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* Minor code simplifications. Don't attempt LSR on theoreticalDan Gohman2009-04-161-12/+6
| | | | | | | | targets with pointers larger than 64 bits, due to the code not yet being APInt clean. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69296 91177308-0d34-0410-b5e6-96231b3b80d8
* LSR is no longer a GEP optimizer. It is now an IV expressionDan Gohman2009-04-161-2/+1
| | | | | | | optimizer, which just happen to frequently involve optimizing GEPs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69295 91177308-0d34-0410-b5e6-96231b3b80d8
* Use ConstantExpr::getIntToPtr instead of SCEVExpander::InsertCastOfTo,Dan Gohman2009-04-161-3/+2
| | | | | | | since the operand is always a constant. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69291 91177308-0d34-0410-b5e6-96231b3b80d8
* Use a SCEV expression cast instead of immediately inserting aDan Gohman2009-04-161-8/+8
| | | | | | | new instruction with SCEVExpander::InsertCastOfTo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69290 91177308-0d34-0410-b5e6-96231b3b80d8
* Expand GEPs in ScalarEvolution expressions. SCEV expressions can nowDan Gohman2009-04-162-309/+103
| | | | | | | | | | | | | | | | | | | | | | have pointer types, though in contrast to C pointer types, SCEV addition is never implicitly scaled. This not only eliminates the need for special code like IndVars' EliminatePointerRecurrence and LSR's own GEP expansion code, it also does a better job because it lets the normal optimizations handle pointer expressions just like integer expressions. Also, since LLVM IR GEPs can't directly index into multi-dimensional VLAs, moving the GEP analysis out of client code and into the SCEV framework makes it easier for clients to handle multi-dimensional VLAs the same way as other arrays. Some existing regression tests show improved optimization. test/CodeGen/ARM/2007-03-13-InstrSched.ll in particular improved to the point where if-conversion started kicking in; I turned it off for this test to preserve the intent of the test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69258 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate zext over (iv | const) or (signed iv),Dale Johannesen2009-04-151-22/+77
| | | | | | | | | | and sext over (iv | const), if a longer iv is available. Allow expressions to have more than one zext/sext parent. All from OpenSSL. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69241 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate zext over (iv & const) or ((iv+const)&const)Dale Johannesen2009-04-151-31/+89
| | | | | | | | | if a longer iv is available. These subscript forms are not common; they're a bottleneck in OpenSSL. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69215 91177308-0d34-0410-b5e6-96231b3b80d8
* Enhance induction variable code to remove theDale Johannesen2009-04-151-40/+121
| | | | | | | | | | | sext around sext(shorter IV + constant), using a longer IV instead, when it can figure out the add can't overflow. This comes up a lot in subscripting; mainly affects 64 bit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69123 91177308-0d34-0410-b5e6-96231b3b80d8
* Avoid making the transformation enabled by my last patch if the new ↵Evan Cheng2009-04-151-3/+13
| | | | | | destinations have phi nodes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69121 91177308-0d34-0410-b5e6-96231b3b80d8
* While inlining, clone llvm.dbg.func.start intrinsic and adjust Devang Patel2009-04-152-3/+52
| | | | | | | llvm.dbg.region.end instrinsic. This nested llvm.dbg.func.start/llvm.dbg.region.end pair now enables DW_TAG_inlined_subroutine support in code generator. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69118 91177308-0d34-0410-b5e6-96231b3b80d8
* Optimize conditional branch on i1 phis with non-constant inputs.Evan Cheng2009-04-141-14/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This turns: eq: %3 = icmp eq i32 %1, %2 br label %join ne: %4 = icmp ne i32 %1, %2 br label %join join: %5 = phi i1 [%3, %eq], [%4, %ne] br i1 %5, label %yes, label %no => eq: %3 = icmp eq i32 %1, %2 br i1 %3, label %yes, label %no ne: %4 = icmp ne i32 %1, %2 br i1 %4, label %yes, label %no git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69102 91177308-0d34-0410-b5e6-96231b3b80d8
* LoopIndexSplit needs to inform the loop pass manager of the instructions it isOwen Anderson2009-04-141-0/+1
| | | | | | | deleting, not just the basic block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69011 91177308-0d34-0410-b5e6-96231b3b80d8
* eliminate unneeded parens.Chris Lattner2009-04-131-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68939 91177308-0d34-0410-b5e6-96231b3b80d8
* "There was a typo in my previous patch which leads to miscompilation ofChris Lattner2009-04-121-1/+1
| | | | | | | | | | | | | | | | strncat :( strncat(foo, "bar", 99) would be optimized to memcpy(foo+strlen(foo), "bar", 100, 1) instead of memcpy(foo+strlen(foo), "bar", 4, 1)" Patch by Benjamin Kramer! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68905 91177308-0d34-0410-b5e6-96231b3b80d8
* add some optimizations for strncpy/strncat and factor someChris Lattner2009-04-121-22/+114
| | | | | | | | code. Patch by Benjamin Kramer! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68885 91177308-0d34-0410-b5e6-96231b3b80d8
* Instcombine should not promote whole computation trees to "strange"Chris Lattner2009-04-081-0/+20
