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2011-05-06Update comments.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130987 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-06More dead code elimination.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130985 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-06Dead code elimination.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130984 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-06Re-revert r130877; it's apparently causing a regression on 197.parser,Eli Friedman
possibly related to cbnz formation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130977 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Remove DwarfTableException.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130964 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Remove the DwarfTable enum.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130959 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Remove little used statistical counter.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130955 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Implement a really simple DwarfSjLjException.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130947 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05List all exception types in a switch.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130944 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05ARM post RA scheduler compile time fix.Andrew Trick
BuildSchedGraph was quadratic in the number of calls in the basic block. After this fix, it keeps only a single call at the top of the DefList so compile time doesn't blow up on large blocks. This reduces postRA sched time on an external test case from 81s to 0.3s. Although r130800 (reduced ARM register alias defs) also partially fixes the issue by reducing the constant overhead of checking call interference by an order of magnitude. Fixes <rdar://problem/7662664> very poor compile time with post RA scheduling. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130943 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05whitespaceAndrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130942 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Allow FastISel of three-register-operand instructions.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130934 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05If debug info for inlined function is missing then handle it gracefully.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130933 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Add some statistics to the splitting and spilling frameworks.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130931 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Avoid extra vreg copies for arguments passed in registers. Specifically, ↵Eli Friedman
this can make MachineCSE more effective in some cases (especially in small functions). PR8361 / part of rdar://problem/8259436 . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130928 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Small syntax cleanup; we don't need to #define constants in C++. No ↵Eli Friedman
functionality change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130926 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Minor correction to r130877; fixes PR9846 and hopefully the buildbot failures.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130925 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Remove a flag that would set the ".eh" symbol as .globl. MachO was the only oneBill Wendling
who used this flag, and it now emits CFI and doesn't emit this anymore. All other targets left this flag "false". <rdar://problem/8486371> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130918 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Disable physical register coalescing by default.Jakob Stoklund Olesen
Joining physregs is inherently dangerous because it uses a heuristic to avoid creating invalid code. Linear scan had an emergency spilling mechanism to deal with those rare cases. The new greedy allocator does not. The greedy register allocator is much better at taking hints, so this has almost no impact on code size and quality. The few cases where it matters show up as unit tests that now have -join-physregs enabled explicitly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130896 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04SjLj EH could produce a machine basic block that legitimately has more than oneBill Wendling
landing pad as its successor. SjLj exception handling jumps to the correct landing pad via a switch statement that's generated right before code-gen. Loosen the constraint in the machine instruction verifier to allow for this. Note, this isn't the most rigorous check since we cannot determine where that switch statement came from. But it's marginally better than turning this check off when SjLj exceptions are used. <rdar://problem/9187612> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130881 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Re-commit r130862 with a minor change to avoid an iterator running off the ↵Eli Friedman
edge in some cases. Original message: Teach MachineCSE how to do simple cross-block CSE involving physregs. This allows, for example, eliminating duplicate cmpl's on x86. Part of rdar://problem/8259436 . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130877 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Back out r130862; it appears to be breaking bootstrap.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130867 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Teach MachineCSE how to do simple cross-block CSE involving physregs. This ↵Eli Friedman
allows, for example, eliminating duplicate cmpl's on x86. Part of rdar://problem/8259436 . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130862 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Producing a DW_FORM_addr for DW_AT_stmt_list is probably correct, butRafael Espindola
it is both inefficient and unexpected by dwarfdump. Change to a DW_FORM_data4. While in here, change the predicate name to reflect that the position is not really absolute (it is an offset), just that the linker needs a relocation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130846 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Rename -disable-physical-join to -join-physregs and invert it.Jakob Stoklund Olesen
Physreg joining is still on by default, but I will turn it off shortly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130844 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-04Tighten up check for empty (i.e. no meaningful debug info) module. This ↵Devang Patel
fixes dwarf-die2.c test case from gcc test suite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130842 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-03Even if the subprogram is going to use AT_specification, emit ↵Devang Patel
