oota-llvm.git
18 years agoMake loop-simplify produce better loops by turning PHI nodes like X = phi [X, Y]
Chris Lattner [Wed, 10 Aug 2005 02:07:32 +0000 (02:07 +0000)]
Make loop-simplify produce better loops by turning PHI nodes like X = phi [X, Y]
into just Y.  This often occurs when it seperates loops that have collapsed loop
headers.  This implements LoopSimplify/phi-node-simplify.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22746 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoNew testcase
Chris Lattner [Wed, 10 Aug 2005 02:06:35 +0000 (02:06 +0000)]
New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22745 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoAllow indvar simplify to canonicalize ANY affine IV, not just affine IVs with
Chris Lattner [Wed, 10 Aug 2005 01:12:06 +0000 (01:12 +0000)]
Allow indvar simplify to canonicalize ANY affine IV, not just affine IVs with
constant stride.  This implements Transforms/IndVarsSimplify/variable-stride-ivs.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22744 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agonew testcase
Chris Lattner [Wed, 10 Aug 2005 01:11:24 +0000 (01:11 +0000)]
new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22743 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix an obvious oops
Chris Lattner [Wed, 10 Aug 2005 00:59:40 +0000 (00:59 +0000)]
Fix an obvious oops

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22742 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agonew testcase we handle
Chris Lattner [Wed, 10 Aug 2005 00:48:11 +0000 (00:48 +0000)]
new testcase we handle

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22741 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoTeach LSR to strength reduce IVs that have a loop-invariant but non-constant stride.
Chris Lattner [Wed, 10 Aug 2005 00:45:21 +0000 (00:45 +0000)]
Teach LSR to strength reduce IVs that have a loop-invariant but non-constant stride.

For code like this:

void foo(float *a, float *b, int n, int stride_a, int stride_b) {
  int i;
  for (i=0; i<n; i++)
      a[i*stride_a] = b[i*stride_b];
}

we now emit:

.LBB_foo2_2:    ; no_exit
        lfs f0, 0(r4)
        stfs f0, 0(r3)
        addi r7, r7, 1
        add r4, r2, r4
        add r3, r6, r3
        cmpw cr0, r7, r5
        blt .LBB_foo2_2 ; no_exit

instead of:

.LBB_foo_2:     ; no_exit
        mullw r8, r2, r7     ;; multiply!
        slwi r8, r8, 2
        lfsx f0, r4, r8
        mullw r8, r2, r6     ;; multiply!
        slwi r8, r8, 2
        stfsx f0, r3, r8
        addi r2, r2, 1
        cmpw cr0, r2, r5
        blt .LBB_foo_2  ; no_exit

loops with variable strides occur pretty often.  For example, in SPECFP2K
there are 317 variable strides in 177.mesa, 3 in 179.art, 14 in 188.ammp,
56 in 168.wupwise, 36 in 172.mgrid.

Now we can allow indvars to turn functions written like this:

void foo2(float *a, float *b, int n, int stride_a, int stride_b) {
  int i, ai = 0, bi = 0;
  for (i=0; i<n; i++)
    {
      a[ai] = b[bi];
      ai += stride_a;
      bi += stride_b;
    }
}

into code like the above for better analysis.  With this patch, they generate
identical code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22740 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix Regression/Transforms/LoopStrengthReduce/phi_node_update_multiple_preds.ll
Chris Lattner [Wed, 10 Aug 2005 00:35:32 +0000 (00:35 +0000)]
Fix Regression/Transforms/LoopStrengthReduce/phi_node_update_multiple_preds.ll
by being more careful about updating PHI nodes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22739 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agonew testcase
Chris Lattner [Wed, 10 Aug 2005 00:33:01 +0000 (00:33 +0000)]
new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22738 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix some 80 column violations.
Chris Lattner [Tue, 9 Aug 2005 23:39:36 +0000 (23:39 +0000)]
Fix some 80 column violations.

Once we compute the evolution for a GEP, tell SE about it.  This allows users
of the GEP to know it, if the users are not direct.  This allows us to compile
this testcase:

void fbSolidFillmmx(int w, unsigned char *d) {
    while (w >= 64) {
        *(unsigned long long *) (d +  0) = 0;
        *(unsigned long long *) (d +  8) = 0;
        *(unsigned long long *) (d + 16) = 0;
        *(unsigned long long *) (d + 24) = 0;
        *(unsigned long long *) (d + 32) = 0;
        *(unsigned long long *) (d + 40) = 0;
        *(unsigned long long *) (d + 48) = 0;
        *(unsigned long long *) (d + 56) = 0;
        w -= 64;
        d += 64;
    }
}

into:

.LBB_fbSolidFillmmx_2:  ; no_exit
        li r2, 0
        stw r2, 0(r4)
        stw r2, 4(r4)
        stw r2, 8(r4)
        stw r2, 12(r4)
        stw r2, 16(r4)
        stw r2, 20(r4)
        stw r2, 24(r4)
        stw r2, 28(r4)
        stw r2, 32(r4)
        stw r2, 36(r4)
        stw r2, 40(r4)
        stw r2, 44(r4)
        stw r2, 48(r4)
        stw r2, 52(r4)
        stw r2, 56(r4)
        stw r2, 60(r4)
        addi r4, r4, 64
        addi r3, r3, -64
        cmpwi cr0, r3, 63
        bgt .LBB_fbSolidFillmmx_2       ; no_exit

instead of:

