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2008-12-18Fix indentation level.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61216 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18When emitting instructions that define EFLAGS and the EFLAGS value isn'tDan Gohman
used, mark the defs as dead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61215 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18When setting up the frame pointer, add it as a live-in register to allDan Gohman
non-entry blocks, so that it doesn't appear use-before-def anywhere. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61214 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Print subreg information in MachineInstr::dump.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61213 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Fixed x86 code generation of multiple for v2i64. It was incorrect for SSE4.1.Mon P Wang
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61211 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Added support for vector widening.Mon P Wang
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61209 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Remove dead comments.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61201 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Oops! Left out a line.Nick Lewycky
Simplifying the sdiv might allow further simplifications for our users. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61196 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Make all the vector elements positive in an srem of constant vector.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61195 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Fix PR2929 by making bugpoint/code extract propagate the nothrowChris Lattner
bit from the original function to the cloned one. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61194 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Give MachineLICM a name, for -time-passes etc.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61184 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Move post-RA scheduling before branch folding for now, because branchDan Gohman
folding's tail merging doesn't currently preserve liveness information which post-RA scheduling requires. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61183 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Re-apply r61158 in a form that no longer breaks tests.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61182 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Revert previous patch, appears to break bootstrap.Dale Johannesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61181 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Mark the x86 fp stack registers as "reserved". This tells LiveVariablesDan Gohman
and the RegisterScavenger not to expect traditional liveness techniques are applicable to these registers, since we don't fully modify the effects of push and pop after stackification. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61179 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18Fix the time regression I introduced in 464.h264ref withDale Johannesen
my last patch to this file. The issue there was that all uses of an IV inside a loop are actually references to Base[IV*2], and there was one use outside that was the same but LSR didn't see the base or the scaling because it didn't recurse into uses outside the loop; thus, it used base+IV*scale mode inside the loop instead of pulling base out of the loop. This was extra bad because register pressure later forced both base and IV into memory. Doing that recursion, at least enough to figure out addressing modes, is a good idea in general; the change in AddUsersIfInteresting does this. However, there were side effects.... It is also possible for recursing outside the loop to introduce another IV where there was only 1 before (if the refs inside are not scaled and the ref outside is). I don't think this is a common case, but it's in the testsuite. It is right to be very aggressive about getting rid of such introduced IVs (CheckForIVReuse and the handling of nonzero RewriteFactor in StrengthReduceStridedIVUsers). In the testcase in question the new IV produced this way has both a nonconstant stride and a nonzero base, neither of which was handled before. (This patch does not handle all the cases where this can happen.) And when inserting new code that feeds into a PHI, it's right to put such code at the original location rather than in the PHI's immediate predecessor(s) when the original location is outside the loop (a case that couldn't happen before) (RewriteInstructionToUseNewBase); better to avoid making multiple copies of it in this case. Everything above is exercised in CodeGen/X86/lsr-negative-stride.ll (and ifcvt4 in ARM which is the same IR). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61178 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18reapply this hunk from Bill's reversion in r61169, it is conservativeChris Lattner
and safe and orthogonal from turning off load pre. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61177 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-18make instnamer name unnamed blocks as well as instructions and args.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61175 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17Temporarily revert r61027. It was causing a bootstrap failure in "release" modeBill Wendling
with everyone's favorite error messages: Comparing stages 2 and 3 warning: ./cc1-checksum.o differs warning: ./cc1plus-checksum.o differs Bootstrap comparison failure! ./c-decl.o differs ./cp/decl.o differs ./df-core.o differs ./gcc.o differs ./i386.o differs ./stor-layout.o differs ./tree-pretty-print.o differs ./tree.o differs make[2]: *** [compare] Error 1 make[1]: *** [stage3-bubble] Error 2 See PR3227. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61169 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17Today the front-ends (llvm-gcc and clang) generate multiple ↵Devang Patel
llvm.dbg.compile_units to identify source file for various debug entities. Each llvm.dbg.compile_unit matches one file on the disk. However, the backend only supports one DW_TAG_compile_unit per .o file. The backend selects first compile_unit from the vector to construct DW_TAG_compile_unit entry, which is not correct in all cases. First step to resolve this is, record file name and directory directly in debug info for various debug entities. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61164 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17Revert r61158 for now, as it caused some test failures.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61159 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17Fix miscompilations caused by renumbering, and enable it as part of prealloc ↵Owen Anderson
splitting. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61158 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17This adds some missing functions to the C binding:Chris Lattner
