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* Avoid spilling stack slots... to stack slots.Chris Lattner2005-09-271-0/+6
| | | | llvm-svn: 23478
* Completely rewrite 'correct' eh support. This changes how setjmp insertionChris Lattner2005-09-271-140/+301
| | | | | | | | | | | | | | | | | is performed so it is only at most once per function that contains an invoke instead of once per invoke in the function. This patch has the following perks: 1. It fixes PR631, which complains about slowness. 2. If fixes PR240, which complains about non-volatile vars being live across setjmp/longjmps. 3. It improves (but does not fix) the jmpbuf alignment issue on itanium by not forcing the jmpbufs to always be 8-bytes off the alignment of the structure. 4. It speeds up 253.perlbmk from 338s to 13.70s (a 25x improvement!), making us now about 4% faster than GCC. Further improvements are also possible. llvm-svn: 23477
* Make the pass name simplerChris Lattner2005-09-271-1/+1
| | | | llvm-svn: 23476
* allow demotion to volatile values, add support for invokeChris Lattner2005-09-271-12/+15
| | | | llvm-svn: 23473
* Add support for external calls that we know how to constant fold. This ↵Chris Lattner2005-09-271-11/+20
| | | | | | | | implements ctor-list-opt.ll:CTOR8 llvm-svn: 23465
* Fix a bug where we would evaluate stores into linkonce objects which could beChris Lattner2005-09-271-1/+6
| | | | | | potentially replaced at link-time. llvm-svn: 23463
* Implement support for static constructors with calls in them. This is usefulChris Lattner2005-09-271-23/+54
| | | | | | | | because gccas runs globalopt before inlining. This implements ctor-list-opt.ll:CTOR7 llvm-svn: 23462
* Refactor this code a bit, no functionality changes.Chris Lattner2005-09-271-22/+40
| | | | llvm-svn: 23460
* Remove some dead code. ctor evaluation subsumes empty ctor elimChris Lattner2005-09-261-12/+0
| | | | llvm-svn: 23453
* Add support for alloca, implementing ctor-list-opt.ll:CTOR6Chris Lattner2005-09-261-17/+48
| | | | llvm-svn: 23452
* Add a debug printout, fix a crash on kc++Chris Lattner2005-09-261-1/+6
| | | | llvm-svn: 23450
* Implement loads/stores through GEP's of globals. This implementsChris Lattner2005-09-261-6/+98
| | | | | | ctor-list-opt.ll:CTOR5. llvm-svn: 23449
* Replace TraverseGEPInitializer with ConstantFoldLoadThroughGEPConstantExprChris Lattner2005-09-261-17/+5
| | | | llvm-svn: 23447
* Eliminate GetGEPGlobalInitializer in favor of the more powerfulChris Lattner2005-09-261-27/+1
| | | | | | ConstantFoldLoadThroughGEPConstantExpr function in the utils lib. llvm-svn: 23446
* Factor the GetGEPGlobalInitializer out of this pass and into Transforms/UtilsChris Lattner2005-09-261-44/+2
| | | | | | as ConstantFoldLoadThroughGEPConstantExpr. llvm-svn: 23445
* Move the ConstantFoldLoadThroughGEPConstantExpr function out of the InstCombineChris Lattner2005-09-261-1/+45
| | | | | | pass. llvm-svn: 23444
* add a commentChris Lattner2005-09-261-0/+3
| | | | llvm-svn: 23442
* Add support for getelementptr, load, and correctly reject volatile stores.Chris Lattner2005-09-261-0/+29
| | | | llvm-svn: 23441
* Add support for br/brcond/switch and phiChris Lattner2005-09-261-3/+47
| | | | llvm-svn: 23439
* Add a simple interpreter to this code, allowing us to statically evaluateChris Lattner2005-09-261-4/+110
| | | | | | global ctors that are simple enough. This implements ctor-list-opt.ll:CTOR2. llvm-svn: 23437
* factor some code into a InstallGlobalCtors method, add comments. No ↵Chris Lattner2005-09-261-35/+52
| | | | | | functionality change. llvm-svn: 23435
* Make the global opt optimizer work on modules with a null terminator, byChris Lattner2005-09-261-8/+13
