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2005-09-02Avoid creating garbage instructions, just move the old add instructionChris Lattner
to where we need it when converting -(A+B+C) -> -A + -B + -C. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23213 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02new testcase for recent bugfixChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23212 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02add some assertions and fix problems where reassociate could access theChris Lattner
Ops vector out of range git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23211 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02Fix VC++ build errorsJeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23210 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02Restore this patch now that the latent bug has been fixedChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23209 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02Make sure to legalize assert[zs]ext's operand correctlyChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23208 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02Revert the previous patch which causes a mysterious regression in toast.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23207 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02Teach live intervals to not crash on dead livein regsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23206 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02For values that are live across basic blocks and need promotion, use ANY_EXTENDChris Lattner
instead of ZERO_EXTEND to eliminate extraneous extensions. This eliminates dead zero extensions on formal arguments and other cases on PPC, implementing the newly tightened up test/Regression/CodeGen/PowerPC/small-arguments.ll test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23205 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02legalize ANY_EXTEND appropriatelyChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23204 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02Add support for ANY_EXTEND and add a few minor folds for itChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23203 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02Handle any_extend like zextChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23202 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02Handle ANY_EXTEND like ZERO_EXTEND. Simplify the extend/truncate code onChris Lattner
the observation that it only has to handle i1 -> i64 and i64 -> i1. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23201 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02Add a new ANY_EXTEND node, which operates like an extension but has undefinedChris Lattner
top bits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23200 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02This should permit NOT and's, not even dead ones.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23199 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01Implement small-arguments.ll:test3 by teaching the DAG optimizer thatChris Lattner
the results of calls to functions returning small values are properly sign/zero extended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23198 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01Another case that shouldn't have sign extends: functions returning shortChris Lattner
are known to return properly sign extended values, no need for an explicit extension. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23197 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01Fix some code in the current node combining code, spotted when it was movedNate Begeman
over to DAGCombiner.cpp 1. Don't assume that SetCC returns i1 when folding (xor (setcc) constant) 2. Don't duplicate code in folding AND with AssertZext that is handled by MaskedValueIsZero git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23196 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01Implement first round of feedback from chris (there's still a couple thingsNate Begeman
left to do). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23195 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01Align functions to 16-byte boundaries, to eliminate noise in performance ↵Chris Lattner
measurements. This improves the performance of 'treeadd' by about 20% with the dag isel, restoring it to the pattern-isel level (which happens to get the alignment right). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23194 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01Local labels on darwin apparently start with just 'L', not .L like otherChris Lattner
platforms. This reduces executable size and makes shark realize the actual bounds of functions instead of showing each MBB as a function :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23193 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-011. Use SubtargetFeatures in llc/lli.Jim Laskey
2. Propagate feature "string" to all targets. 3. Implement use of SubtargetFeatures in PowerPCTargetSubtarget. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23192 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01This new class provides support for platform specific "features". The intentJim Laskey
is to manage processor specific attributes from the command line. See examples of use in llc/lli and PowerPCTargetSubtarget. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23191 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01Implement dynamic allocas correctly. In particular, because we were copyingChris Lattner
