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* * Pull out the meat of runOnModule into another function for clarity.Chris Lattner2004-10-081-45/+101
| | | | | | | | | | | * Do not lead dangling dead constants prevent optimization * Iterate global optimization while we're making progress. These changes allow us to be more aggressive, handling cases like GlobalOpt/iterate.llx without a problem (turning it into 'ret int 0'). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16857 91177308-0d34-0410-b5e6-96231b3b80d8
* We might as well delete the known-dead global sooner rather than later sinceChris Lattner2004-10-081-0/+2
| | | | | | | we know it is dead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16855 91177308-0d34-0410-b5e6-96231b3b80d8
* Hyphenate target-(in)dependent for more tasty grammar goodness (tm)Misha Brukman2004-10-081-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16854 91177308-0d34-0410-b5e6-96231b3b80d8
* Temporarily disable a buggy transformation until it can be fixed. This fixesChris Lattner2004-10-081-0/+5
| | | | | | | 254.gap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16853 91177308-0d34-0410-b5e6-96231b3b80d8
* Adjust paths due to moving InstrSched to lib/Target/SparcV9Misha Brukman2004-10-083-7/+7
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16852 91177308-0d34-0410-b5e6-96231b3b80d8
* InstrSched has been moved to lib/Target/SparcV9Misha Brukman2004-10-081-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16850 91177308-0d34-0410-b5e6-96231b3b80d8
* InstrSched is SparcV9-specific and so has been moved to lib/Target/SparcV9/Misha Brukman2004-10-087-3197/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16849 91177308-0d34-0410-b5e6-96231b3b80d8
* Single-space instead of double-spacing in the MakefileMisha Brukman2004-10-081-3/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16848 91177308-0d34-0410-b5e6-96231b3b80d8
* Build InstrSched as well, and all three subdirs can be built independentlyMisha Brukman2004-10-081-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16847 91177308-0d34-0410-b5e6-96231b3b80d8
* * Adjust for the move to lib/Target/SparcV9/InstrSchedMisha Brukman2004-10-081-2/+2
| | | | | | | * Rename library to mark it SparcV9-specific git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16846 91177308-0d34-0410-b5e6-96231b3b80d8
* Single-space instead of double-spacing in the MakefileMisha Brukman2004-10-082-4/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16845 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement SRA for global variables. This allows the other global variableChris Lattner2004-10-081-32/+137
| | | | | | | | | | | | optimizations to trigger much more often. This allows the elimination of several dozen more global variables in Programs/External. Note that we only do this for non-constant globals: constant globals will already be optimized out if the accesses to them permit it. This implements Transforms/GlobalOpt/globalsra.llx git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16842 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix bug: 2004-10-08-SelectSetCCFold.llx. Normally this is hidden by theChris Lattner2004-10-081-1/+2
| | | | | | | instcombine xform, which is why we didn't notice it before. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16840 91177308-0d34-0410-b5e6-96231b3b80d8
* Instcombine (X & FF00) + xx00 -> (X+xx00) & FF00, implementing and.ll:test27Chris Lattner2004-10-081-0/+25
| | | | | | | This comes up when doing adds to bitfield elements. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16836 91177308-0d34-0410-b5e6-96231b3b80d8
* Little patch to turn (shl (add X, 123), 4) -> (add (shl X, 4), 123 << 4)Chris Lattner2004-10-081-0/+3