| | | | | | accepting the null even with a non-65535 init prio llvm-svn: 23434
* Factor this code out into a few methods.Chris Lattner2005-09-261-33/+190
| | | | | | | | | | | | | Implement the start of global ctor optimization. It is currently smart enough to remove the global ctor for cases like this: struct foo { foo() {} } x; ... saving a bit of startup time for the program. llvm-svn: 23433
* Fix some logic I broke that caused a regression onChris Lattner2005-09-251-3/+5
| | | | | | SimplifyLibCalls/2005-05-20-sprintf-crash.ll llvm-svn: 23430
* Move MaskedValueIsZero up.Chris Lattner2005-09-241-77/+146
| | | | | | Match a bunch of idioms for sign extensions, implementing InstCombine/signext.ll llvm-svn: 23428
* Simplify this code a bit by relying on recursive simplification. SupportChris Lattner2005-09-241-51/+43
| | | | | | | | sprintf("%s", P)'s that have uses. s/hasNUses(0)/use_empty()/ llvm-svn: 23425
* remove some debugging codeChris Lattner2005-09-231-1/+0
| | | | llvm-svn: 23411
* Fold two consequtive branches that share a common destination between them.Chris Lattner2005-09-231-33/+119
| | | | | | | This implements SimplifyCFG/branch-fold.ll, and is useful on ?:/min/max heavy code llvm-svn: 23410
* simplify some logic furtherChris Lattner2005-09-231-6/+1
| | | | llvm-svn: 23408
* pull a bunch of logic out of SimplifyCFG into a helper fnChris Lattner2005-09-231-112/+112
| | | | llvm-svn: 23407
* Start threading across blocks with code in them, so long as the code doesChris Lattner2005-09-201-15/+64
| | | | | | | | | not define a value that is used outside of it's block. This catches many more simplifications, e.g. 854 in 176.gcc, 137 in vpr, etc. This implements branch-phi-thread.ll:test3.ll llvm-svn: 23397
* Implement merging of blocks with the same condition if the block has multipleChris Lattner2005-09-201-21/+59
| | | | | | predecessors. This implements branch-phi-thread.ll::test1 llvm-svn: 23395
* Reject a case we don't handle yetChris Lattner2005-09-191-1/+3
| | | | llvm-svn: 23393
* remove debugging code :-/Chris Lattner2005-09-191-2/+0
| | | | llvm-svn: 23392
* Implement SimplifyCFG/branch-phi-thread.ll, the most trivial case of threadingChris Lattner2005-09-191-0/+73
| | | | | | | control across branches with determined outcomes. More generality to follow. This triggers a couple thousand times in specint. llvm-svn: 23391
* Refactor this code a bit and make it more general. This now compiles:Chris Lattner2005-09-181-24/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct S { unsigned int i : 6, j : 11, k : 15; } b; void plus2 (unsigned int x) { b.j += x; } To: _plus2: lis r2, ha16(L_b$non_lazy_ptr) lwz r2, lo16(L_b$non_lazy_ptr)(r2) lwz r4, 0(r2) slwi r3, r3, 6 add r3, r4, r3 rlwimi r3, r4, 0, 26, 14 stw r3, 0(r2) blr instead of: _plus2: lis r2, ha16(L_b$non_lazy_ptr) lwz r2, lo16(L_b$non_lazy_ptr)(r2) lwz r4, 0(r2) rlwinm r5, r4, 26, 21, 31 add r3, r5, r3 rlwimi r4, r3, 6, 15, 25 stw r4, 0(r2) blr by eliminating an 'and'. I'm pretty sure this is as small as we can go :) llvm-svn: 23386
* CompileChris Lattner2005-09-181-31/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct S { unsigned int i : 6, j : 11, k : 15; } b; void plus2 (unsigned int x) { b.j += x; } to: plus2: mov %EAX, DWORD PTR [b] mov %ECX, %EAX and %ECX, 131008 mov %EDX, DWORD PTR [%ESP + 4] shl %EDX, 6 add %EDX, %ECX and %EDX, 131008 and %EAX, -131009 or %EDX, %EAX mov DWORD PTR [b], %EDX ret instead of: plus2: mov %EAX, DWORD PTR [b] mov %ECX, %EAX shr %ECX, 6 and %ECX, 2047 add %ECX, DWORD PTR [%ESP + 4] shl %ECX, 6 and %ECX, 131008 and %EAX, -131009 or %ECX, %EAX mov DWORD PTR [b], %ECX ret llvm-svn: 23385