| | | | | | | | | | | | | | | integer types, unless they are already strange. This prevents it from turning the code produced by SROA into crazy libcalls and stuff that the code generator can't handle. In the attached example, the result was an i96 multiply that caused the x86 backend to assert. Note that if TargetData had an idea of what the legal types are for a target that this could be used to stop instcombine from introducing i64 muls, as Scott wanted. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68598 91177308-0d34-0410-b5e6-96231b3b80d8
* fix rdar://6762290, a crash compiling cxx filt with clang.Chris Lattner2009-04-071-3/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68500 91177308-0d34-0410-b5e6-96231b3b80d8
* remove empty sectionChris Lattner2009-04-071-4/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68485 91177308-0d34-0410-b5e6-96231b3b80d8
* Let the strcat optimizer return the pointer to the start of the buffer,Ed Schouten2009-04-061-2/+2
| | | | | | | | | | instead of the place where it started to perform the string copy. - PR3661 - Patch by Benjamin Kramer! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68443 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply r68211, with the miscompilations it caused fixed.Owen Anderson2009-04-011-9/+30
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68262 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r68172. It caused regressions inDan Gohman2009-04-011-38/+10
| | | | | | | | | Applications/Burg/burg Applications/ClamAV/clamscan and many other tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68211 91177308-0d34-0410-b5e6-96231b3b80d8
* Enhance GVN to propagate simple conditionals. This fixes PR3921.Owen Anderson2009-04-011-10/+38
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68172 91177308-0d34-0410-b5e6-96231b3b80d8
* Make the key of ValueRankMap an AssertingVH, so that we die violentlyChris Lattner2009-03-311-6/+7
| | | | | | | if it dangles. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68150 91177308-0d34-0410-b5e6-96231b3b80d8
* Throttle back "fold select into operand" transformation. InstCombine should ↵Evan Cheng2009-03-311-52/+81
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | not generate selects of two constants unless they are selects of 0 and 1. e.g. define i32 @t1(i32 %c, i32 %x) nounwind { %t1 = icmp eq i32 %c, 0 %t2 = lshr i32 %x, 18 %t3 = select i1 %t1, i32 %t2, i32 %x ret i32 %t3 } was turned into define i32 @t2(i32 %c, i32 %x) nounwind { %t1 = icmp eq i32 %c, 0 %t2 = select i1 %t1, i32 18, i32 0 %t3 = lshr i32 %x, %t2 ret i32 %t3 } For most targets, that means materializing two constants and then a select. e.g. On x86-64 movl %esi, %eax shrl $18, %eax testl %edi, %edi cmovne %esi, %eax ret => xorl %eax, %eax testl %edi, %edi movl $18, %ecx cmovne %eax, %ecx movl %esi, %eax shrl %cl, %eax ret Also, the optimizer and codegen can reason about shl / and / add, etc. by a constant. This optimization will hinder optimizations using ComputeMaskedBits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68142 91177308-0d34-0410-b5e6-96231b3b80d8
* Update call graph after inlining invoke.Devang Patel2009-03-311-2/+19
| | | | | | | Patch by Jay Foad. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68120 91177308-0d34-0410-b5e6-96231b3b80d8
* Loop Index Split can eliminate a loop if it can determin if loop body is ↵Devang Patel2009-03-301-8/+24
| | | | | | executed only once. There was a bug in determining IV based value of the iteration for which the loop body is executed. Fix it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68071 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r67798: it breaks llvm-gcc bootstrap on x86-64-linux, presumably due toDuncan Sands2009-03-271-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | a miscompilation. make[4]: Entering directory `gcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include' if [ ! -d "./x86_64-unknown-linux-gnu/bits/stdtr1c++.h.gch" ]; then \ mkdir -p ./x86_64-unknown-linux-gnu/bits/stdtr1c++.h.gch; \ fi; \ gcc-4.2.llvm-objects/./gcc/xgcc -shared-libgcc -Bgcc-4.2.llvm-objects/./gcc -nostdinc++ -Lgcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/src -Lgcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs -B/usr/local/gnat-llvm/x86_64-unknown-linux-gnu/bin/ -B/usr/local/gnat-llvm/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/gnat-llvm/x86_64-unknown-linux-gnu/include -isystem /usr/local/gnat-llvm/x86_64-unknown-linux-gnu/sys-include -Winvalid-pch -Wno-deprecated -x c++-header -g -O2 -D_GNU_SOURCE -Igcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include/x86_64-unknown-linux-gnu -Igcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include -Igcc-4.2.llvm/libstdc++-v3/libsupc++ -O2 -g gcc-4.2.llvm/libstdc++-v3/include/precompiled/stdtr1c++.h -o x86_64-unknown-linux-gnu/bits/stdtr1c++.h.gch/O2g.gch In file included from gcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include/tr1/repeat.h:247, from gcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include/tr1/functional:1098, from gcc-4.2.llvm/libstdc++-v3/include/precompiled/stdtr1c++.h:53: gcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include/tr1/functional_iterate.h:417: internal compiler error: in ggc_recalculate_in_use_p, at ggc-page.c:1602 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://llvm.org/bugs/> for instructions. make[4]: *** [x86_64-unknown-linux-gnu/bits/stdtr1c++.h.gch/O2g.gch] Error 1 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67839 91177308-0d34-0410-b5e6-96231b3b80d8
* One more place to skip debug info.Dale Johannesen2009-03-271-7/+14
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67811 91177308-0d34-0410-b5e6-96231b3b80d8
* While hoisting an instruction, update alias info set tracker.Devang Patel2009-03-261-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67798 91177308-0d34-0410-b5e6-96231b3b80d8