| | | | | | | | This triggers in cases of bitfield additions, opening opportunities for future improvements. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16834 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement logical and with an immediate that consists of a contiguous blockNate Begeman2004-10-081-5/+69
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | of one or more 1 bits (may wrap from least significant bit to most significant bit) as the rlwinm rather than andi., andis., or some longer instructons sequence. int andn4(int z) { return z & -4; } int clearhi(int z) { return z & 0x0000FFFF; } int clearlo(int z) { return z & 0xFFFF0000; } int clearmid(int z) { return z & 0x00FFFF00; } int clearwrap(int z) { return z & 0xFF0000FF; } _andn4: rlwinm r3, r3, 0, 0, 29 blr _clearhi: rlwinm r3, r3, 0, 16, 31 blr _clearlo: rlwinm r3, r3, 0, 0, 15 blr _clearmid: rlwinm r3, r3, 0, 8, 23 blr _clearwrap: rlwinm r3, r3, 0, 24, 7 blr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16832 91177308-0d34-0410-b5e6-96231b3b80d8
* Several fixes and enhancements to the PPC32 backend.Nate Begeman2004-10-073-147/+154
| | | | | | | | | | | | | | | | | | | | | | | 1. Fix an illegal argument to getClassB when deciding whether or not to sign extend a byte load. 2. Initial addition of isLoad and isStore flags to the instruction .td file for eventual use in a scheduler. 3. Rewrite of how constants are handled in emitSimpleBinaryOperation so that we can emit the PowerPC shifted immediate instructions far more often. This allows us to emit the following code: int foo(int x) { return x | 0x00F0000; } _foo: .LBB_foo_0: ; entry ; IMPLICIT_DEF oris r3, r3, 15 blr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16826 91177308-0d34-0410-b5e6-96231b3b80d8
* Add ori reg, reg, 0 as a move instruction. This can be generated fromNate Begeman2004-10-071-0/+11
| | | | | | | | | | | | | | | | | | loading a 32bit constant into a register whose low halfword is all zeroes. We now omit the ori after the lis for the following C code: int bar(int y) { return y * 0x00F0000; } _bar: .LBB_bar_0: ; entry ; IMPLICIT_DEF lis r2, 15 mullw r3, r3, r2 blr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16825 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unnecessary header includeNate Begeman2004-10-071-1/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16824 91177308-0d34-0410-b5e6-96231b3b80d8
* Improve comments, no functionality changesChris Lattner2004-10-071-18/+53
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16814 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a nasty dangling pointer problem, due to a free'd pointer being left inChris Lattner2004-10-071-0/+3
| | | | | | | | a map. This caused problems if a later object happened to be allocated at the free'd object's address. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16813 91177308-0d34-0410-b5e6-96231b3b80d8
* Unfortunately the fix for the previous bug introduced the previousChris Lattner2004-10-071-41/+67
| | | | | | | | | | | exponential behavior (bork!). This patch processes stuff with an explicit SCC finder, allowing the algorithm to be more clear, efficient, and also (as a bonus) correct! This gets us back to taking 0.6s to disassemble my horrible .bc file that previously took something > 30 mins. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16811 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a bug in my previous change. Unfortunately this reverts most of theChris Lattner2004-10-071-3/+4
| | | | | | | speedup, but has the advantage of not breaking a bunch of programs! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16806 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a bug in the safety analysis routineChris Lattner2004-10-071-3/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16804 91177308-0d34-0410-b5e6-96231b3b80d8
