp eq (X, C1), icmp s[lg]t (X, C2))	2008-09-30 06:08:34 +00:00
2008-10-11-DivCompareFold.ll	Fix PR2697 by rewriting the '(X / pos) op neg' logic. This also changes	2008-10-11 22:55:00 +00:00
2008-10-23-ConstFoldWithoutMask.ll	Don't try to create a mask when we don't need one. Fixes a crash.	2008-10-24 06:14:27 +00:00
2008-11-01-SRemDemandedBits.ll	Fix demanded bits analysis with srem by negative number. Based on a patch	2008-11-02 02:41:50 +00:00
2008-11-08-FCmp.ll	If the LHS of the FCMP is coming from a UIToFP instruction, then we don't want	2008-11-09 04:26:50 +00:00
2008-11-20-DivMulRem.ll	Optimize (x/y)*y into x-(x%y) in general. Div and rem are about the same, and	2008-11-21 07:33:58 +00:00
2008-11-27-IDivVector.ll	Add a couple of missed optimizations on integer vectors. Multiply and divide	2008-11-27 20:21:08 +00:00
2008-11-27-MultiplyIntVec.ll	Add a couple of missed optimizations on integer vectors. Multiply and divide	2008-11-27 20:21:08 +00:00
2008-11-27-UDivNegative.ll	Chris prefers icmp/select over udiv!	2008-11-27 22:41:10 +00:00
add2.ll
add-shrink.ll
add-sitofp.ll
add.ll
addnegneg.ll
adjust-for-sminmax.ll	Improve instcombine's handling of integer min and max in two ways:	2008-09-16 18:46:06 +00:00
align-2d-gep.ll
align-addr.ll
align-inc.ll
alloca.ll
and2.ll
and-compare.ll
and-fcmp.ll	- Somehow I forgot about one / une.	2008-10-14 18:13:38 +00:00
and-not-or.ll	Implement (A&((~A)\|B)) -> A&B transformation in the instruction combiner. This	2008-11-30 13:08:13 +00:00
and-or-and.ll
and-or-not.ll
and-or.ll	Implement ((A\|B)&1)\|(B&-2) -> (A&1) \| B transformation. This also takes care of	2008-12-01 01:07:11 +00:00
and-xor-merge.ll
and.ll
apint-add1.ll
apint-add2.ll
apint-and1.ll
apint-and2.ll
apint-and-compare.ll
apint-and-or-and.ll
apint-and-xor-merge.ll
apint-call-cast-target.ll
apint-cast-and-cast.ll
apint-cast-cast-to-and.ll
apint-cast.ll
apint-div1.ll
apint-div2.ll
apint-elim-logicalops.ll
apint-mul1.ll
apint-mul2.ll
apint-not.ll
apint-or1.ll
apint-or2.ll
apint-rem1.ll
apint-rem2.ll
apint-select.ll
apint-shift-simplify.ll
apint-shift.ll
apint-shl-trunc.ll
apint-sub.ll	Instcombine was illegally transforming -X/C into X/-C when either X or C	2008-11-30 03:42:12 +00:00
apint-xor1.ll
apint-xor2.ll
apint-zext1.ll
apint-zext2.ll
binop-cast.ll
bit-tracking.ll
bitcast-gep.ll
bitcast-vector-fold.ll
bitcount.ll
bittest.ll
bswap-fold.ll
bswap.ll	rewrite bswap matching to be more general, allowing arbitrary	2008-10-05 02:13:19 +00:00
call2.ll
call-cast-target.ll
call-intrinsics.ll
call.ll
canonicalize_branch.ll
cast2.ll
cast_ptr.ll
cast-and-cast.ll
cast-cast-to-and.ll
cast-load-gep.ll
cast-malloc.ll
cast-mul-select.ll
cast-propagate.ll
cast-set.ll
cast.ll
CPP_min_max.ll
deadcode.ll
dg.exp
div-cmp-overflow.ll	Fix an icmp+sdiv optimization to check for and handle an overflow	2008-09-10 23:30:57 +00:00
div.ll
extractvalue.ll
fold-vector-zero.ll