directly out of R1 (without using a CopyFromReg, which uses a chain), multiple allocas were getting CSE'd together, producing bogus code. For this: int %foo(bool %X, int %A, int %B) { br bool %X, label %T, label %F F: %G = alloca int %H = alloca int store int %A, int* %G store int %B, int* %H %R = load int* %G ret int %R T: ret int 0 } We were generating: _foo: stwu r1, -16(r1) stw r31, 4(r1) or r31, r1, r1 stw r1, 12(r31) cmpwi cr0, r3, 0 bne cr0, .LBB_foo_2 ; T .LBB_foo_1: ; F li r2, 16 subf r2, r2, r1 ;; One alloca or r1, r2, r2 or r3, r1, r1 or r1, r2, r2 or r2, r1, r1 stw r4, 0(r3) stw r5, 0(r2) lwz r3, 0(r3) lwz r1, 12(r31) lwz r31, 4(r31) lwz r1, 0(r1) blr .LBB_foo_2: ; T li r3, 0 lwz r1, 12(r31) lwz r31, 4(r31) lwz r1, 0(r1) blr Now we generate: _foo: stwu r1, -16(r1) stw r31, 4(r1) or r31, r1, r1 stw r1, 12(r31) cmpwi cr0, r3, 0 bne cr0, .LBB_foo_2 ; T .LBB_foo_1: ; F or r2, r1, r1 li r3, 16 subf r2, r3, r2 ;; Alloca 1 or r1, r2, r2 or r2, r1, r1 or r6, r1, r1 subf r3, r3, r6 ;; Alloca 2 or r1, r3, r3 or r3, r1, r1 stw r4, 0(r2) stw r5, 0(r3) lwz r3, 0(r2) lwz r1, 12(r31) lwz r31, 4(r31) lwz r1, 0(r1) blr .LBB_foo_2: ; T li r3, 0 lwz r1, 12(r31) lwz r31, 4(r31) lwz r1, 0(r1) blr This fixes Povray and SPASS with the dag isel, the last two failing cases. Tommorow we will hopefully turn it on by default! :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23190 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01Fix a bug where we were useing HA to get the high part, which seems like itChris Lattner
could cause a miscompile. Fixing this didn't fix the two programs that fail though. :( This also changes the implementation to follow the pattern selector more closely, causing us to select 0 to li instead of lis. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23189 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01Do not select the operands being passed into SelectCC. IT does this itselfChris Lattner
and selecting early prevents folding immediates into the cmpw* instructions git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23188 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01It is NDEBUG not _NDEBUGChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23186 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01Add the rest of the currently implemented visit routines to the switchNate Begeman
statement in visit(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23185 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01First pass at the DAG Combiner. It isn't used anywhere yet, but it shouldNate Begeman
be mostly functional. It currently has all folds from SelectionDAG.cpp that do not involve a condition code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23184 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01Add regression test for efficient codegen of i32 x i32 -> hi32(i64) asNate Begeman
mulhs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23183 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31remove an inappropriate commentChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23182 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31If a function has live ins/outs, print themChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23181 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Move FCTIWZ handling out of the instruction selectors and into legalization,Chris Lattner
getting them out of the business of making stack slots. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23180 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Remove dead codeChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23179 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Move SHL,SHR i64 -> legalizerChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23178 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Remove code that is now dead from the pattern isel.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23177 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31lower sra_parts on the dag, implementing it for the dag isel, and exposingChris Lattner
the ops to dag optimization. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23176 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Allow targets to custom expand shifts that are too large for their registersChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23173 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Add a testcase for nate's patchChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23172 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31add assert zext/sext to the dag iselChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23171 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Handle AssertSext/AssertZext nodes, fixing the regressions last night.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23170 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Fix VC++ precedence warningsJeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23169 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Enable generation of AssertSext and AssertZext in the PPC backend.Nate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23168 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Fix 'ret long' to return the high and lo parts in the right registers. ThisChris Lattner
fixes crafty and probably others. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23167 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Sigh, not my day. Fix typo.Nate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23166 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Fix a mistake in my previous patch pointed out by sabre; the AssertZextNate Begeman
case in MaskedValueIsZero was wrong. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23165 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Remove some unnecessary casts, and add the AssertZext case toNate Begeman
MaskedValueIsZero. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23164 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31Add support for count trailing zeroes, and population count. These areNate Begeman
needed for folding constants in the upcoming dag combiner. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23163 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30now that physregs can exist in the same dag with multiple types, remove someChris Lattner
ugly hacks git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23162 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30Allow physregs to occur in the dag with multiple types. Though I don't ↵Chris Lattner
likethis, it is a requirement on PPC, which can have an f32 value in r3 at onepoint in a function and a f64 value in r3 at another point. :( This fixes compilation of mesa git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23161 91177308-0d34-0410-b5e6-96231b3b80d8
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