* Comment cleanupsChris Lattner2004-10-071-4/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16803 91177308-0d34-0410-b5e6-96231b3b80d8
* * Rename pass to globalopt, since we do more than just constifyChris Lattner2004-10-071-81/+184
| | | | | | | | | | | | | | | | | * Instead of handling dead functions specially, just nuke them. * Be more aggressive about cleaning up after constification, in particular, handle getelementptr instructions and constantexprs. * Be a little bit more structured about how we process globals. *** Delete globals that are only stored to, and never read. These are clearly not useful, so they should go. This implements deadglobal.llx This last one triggers quite a few times. In particular, 2208 in the external tests, 1865 of which are in 252.eon. This shrinks eon from 1995094 to 1732341 bytes of bytecode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16802 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement GlobalConstifier/trivialstore.llx, and also do someChris Lattner2004-10-061-3/+52
| | | | | | | | | | | | | | | | | | | | | | | | | simplifications of the resultant program to avoid making later passes do it all. This allows us to constify globals that just have the same constant that they are initialized stored into them. Suprisingly this comes up ALL of the freaking time, dozens of times in SPEC, 30 times in vortex alone. For example, on 256.bzip2, it allows us to constify these two globals: %smallMode = internal global ubyte 0 ; <ubyte*> [#uses=8] %verbosity = internal global int 0 ; <int*> [#uses=49] Which (with later optimizations) results in the bytecode file shrinking from 82286 to 69686 bytes! Lets hear it for IPO :) For the record, it's nuking lots of "if (verbosity > 2) { do lots of stuff }" code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16793 91177308-0d34-0410-b5e6-96231b3b80d8
* Dont' let null nodes sneak past cast instructionsChris Lattner2004-10-061-1/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16779 91177308-0d34-0410-b5e6-96231b3b80d8
* Change Type::isAbstract to have better comments, a more correct nameChris Lattner2004-10-061-12/+19
| | | | | | | | | | | | | (PromoteAbstractToConcrete), and to use a set to avoid recomputation. In particular, this set eliminates the potentially exponential cases from this little recursive algorithm. On a particularly nasty testcase, llvm-dis on the .bc file went from 34 minutes (which is when I killed it, it still hadn't finished) to 0.57s. Remember kids, exponential algorithms are bad. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16772 91177308-0d34-0410-b5e6-96231b3b80d8
* Correct some typeosChris Lattner2004-10-061-3/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16770 91177308-0d34-0410-b5e6-96231b3b80d8
* Instcombine: -(X sdiv C) -> (X sdiv -C), tested by sub.ll:test16Chris Lattner2004-10-061-0/+8
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16769 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove debugging code, fix encoding problem. This fixes the problemsChris Lattner2004-10-062-3/+2
| | | | | | | the JIT had last night. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16766 91177308-0d34-0410-b5e6-96231b3b80d8
* Turning on fsel code gen now that we can do so would be good.Nate Begeman2004-10-061-11/+10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16765 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement floating point select for lt, gt, le, ge using the powerpc fselNate Begeman2004-10-061-25/+113