DW_AT_MIPS_linkage_name. This helps gdb and fixes var-path-expr.exp regression reported by gdb testsuite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130794 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-03Gracefully handle invalid live ranges. Fix PR9831.Jakob Stoklund Olesen
Register coalescing can sometimes create live ranges that end in the middle of a basic block without any killing instruction. When SplitKit detects this, it will repair the live range by shrinking it to its uses. Live range splitting also needs to know about this. When the range shrinks so much that it becomes allocatable, live range splitting fails because it can't find a good split point. It is paranoid about making progress, so an allocatable range is considered an error. The coalescer should really not be creating these bad live ranges. They appear when coalescing dead copies. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130787 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-03If the front end has emitted llvm.dbg.cu and other debug info anchors (clang ↵Devang Patel
does it now) then use them directly. This saves one scan of entire module, to collect debug info, which in turns saves few machine cycles at compile time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130759 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-02Other parts of the SelectionDAG framework assume that targets use their ↵Owen Anderson
pointer type for vector indices. Make the vector unrolling code respect that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130733 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-02Handle <def,undef> in the second loop as well.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130718 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-02Use the PrintReg adaptor to correctly print live-in registers in debug output.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130715 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-02Only ignore <undef> use operands, keep the <def,undef> ops.Jakob Stoklund Olesen
Def operands may also have an <undef> flag, but that just means that a sub-register redef doesn't actually read the super-register. For physical registers, it has no meaning. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130714 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-02Emit debug info for global variables first.Devang Patel
This works around a limitation in gdb which is reported by following inherit.exp test failures from gdb testsuite. gdb.cp/inherit.exp: print g_vB.vB::vb gdb.cp/inherit.exp: print g_vB.vB::vx gdb.cp/inherit.exp: print g_vC.vC::vc gdb.cp/inherit.exp: print g_vC.vC::vx gdb.cp/inherit.exp: print g_vD.vB::vb ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130702 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-02Only produce the eh_frame section if we have at least one personality function.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130692 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-02Minimize the slot indexes spanned by register ranges created when splitting.Jakob Stoklund Olesen
When an interfering live range ends at a dead slot index between two instructions, make sure that the inserted copy instruction gets a slot index after the dead ones. This makes it possible to avoid the interference. Ideally, there shouldn't be interference ending at a deleted instruction, but physical register coalescing can sometimes do that to sub-registers. This fixes PR9823. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130687 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-01GCC uses a different encoding of pointers in the FDE when usingRafael Espindola
-fno-dwarf2-cfi-asm. Implement the same behavior. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130637 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-30When a physreg is live-in and live through a basic block, make sure its liveJakob Stoklund Olesen
range covers the entire block. The live range can't be terminated at a random instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130619 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-30Avoid using stale entries form the sibling value map.Jakob Stoklund Olesen
This could happen when trying to use a value that had been eliminated after dead code elimination and folding loads. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130597 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-30Use hysteresis for local live range splitting as well.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130596 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-30Add all the plumbing needed for MC to expand cfi to the old tables inRafael Espindola
the final assembly. It is the same technique used when targeting assemblers that don't support .loc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130587 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-30Update comment.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130582 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-30Use a greedy algorithm for allocating registers.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130568 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29Print out the 'nontemporal' info on a store.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130562 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29Make FastEmit_ri_ try a bit harder to succeed for supported operations; ↵Eli Friedman
FastEmit_i can fail for non-Thumb2 ARM. Makes ARMSimplifyAddress work correctly, and reduces the number of fast-isel bailouts on non-Thumb ARM. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130560 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29Hoist MCLineEntry construction AsmPrinter so that anyone who derives from ↵Devang Patel
AsmPrinter can have line number entries. PR 9810 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130518 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29The last hack for producing bit identical output with cfi on OS X.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130504 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29Change DwarfCFIException's member variables to track what it actuallyRafael Espindola
emmits: .cfi_personality, .cfi_lsda and the moves. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130503 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29Factor some code to needsCFIMoves. Avoid printing moves when we don't have to.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130501 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28Teach dwarf writer to handle complex address expression for .debug_loc entries.Devang Patel
This fixes clang generated blocks' variables' debug info. Radar 9279956. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130373 91177308-0d34-0410-b5e6-96231b3b80d8
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