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2008-11-27delete ErasePossiblyDeadInstructionTree, replacing uses of it withChris Lattner
RecursivelyDeleteTriviallyDeadInstructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60196 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27Simplify LoopStrengthReduce::DeleteTriviallyDeadInstructions byChris Lattner
making it use RecursivelyDeleteTriviallyDeadInstructions to do the heavy lifting. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60195 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27enhance RecursivelyDeleteTriviallyDeadInstructions to makeChris Lattner
PHIs dead if they are single-value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60194 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27Enhance RecursivelyDeleteTriviallyDeadInstructions to optionallyChris Lattner
return a list of deleted instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60193 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27use continue to reduce indentationChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60192 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27remove doConstantPropagation and dceInstruction, they are justChris Lattner
wrappers around the interesting code and use an obscure iterator abstraction that dates back many many years. Move EraseDeadInstructions to Transforms/Utils and name it RecursivelyDeleteTriviallyDeadInstructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60191 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27simplify code.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60190 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27simplify this logic.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60189 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27Chris prefers icmp/select over udiv!Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60187 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27Add a couple of missed optimizations on integer vectors. Multiply and divideNick Lewycky
by 1, as well as multiply by -1. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60182 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27defensive patch: if CGP is merging a block with the entry block, make sureChris Lattner
it ends up being the entry block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60180 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27Fix PR3138: if we merge the entry block into another block, make sure toChris Lattner
move the other block back up into the entry position! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60179 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27switch InstCombine::visitLoadInst to use Chris Lattner
FindAvailableLoadedValue git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60169 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27enhance FindAvailableLoadedValue to make use of AliasAnalysisChris Lattner
if it has it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60167 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27move FindAvailableLoadedValue from JumpThreading to Transforms/Utils.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60166 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27simplify this code a bit.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60164 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27Use the new MergeBasicBlockIntoOnlyPred function.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60163 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27move MergeBasicBlockIntoOnlyPred to Transforms/Utils.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60162 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27rename ThreadBlock to ProcessBlock, since it does other things thanChris Lattner
just simple threading. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60157 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27Make jump threading substantially more powerful, in the following ways:Chris Lattner
1. Make it fold blocks separated by an unconditional branch. This enables jump threading to see a broader scope. 2. Make jump threading able to eliminate locally redundant loads when they feed the branch condition of a block. This frequently occurs due to reg2mem running. 3. Make jump threading able to eliminate *partially redundant* loads when they feed the branch condition of a block. This is common in code with lots of loads and stores like C++ code and 255.vortex. This implements thread-loads.ll and rdar://6402033. Per the fixme's, several pieces of this should be moved into Transforms/Utils. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60148 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26Turn on my codegen prepare heuristic by default. It doesn't affect Chris Lattner
performance in most cases on the Grawp tester, but does speed some things up (like shootout/hash by 15%). This also doesn't impact compile time in a noticable way on the Grawp tester. It also, of course, gets the testcase it was designed for right :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60120 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26teach the new heuristic how to handle inline asm.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60088 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26Improve ValueAlreadyLiveAtInst with a cheap and dirty, but effectiveChris Lattner
heuristic: the value is already live at the new memory operation if it is used by some other instruction in the memop's block. This is cheap and simple to compute (moreso than full liveness). This improves the new heuristic even more. For example, it cuts two out of three new instructions out of 255.vortex:DbmFileInGrpHdr, which is one of the functions that the heuristic regressed. This overall eliminates another 40 instructions from 403.gcc and visibly reduces register pressure in 255.vortex (though this only actually ends up saving the 2 instructions from the whole program). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60084 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26Start rewroking a subpiece of the profitability heuristic to beChris Lattner
phrased in terms of liveness instead of as a horrible hack. :) In pratice, this doesn't change the generated code for either 255.vortex or 403.gcc, but it could cause minor code changes in theory. This is framework for coming changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60082 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26add a comment, make save/restore logic more obvious.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60076 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26This adds in some code (currently disabled unless you pass Chris Lattner
-enable-smarter-addr-folding to llc) that gives CGP a better cost model for when to sink computations into addressing modes. The basic observation is that sinking increases register pressure when part of the addr computation has to be available for other reasons, such as having a use that is a non-memory operation. In cases where it works, it can substantially reduce register pressure. This code is currently an overall win on 403.gcc and 255.vortex (the two things I've been looking at), but there are several things I want to do before enabling it by default: 1. This isn't doing any caching of results, so it is much slower than it could be. It currently slows down release-asserts llc by 1.7% on 176.gcc: 27.12s -> 27.60s. 2. This doesn't think about inline asm memory operands yet. 3. The cost model botches the case when the needed value is live across the computation for other reasons. I'll continue poking at this, and eventually turn it on as llcbeta. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60074 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26Revert r60042. IndVarSimplify should check if APFloat is PPCDoubleDouble ↵Evan Cheng