- ability to insert previously created instructions using a builder - creation of aliases - creation of inline asm constants Patch by Zoltan Varga! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61153 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17Forgot to revert r61031 when I reverted r61019, r61030, and r61040.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61150 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17Fix expansion of vsetcc to set the high bit for true instead of 1.Mon P Wang
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61129 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17insert some sequence points and preincrement an iterator to avoidChris Lattner
iterator invalidation problems. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61124 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17Enhance heap sra to be substantially more aggressive w.r.t PHIChris Lattner
nodes. This allows it to do fairly general phi insertion if a load from a pointer global wants to be SRAd but the load is used by (recursive) phi nodes. This fixes a pessimization on ppc introduced by Load PRE. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61123 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17Double the amount of memory reserved for SUnits. This is aDan Gohman
temporary workaround for an obscure bug. When node cloning is used, it is possible that more SUnits will be created, and if the SUnits std::vector has to reallocate, it will invalidate all the graph edges. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61122 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17Use getDepth() and getHeight() instead of accessing theDan Gohman
Depth and Height members directly, as they may not be current. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61121 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17Fix for PR3225: disable a broken optimization inEli Friedman
DAGTypeLegalizer::ExpandShiftWithKnownAmountBit. In terms of restoring the optimization, the best fix here isn't obvious... any ideas? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61119 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Clarify that the scale factor from CheckForIVReuseDale Johannesen
can be negative. Keep track of whether all uses of an IV are outside the loop. Some cosmetics; no functional change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61109 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16A new dag combine; several permutations of thisDale Johannesen
are there under ADD, this one was missing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61107 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Add code to renumber split intervals into new vregs. This is disabled for ↵Owen Anderson
now until I finish working out some iterator invalidation issues. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61104 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Fix another crash found by inspection. If we have a PHI node mergingChris Lattner
the load multiple times, make sure the check the uses of the PHI to ensure they are transformable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61102 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16fix a crash found by inspection.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61101 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Add a helper to remove a branch and DCE the condition, and use it Eli Friedman
consistently for deleting branches. In addition to being slightly more readable, this makes SimplifyCFG a bit better about cleaning up after itself when it makes conditions unused. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61100 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Eliminate the loop that walks the critical path. Instead, just track theDan Gohman
position in the critical path during the main instruction walk. This eliminates the need for the CritialAntiDep DenseMap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61096 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Temporarily revert r61019, r61030, and r61040. These were breaking LLVM ReleaseBill Wendling
builds. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61094 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Preserve SourceValue information when lowering produces multiple loads fromDan Gohman
different offsets within the same stack slot. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61093 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16We have decided not to support inline asm where an output operand with a ↵Evan Cheng
matching input operand with incompatible type (i.e. either one is a floating point and the other is an integer or the sizes of the types differ). SelectionDAGBuild will catch these and exit with an error. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61092 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16CMake: Added DbgInfoPrinter.cpp to lib/Analysis/CMakeFiles.txt.Oscar Fuentes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61087 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Add -print-dbginfo pass that prints LLVM IR with comments inserted to showTorok Edwin
which source/line a certain BB/instruction comes from, original variable names, and original (unmangled) C++ name of functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61085 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Add utility functions to search for DbgStopPointInst corresponding to anTorok Edwin
instruction or BasicBlock, and to search for DbgDeclareInst corresponding to a variable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61084 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16use different name for parameter to make it clear that we set DIDescriptor::GVTorok Edwin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61083 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Generalize support for analyzing loops to include SLE/SGE loop exit conditionsNick Lewycky
and support for non-unit strides with signed exit conditions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61082 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16switch some std::set/std::map to SmallPtrSet/DenseMap.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61081 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16fix PR3217: fully cached queries need to be verified against the Chris Lattner
visited set before they are used. If used, their blocks need to be added to the visited set so that subsequent queries don't use conflicting pointer values in the cache result blocks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61080 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Enable anti-dependence breaking by default when post-RA scheduling is enabled.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61078 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16When breaking an anti-dependency, don't use a register which has seenDan Gohman
one of its aliases defined. This is conservative, but tricky subreg corner cases are outside the primary aim of this pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61077 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Add initial support for back-scheduling address computations,Dan Gohman
especially in the case of addresses computed from loop induction variables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61075 91177308-0d34-0410-b5e6-96231b3b80d8
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