fp-ret-bitcast.ll
fpcast.ll
fpextend.ll
GEPIdxCanon.ll
getelementptr_cast.ll
getelementptr_const.ll
getelementptr_index.ll
getelementptr_promote.ll	On 64-bit targets, change 32-bit getelementptr indices to be 64-bit	2008-09-11 23:06:38 +00:00
getelementptr-setcc.ll
getelementptr-seteq.ll
getelementptr.ll
hoist_instr.ll
icmp.ll
IntPtrCast.ll
JavaCompare.ll
known_align.ll
load2.ll
load3.ll	Teach instcombine's visitLoad to scan back several instructions	2008-10-15 23:19:35 +00:00
load.ll	Teach instcombine's visitLoad to scan back several instructions	2008-10-15 23:19:35 +00:00
loadstore-alignment.ll
logical-select.ll	Handle the case where there is no "not". It is possible it got	2008-11-16 04:25:26 +00:00
malloc2.ll
malloc3.ll
malloc-free-delete.ll
malloc.ll
memcpy-to-load.ll
memmove.ll
memset.ll
mul-masked-bits.ll
mul.ll
narrow.ll
not-fcmp.ll
not.ll
or2.ll
or-fcmp.ll	Combine (fcmp cc0 x, y) \| (fcmp cc1 x, y) into a single fcmp when possible.	2008-10-14 18:44:08 +00:00
or-to-xor.ll	Add instruction combining for ((A&~B)\|(~A&B)) -> A^B and all permutations.	2008-11-30 13:52:49 +00:00
or.ll
phi-merge.ll
phi.ll	Teach inst combine to merge GEPs through PHIs. This is really	2008-12-01 02:34:36 +00:00
pr2645-0.ll	Fix a vectorshuffle instcombine bug introduced by r55995.	2008-09-11 22:47:57 +00:00
pr2645-1.ll	Fix a vectorshuffle instcombine bug introduced by r55995.	2008-09-11 22:47:57 +00:00
pr2996.ll	Fix this recently moved code to use the correct type. CI is now a	2008-11-02 00:17:33 +00:00
preserve-sminmax.ll	Improve instcombine's handling of integer min and max in two ways:	2008-09-16 18:46:06 +00:00
README.txt
rem.ll
sdiv-1.ll	Strengthen check for div inst-combining.	2008-11-30 04:33:53 +00:00
sdiv-2.ll	getSExtValue() doesn't work for ConstantInts with bitwidth > 64 bits. Use all	2008-11-30 12:38:24 +00:00
select.ll
set.ll
setcc-cast-cast.ll
setcc-strength-reduce.ll
sext-misc.ll
shift-simplify.ll
shift-sra.ll
shift-trunc-shift.ll
shift.ll
shl-icmp.ll
shl-trunc.ll
shufflemask-undef.ll
signext.ll
sink_instruction.ll
sitofp.ll
srem1.ll
srem-simplify-bug.ll
srem.ll
stacksaverestore.ll
store-merge.ll
store.ll
sub.ll	Instcombine was illegally transforming -X/C into X/-C when either X or C	2008-11-30 03:42:12 +00:00
udiv_select_to_select_shift.ll
udiv-simplify-bug-0.ll
udiv-simplify-bug-1.ll	Chris prefers icmp/select over udiv!	2008-11-27 22:41:10 +00:00
urem-simplify-bug.ll
urem.ll
vec_demanded_elts.ll
vec_extract_elt.ll
vec_insert_to_shuffle.ll
vec_insertelt.ll
vec_narrow.ll
vec_shuffle.ll
vector-srem.ll
volatile_store.ll
xor2.ll
xor-undef.ll
xor.ll
zero-point-zero-add.ll
zeroext-and-reduce.ll
zext-fold.ll
zext-or-icmp.ll
zext.ll

README.txt

This directory contains test cases for the instcombine transformation.  The
dated tests are actual bug tests, whereas the named tests are used to test
for features that the this pass should be capable of performing.