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | instruction. Now, rather than emitting the following loop out of bisect: .LBB_main_19: ; no_exit.0.i rlwinm r3, r2, 3, 0, 28 lfdx f1, r3, r27 addis r3, r30, ha16(.CPI_main_1-"L00000$pb") lfd f2, lo16(.CPI_main_1-"L00000$pb")(r3) fsub f2, f2, f1 addis r3, r30, ha16(.CPI_main_1-"L00000$pb") lfd f4, lo16(.CPI_main_1-"L00000$pb")(r3) fcmpu cr0, f1, f4 bge .LBB_main_64 ; no_exit.0.i .LBB_main_63: ; no_exit.0.i b .LBB_main_65 ; no_exit.0.i .LBB_main_64: ; no_exit.0.i fmr f2, f1 .LBB_main_65: ; no_exit.0.i addi r3, r2, 1 rlwinm r3, r3, 3, 0, 28 lfdx f1, r3, r27 addis r3, r30, ha16(.CPI_main_1-"L00000$pb") lfd f4, lo16(.CPI_main_1-"L00000$pb")(r3) fsub f4, f4, f1 addis r3, r30, ha16(.CPI_main_1-"L00000$pb") lfd f5, lo16(.CPI_main_1-"L00000$pb")(r3) fcmpu cr0, f1, f5 bge .LBB_main_67 ; no_exit.0.i .LBB_main_66: ; no_exit.0.i b .LBB_main_68 ; no_exit.0.i .LBB_main_67: ; no_exit.0.i fmr f4, f1 .LBB_main_68: ; no_exit.0.i fadd f1, f2, f4 addis r3, r30, ha16(.CPI_main_2-"L00000$pb") lfd f2, lo16(.CPI_main_2-"L00000$pb")(r3) fmul f1, f1, f2 rlwinm r3, r2, 3, 0, 28 lfdx f2, r3, r28 fadd f4, f2, f1 fcmpu cr0, f4, f0 bgt .LBB_main_70 ; no_exit.0.i .LBB_main_69: ; no_exit.0.i b .LBB_main_71 ; no_exit.0.i .LBB_main_70: ; no_exit.0.i fmr f0, f4 .LBB_main_71: ; no_exit.0.i fsub f1, f2, f1 addi r2, r2, -1 fcmpu cr0, f1, f3 blt .LBB_main_73 ; no_exit.0.i .LBB_main_72: ; no_exit.0.i b .LBB_main_74 ; no_exit.0.i .LBB_main_73: ; no_exit.0.i fmr f3, f1 .LBB_main_74: ; no_exit.0.i cmpwi cr0, r2, -1 fmr f16, f0 fmr f17, f3 bgt .LBB_main_19 ; no_exit.0.i We emit this instead: .LBB_main_19: ; no_exit.0.i rlwinm r3, r2, 3, 0, 28 lfdx f1, r3, r27 addis r3, r30, ha16(.CPI_main_1-"L00000$pb") lfd f2, lo16(.CPI_main_1-"L00000$pb")(r3) fsub f2, f2, f1 fsel f1, f1, f1, f2 addi r3, r2, 1 rlwinm r3, r3, 3, 0, 28 lfdx f2, r3, r27 addis r3, r30, ha16(.CPI_main_1-"L00000$pb") lfd f4, lo16(.CPI_main_1-"L00000$pb")(r3) fsub f4, f4, f2 fsel f2, f2, f2, f4 fadd f1, f1, f2 addis r3, r30, ha16(.CPI_main_2-"L00000$pb") lfd f2, lo16(.CPI_main_2-"L00000$pb")(r3) fmul f1, f1, f2 rlwinm r3, r2, 3, 0, 28 lfdx f2, r3, r28 fadd f4, f2, f1 fsub f5, f0, f4 fsel f0, f5, f0, f4 fsub f1, f2, f1 addi r2, r2, -1 fsub f2, f1, f3 fsel f3, f2, f3, f1 cmpwi cr0, r2, -1 fmr f16, f0 fmr f17, f3 bgt .LBB_main_19 ; no_exit.0.i git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16764 91177308-0d34-0410-b5e6-96231b3b80d8
* Codegen signed mod by 2 or -2 more efficiently. Instead of generating:Chris Lattner2004-10-061-3/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | t: mov %EDX, DWORD PTR [%ESP + 4] mov %ECX, 2 mov %EAX, %EDX sar %EDX, 31 idiv %ECX mov %EAX, %EDX ret Generate: t: mov %ECX, DWORD PTR [%ESP + 4] *** mov %EAX, %ECX cdq and %ECX, 1 xor %ECX, %EDX sub %ECX, %EDX *** mov %EAX, %ECX ret Note that the two marked moves are redundant, and should be eliminated by the register allocator, but aren't. Compare this to GCC, which generates: t: mov %eax, DWORD PTR [%esp+4] mov %edx, %eax shr %edx, 31 lea %ecx, [%edx+%eax] and %ecx, -2 sub %eax, %ecx ret or ICC 8.0, which generates: t: movl 4(%esp), %ecx #3.5 movl $-2147483647, %eax #3.25 imull %ecx #3.25 movl %ecx, %eax #3.25 sarl $31, %eax #3.25 addl %ecx, %edx #3.25 subl %edx, %eax #3.25 addl %eax, %eax #3.25 negl %eax #3.25 subl %eax, %ecx #3.25 movl %ecx, %eax #3.25 ret #3.25 We would be in great shape if not for the moves. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16763 91177308-0d34-0410-b5e6-96231b3b80d8
* Really fix FreeBSD, which apparently doesn't tolerate the extern.Chris Lattner2004-10-062-4/+6
| | | | | | | Thanks to Jeff Cohen for pointing out my goof. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16762 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a scary bug with signed division by a power of two. We used to generate:Chris Lattner2004-10-061-6/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | s: ;; X / 4 mov %EAX, DWORD PTR [%ESP + 4] mov %ECX, %EAX sar %ECX, 1 shr %ECX, 30 mov %EDX, %EAX add %EDX, %ECX sar %EAX, 2 ret When we really meant: s: mov %EAX, DWORD PTR [%ESP + 4] mov %ECX, %EAX sar %ECX, 1 shr %ECX, 30 add %EAX, %ECX sar %EAX, 2 ret Hey, this also reduces register pressure too :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16761 91177308-0d34-0410-b5e6-96231b3b80d8