first before trying to convert it to an integer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60072 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26Teach CodeGenPrepare to look through Bitcast instructions when attempting toChris Lattner
optimize addressing modes. This allows us to optimize things like isel-sink2.ll into: movl 4(%esp), %eax cmpb $0, 4(%eax) jne LBB1_2 ## F LBB1_1: ## TB movl $4, %eax ret LBB1_2: ## F movzbl 7(%eax), %eax ret instead of: _test: movl 4(%esp), %eax cmpb $0, 4(%eax) leal 4(%eax), %eax jne LBB1_2 ## F LBB1_1: ## TB movl $4, %eax ret LBB1_2: ## F movzbl 3(%eax), %eax ret This shrinks (e.g.) 403.gcc from 1133510 to 1128345 lines of .s. Note that the 2008-10-16-SpillerBug.ll testcase is dubious at best, I doubt it is really testing what it thinks it is. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60068 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25Teach MatchScaledValue to handle Scales by 1 with MatchAddr (whichChris Lattner
can recursively match things) and scales by 0 by ignoring them. This triggers once in 403.gcc, saving 1 (!!!!) instruction in the whole huge app. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60013 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25significantly refactor all the addressing mode matching logicChris Lattner
into a new AddressingModeMatcher class. This makes it easier to reason about and reduces passing around of stuff, but has no functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60012 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25refactor all the constantexpr/instruction handling code out into a Chris Lattner
new FindMaximalLegalAddressingModeForOperation helper method. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60011 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25another minor tweakChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60010 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-25minor cleanups no functionality change.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60009 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-24rearrange and tidy some code, no functionality change.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59990 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-24minor cleanups to debug code, no functionality change.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59989 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-24reenable the right part of the code.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59985 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-24revert an accidental commit, this fixes the regression on ↵Chris Lattner
test/CodeGen/X86/isel-sink.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59976 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-24Fix 3113: If we have a dead cyclic PHI, replace the whole thingChris Lattner
with an undef. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59972 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21Fix build failure.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59844 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21Silence unused variable warnings.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59841 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21reapply Sanjiv's patch to genericize memcpy/memset/memmove to take anChris Lattner
arbitrary integer width for the count. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59823 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21Revert r59802. It was breaking the build of llvm-gcc:Bill Wendling
g++ -m32 -c -g -DIN_GCC -W -Wall -Wwrite-strings -Wmissing-format-attribute -fno-common -mdynamic-no-pic -DHAVE_CONFIG_H -Wno-unused -DTARGET_NAME=\"i386-apple-darwin9.5.0\" -I. -I. -I../../llvm-gcc.src/gcc -I../../llvm-gcc.src/gcc/. -I../../llvm-gcc.src/gcc/../include -I./../intl -I../../llvm-gcc.src/gcc/../libcpp/include -I../../llvm-gcc.src/gcc/../libdecnumber -I../libdecnumber -I/Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.obj/include -I/Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.src/include -DENABLE_LLVM -I/Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.obj/../llvm.src/include -D_DEBUG -D_GNU_SOURCE -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -I. -I. -I../../llvm-gcc.src/gcc -I../../llvm-gcc.src/gcc/. -I../../llvm-gcc.src/gcc/../include -I./../intl -I../../llvm-gcc.src/gcc/../libcpp/include -I../../llvm-gcc.src/gcc/../libdecnumber -I../libdecnumber -I/Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.obj/include -I/Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.src/include ../../llvm-gcc.src/gcc/llvm-types.cpp -o llvm-types.o ../../llvm-gcc.src/gcc/llvm-convert.cpp: In member function 'void TreeToLLVM::EmitMemCpy(llvm::Value*, llvm::Value*, llvm::Value*, unsigned int)': ../../llvm-gcc.src/gcc/llvm-convert.cpp:1496: error: 'memcpy_i32' is not a member of 'llvm::Intrinsic' ../../llvm-gcc.src/gcc/llvm-convert.cpp:1496: error: 'memcpy_i64' is not a member of 'llvm::Intrinsic' ../../llvm-gcc.src/gcc/llvm-convert.cpp: In member function 'void TreeToLLVM::EmitMemMove(llvm::Value*, llvm::Value*, llvm::Value*, unsigned int)': ../../llvm-gcc.src/gcc/llvm-convert.cpp:1512: error: 'memmove_i32' is not a member of 'llvm::Intrinsic' ../../llvm-gcc.src/gcc/llvm-convert.cpp:1512: error: 'memmove_i64' is not a member of 'llvm::Intrinsic' ../../llvm-gcc.src/gcc/llvm-convert.cpp: In member function 'void TreeToLLVM::EmitMemSet(llvm::Value*, llvm::Value*, llvm::Value*, unsigned int)': ../../llvm-gcc.src/gcc/llvm-convert.cpp:1528: error: 'memset_i32' is not a member of 'llvm::Intrinsic' ../../llvm-gcc.src/gcc/llvm-convert.cpp:1528: error: 'memset_i64' is not a member of 'llvm::Intrinsic' make[3]: *** [llvm-convert.o] Error 1 make[3]: *** Waiting for unfinished jobs.... rm fsf-funding.pod gcov.pod gfdl.pod cpp.pod gpl.pod gcc.pod make[2]: *** [all-stage1-gcc] Error 2 make[1]: *** [stage1-bubble] Error 2 make: *** [all] Error 2 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59809 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21Make mem[cpy,move,set] intrinsics overloaded.Sanjiv Gupta
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59802 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21Optimize (x/y)*y into x-(x%y) in general. Div and rem are about the same, andNick Lewycky
a subtract is cheaper than a multiply. This generalizes an existing transform. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59800 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21Fix unused variable warnings.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59778 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21Fix error where it wasn't getting the correct caller function.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59758 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21If the function being inlined has a higher stack protection level than theBill Wendling
inlining function, then increase the stack protection level on the inlining function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59757 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-20Don't forget arguments!Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59745 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-20Do not forget llvm.dbg.declare's first argument while removing debugging ↵Devang Patel
information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59688 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-19CMake: Removed source file.Oscar Fuentes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59662 91177308-0d34-0410-b5e6-96231b3b80d8
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