* Generalize this transform, using MaskedValueIsZero, allowing us to compile:Chris Lattner2005-09-181-14/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | struct S { unsigned int i : 6, j : 11, k : 15; } b; void plus3 (unsigned int x) { b.k += x; } To: plus3: mov %EAX, DWORD PTR [%ESP + 4] shl %EAX, 17 add DWORD PTR [b], %EAX ret instead of: plus3: mov %EAX, DWORD PTR [%ESP + 4] shl %EAX, 17 mov %ECX, DWORD PTR [b] add %EAX, %ECX and %EAX, -131072 and %ECX, 131071 or %ECX, %EAX mov DWORD PTR [b], %ECX ret llvm-svn: 23384
* fix typeoChris Lattner2005-09-181-1/+1
| | | | llvm-svn: 23383
* Remove unintentionally committed codeChris Lattner2005-09-181-3/+0
| | | | llvm-svn: 23382
* implement shift.ll:test25. This compiles:Chris Lattner2005-09-181-3/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct S { unsigned int i : 6, j : 11, k : 15; } b; void plus3 (unsigned int x) { b.k += x; } to: _plus3: lis r2, ha16(L_b$non_lazy_ptr) lwz r2, lo16(L_b$non_lazy_ptr)(r2) lwz r3, 0(r2) rlwinm r4, r3, 0, 0, 14 add r4, r4, r3 rlwimi r4, r3, 0, 15, 31 stw r4, 0(r2) blr instead of: _plus3: lis r2, ha16(L_b$non_lazy_ptr) lwz r2, lo16(L_b$non_lazy_ptr)(r2) lwz r4, 0(r2) srwi r5, r4, 17 add r3, r5, r3 slwi r3, r3, 17 rlwimi r3, r4, 0, 15, 31 stw r3, 0(r2) blr llvm-svn: 23381
* Implement add.ll:test29. Codegening:Chris Lattner2005-09-181-0/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct S { unsigned int i : 6, j : 11, k : 15; } b; void plus1 (unsigned int x) { b.i += x; } as: _plus1: lis r2, ha16(L_b$non_lazy_ptr) lwz r2, lo16(L_b$non_lazy_ptr)(r2) lwz r4, 0(r2) add r3, r4, r3 rlwimi r3, r4, 0, 0, 25 stw r3, 0(r2) blr instead of: _plus1: lis r2, ha16(L_b$non_lazy_ptr) lwz r2, lo16(L_b$non_lazy_ptr)(r2) lwz r4, 0(r2) rlwinm r5, r4, 0, 26, 31 add r3, r5, r3 rlwimi r3, r4, 0, 0, 25 stw r3, 0(r2) blr llvm-svn: 23379
* remove debug outputChris Lattner2005-09-181-1/+0
| | | | llvm-svn: 23377
* Implement or.ll:test21. This teaches instcombine to be able to turn this:Chris Lattner2005-09-181-3/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct { unsigned int bit0:1; unsigned int ubyte:31; } sdata; void foo() { sdata.ubyte++; } into this: foo: add DWORD PTR [sdata], 2 ret instead of this: foo: mov %EAX, DWORD PTR [sdata] mov %ECX, %EAX add %ECX, 2 and %ECX, -2 and %EAX, 1 or %EAX, %ECX mov DWORD PTR [sdata], %EAX ret llvm-svn: 23376
* Fix the regression last night compiling povrayChris Lattner2005-09-141-2/+3
| | | | llvm-svn: 23348
* Add a simple xform to simplify array accesses with casts in the way.Chris Lattner2005-09-131-2/+62
| | | | | | | This is useful for 178.galgel where resolution of dope vectors (by the optimizer) causes the scales to become apparent. llvm-svn: 23328
* Fix an issue where LSR would miss rewriting a use of an IV expression by a ↵Chris Lattner2005-09-131-4/+8
| | | | | | | | | PHI node that is not the original PHI. This fixes up a dot-product loop in galgel, speeding it up from 18.47s to 16.13s. llvm-svn: 23327
* Add a helper function, allowing us to simplify some code a bit, changingChris Lattner2005-09-131-39/+47
| | | | | | indentation, no functionality change llvm-svn: 23325
* Implement a simple xform to turn code like this:Chris Lattner2005-09-121-0/+66
| | | | | | | | | if () { store A -> P; } else { store B -> P; } into a PHI node with one store, in the most trival case. This implements load.ll:test10. llvm-svn: 23324
* Another load-peephole optimization: do gcse when two loads are next toChris Lattner2005-09-121-2/+5
| | | | | | each other. This implements InstCombine/load.ll:test9 llvm-svn: 23322
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