* Codegen signed divides by 2 and -2 more efficiently. In particularChris Lattner2004-10-061-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | instead of: s: ;; X / 2 movl 4(%esp), %eax movl %eax, %ecx shrl $31, %ecx movl %eax, %edx addl %ecx, %edx sarl $1, %eax ret t: ;; X / -2 movl 4(%esp), %eax movl %eax, %ecx shrl $31, %ecx movl %eax, %edx addl %ecx, %edx sarl $1, %eax negl %eax ret Emit: s: movl 4(%esp), %eax cmpl $-2147483648, %eax sbbl $-1, %eax sarl $1, %eax ret t: movl 4(%esp), %eax cmpl $-2147483648, %eax sbbl $-1, %eax sarl $1, %eax negl %eax ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16760 91177308-0d34-0410-b5e6-96231b3b80d8
* Add some new instructions. Fix the asm string for sbb32rrChris Lattner2004-10-063-3/+24
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16759 91177308-0d34-0410-b5e6-96231b3b80d8
* Reduce code growth implied by the tail duplication pass by not duplicatingChris Lattner2004-10-061-0/+75
| | | | | | | | an instruction if it can be hoisted to a common dominator of the block. This implements: test/Regression/Transforms/TailDup/MergeTest.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16758 91177308-0d34-0410-b5e6-96231b3b80d8
* FreeBSD uses GCC. Patch contributed by Jeff Cohen!Chris Lattner2004-10-062-6/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16756 91177308-0d34-0410-b5e6-96231b3b80d8
* Must include sys/stat.h before declaring a 'struct stat'Brian Gaeke2004-10-052-0/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16728 91177308-0d34-0410-b5e6-96231b3b80d8
* Make sure the const bit gets inherited correctly when linking declarationsChris Lattner2004-10-052-2/+30
| | | | | | | | of disagreeing constness. This fixes test/Regression/Linker/ConstantGlobals[123].ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16692 91177308-0d34-0410-b5e6-96231b3b80d8
* Adjust sys/stat.h inclusion so its only for SunOS.Reid Spencer2004-10-052-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16686 91177308-0d34-0410-b5e6-96231b3b80d8
* Added a couple of includes to get this to compile on Sparc.Tanya Lattner2004-10-053-2/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16685 91177308-0d34-0410-b5e6-96231b3b80d8
* Solaris doesn't have MAP_FILE.Chris Lattner2004-10-052-2/+8
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16682 91177308-0d34-0410-b5e6-96231b3b80d8
* Excise the ill-advised RLCOMP compression algorithm and simply leave theReid Spencer2004-10-041-159/+20
| | | | | | | | | previously temporary NULLCOMP implementation that merely copies the data verbatim without compression. Also, don't warn if there's no compression library as that is taken care of during configuration time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16654 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a context for the callback so different compression scenarios can beReid Spencer2004-10-041-18/+18
| | | | | | | distinguished. Tidy up documentation. Thanks, Chris. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16652 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix build if not HAVE_BZIP2Chris Lattner2004-10-041-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16650 91177308-0d34-0410-b5e6-96231b3b80d8
* First version of the MappedFile abstraction for operating system idependentReid Spencer2004-10-0412-0/+506
| | | | | | | | | mapping of files. This first version uses mmap where its available. The class needs to implement an alternate mechanism based on malloc'd memory and file reading/writing for platforms without virtual memory. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16649 91177308-0d34-0410-b5e6-96231b3b80d8
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