* Skip debug info one more place. (This one getsDale Johannesen2009-03-261-6/+12
| | | | | | | | | called from llc, not opt, but it's an IR level optimization nevertheless.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67724 91177308-0d34-0410-b5e6-96231b3b80d8
* Before deleting a basic block, give other loop passes a chance cleanup ↵Devang Patel2009-03-251-1/+1
| | | | | | analysis values, related to the instructions in the basic block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67719 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR3874 by restoring a condition I removed, but making it moreChris Lattner2009-03-251-1/+2
| | | | | | | precise than it used to be. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67662 91177308-0d34-0410-b5e6-96231b3b80d8
* oops, I intended to remove this, not comment it out. Thanks Duncan!Chris Lattner2009-03-241-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67657 91177308-0d34-0410-b5e6-96231b3b80d8
* canonicalize inttoptr and ptrtoint instructions which cast pointers Chris Lattner2009-03-241-5/+37
| | | | | | | | | to/from integer types that are not intptr_t to convert to intptr_t then do an integer conversion to the dest type. This exposes the cast to the optimizer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67638 91177308-0d34-0410-b5e6-96231b3b80d8
* two changes:Chris Lattner2009-03-241-45/+29
| | | | | | | | | | | | 1. Make instcombine always canonicalize trunc x to i1 into an icmp(x&1). This exposes the AND to other instcombine xforms and is more of what the code generator expects. 2. Rewrite the remaining trunc pattern match to use 'match', which simplifies it a lot. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67635 91177308-0d34-0410-b5e6-96231b3b80d8
* Use a SmallPtrSet instead of std::set.Dale Johannesen2009-03-231-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67578 91177308-0d34-0410-b5e6-96231b3b80d8
* Now that errs() is properly non-buffered, there's no need toDan Gohman2009-03-231-2/+1
| | | | | | | explicitly flush it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67526 91177308-0d34-0410-b5e6-96231b3b80d8
* Factorize out a concept - no functionality change.Duncan Sands2009-03-213-8/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67454 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix instcombine to not introduce undefined shifts when merging twoChris Lattner2009-03-201-2/+14
| | | | | | | | shifts together. This fixes PR3851. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67411 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't load values out of global constants with weakDuncan Sands2009-03-203-6/+8
| | | | | | | | | | linkage: the value may be replaced with something different at link time. (Frontends that want to allow values to be loaded out of weak constants can give their constants weak_odr linkage). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67407 91177308-0d34-0410-b5e6-96231b3b80d8
* Clear the cached cost when removing a function inDale Johannesen2009-03-192-10/+17
| | | | | | | | | | | the inliner; prevents nondeterministic behavior when the same address is reallocated. Don't build call graph nodes for debug intrinsic calls; they're useless, and there were typically a lot of them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67311 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix comment typo.Dale Johannesen2009-03-191-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67307 91177308-0d34-0410-b5e6-96231b3b80d8
* This pass keeps a map of Instructions to Rank numbers,Dale Johannesen2009-03-191-8/+14
| | | | | | | | | | | and was deleting Instructions without clearing the corresponding map entry. This led to nondeterministic behavior if the same address got allocated to another Instruction within a short time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67306 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove strange extra semicolons.Nick Lewycky2009-03-192-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67287 91177308-0d34-0410-b5e6-96231b3b80d8
* aha, DAE does have to think about PHI nodes. Many thanks to "Dr Evil" (aka ↵Chris Lattner2009-03-181-3/+3
| | | | | | | | | Duncan) for pointing this out :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67212 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR3826 - InstComb assert with vector shift, by not calling ↵Chris Lattner2009-03-181-7/+8
| | | | | | ComputeNumSignBits on a vector. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67211 91177308-0d34-0410-b5e6-96231b3b80d8
* add an assertion to make it clear that PHI nodes are not allowed.Chris Lattner2009-03-181-1/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67210 91177308-0d34-0410-b5e6-96231b3b80d8
* Explicitly check for StoreInst, do not lose the chance to delete Zhou Sheng2009-03-181-1/+1
| | | | | | | unused loads or bitcasts. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67202 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert my previous change on Local.cpp, instead, fix the bug on scalarrepl.Zhou Sheng2009-03-182-4/+1
| | | | | | | | If the instruction has no users, it is also not only used by debug info and should not be deleted. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67194 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a bug.Zhou Sheng2009-03-181-0/+3
| | | | | | | If I->use_empty(), this method should return false. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67180 91177308-0d34-0410-b5e6-96231b3b80d8
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