.LBB_fbSolidFillmmx_2:  ; no_exit
        li r11, 0
        stw r11, 0(r4)
        stw r11, 4(r4)
        stwx r11, r10, r4
        add r12, r10, r4
        stw r11, 4(r12)
        stwx r11, r9, r4
        add r12, r9, r4
        stw r11, 4(r12)
        stwx r11, r8, r4
        add r12, r8, r4
        stw r11, 4(r12)
        stwx r11, r7, r4
        add r12, r7, r4
        stw r11, 4(r12)
        stwx r11, r6, r4
        add r12, r6, r4
        stw r11, 4(r12)
        stwx r11, r5, r4
        add r12, r5, r4
        stw r11, 4(r12)
        stwx r11, r2, r4
        add r12, r2, r4
        stw r11, 4(r12)
        addi r4, r4, 64
        addi r3, r3, -64
        cmpwi cr0, r3, 63
        bgt .LBB_fbSolidFillmmx_2       ; no_exit

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22737 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoimplement two helper methods
Chris Lattner [Tue, 9 Aug 2005 23:36:33 +0000 (23:36 +0000)]
implement two helper methods

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22736 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoadd two helper methods
Chris Lattner [Tue, 9 Aug 2005 23:36:18 +0000 (23:36 +0000)]
add two helper methods

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22735 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix spelling, fix some broken canonicalizations by my last patch
Chris Lattner [Tue, 9 Aug 2005 23:09:05 +0000 (23:09 +0000)]
Fix spelling, fix some broken canonicalizations by my last patch

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22734 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoI can't believe I caught this before Misha! :)
Chris Lattner [Tue, 9 Aug 2005 23:08:53 +0000 (23:08 +0000)]
I can't believe I caught this before Misha! :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22733 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoadd a optimization note
Chris Lattner [Tue, 9 Aug 2005 22:30:57 +0000 (22:30 +0000)]
add a optimization note

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22732 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoadd cc nodes to the AllNodes list so they show up in Graphviz output
Chris Lattner [Tue, 9 Aug 2005 20:40:02 +0000 (20:40 +0000)]
add cc nodes to the AllNodes list so they show up in Graphviz output

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22731 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoAdd testcases for new rlwinm cases handled, patch by Jim Laskey!
Chris Lattner [Tue, 9 Aug 2005 20:24:16 +0000 (20:24 +0000)]
Add testcases for new rlwinm cases handled, patch by Jim Laskey!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22730 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoUpdate the targets to the new SETCC/CondCodeSDNode interfaces.
Chris Lattner [Tue, 9 Aug 2005 20:21:10 +0000 (20:21 +0000)]
Update the targets to the new SETCC/CondCodeSDNode interfaces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22729 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoEliminate the SetCCSDNode in favor of a CondCodeSDNode class. This pulls the
Chris Lattner [Tue, 9 Aug 2005 20:20:18 +0000 (20:20 +0000)]
Eliminate the SetCCSDNode in favor of a CondCodeSDNode class.  This pulls the
CC out of the SetCC operation, making SETCC a standard ternary operation and
CC's a standard DAG leaf.  This will make it possible for other node to use
CC's as operands in the future...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22728 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoMinor cleanup patch, no functionality changes. Written by Jim Laskey.
Chris Lattner [Tue, 9 Aug 2005 18:29:55 +0000 (18:29 +0000)]
Minor cleanup patch, no functionality changes.  Written by Jim Laskey.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22727 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix CodeGen/Generic/div-neg-power-2.ll, a regression from last night.
Chris Lattner [Tue, 9 Aug 2005 18:08:41 +0000 (18:08 +0000)]
Fix CodeGen/Generic/div-neg-power-2.ll, a regression from last night.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22726 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agonew reg test for a failure last night on ppc/darwin
Chris Lattner [Tue, 9 Aug 2005 18:07:45 +0000 (18:07 +0000)]
new reg test for a failure last night on ppc/darwin

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22725 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoSCEVAddExpr::get() of an empty list is invalid.
Chris Lattner [Tue, 9 Aug 2005 01:13:47 +0000 (01:13 +0000)]
SCEVAddExpr::get() of an empty list is invalid.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22724 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoThis is now implemented
Chris Lattner [Tue, 9 Aug 2005 00:19:44 +0000 (00:19 +0000)]
This is now implemented

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22723 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoImplement: LoopStrengthReduce/share_ivs.ll
Chris Lattner [Tue, 9 Aug 2005 00:18:09 +0000 (00:18 +0000)]
Implement: LoopStrengthReduce/share_ivs.ll

Two changes:
  * Only insert one PHI node for each stride.  Other values are live in
    values.  This cannot introduce higher register pressure than the
    previous approach, and can take advantage of reg+reg addressing modes.
  * Factor common base values out of uses before moving values from the
    base to the immediate fields.  This improves codegen by starting the
    stride-specific PHI node out at a common place for each IV use.

As an example, we used to generate this for a loop in swim:

.LBB_main_no_exit_2E_6_2E_i_no_exit_2E_7_2E_i_2:        ; no_exit.7.i
        lfd f0, 0(r8)
        stfd f0, 0(r3)
        lfd f0, 0(r6)
        stfd f0, 0(r7)
        lfd f0, 0(r2)
        stfd f0, 0(r5)
        addi r9, r9, 1
        addi r2, r2, 8
        addi r5, r5, 8
        addi r6, r6, 8
        addi r7, r7, 8
        addi r8, r8, 8
        addi r3, r3, 8
        cmpw cr0, r9, r4
        bgt .LBB_main_no_exit_2E_6_2E_i_no_exit_2E_7_2E_i_1

now we emit:

.LBB_main_no_exit_2E_6_2E_i_no_exit_2E_7_2E_i_2:        ; no_exit.7.i
        lfdx f0, r8, r2
        stfdx f0, r9, r2
        lfdx f0, r5, r2
        stfdx f0, r7, r2
        lfdx f0, r3, r2
        stfdx f0, r6, r2
        addi r10, r10, 1
        addi r2, r2, 8
        cmpw cr0, r10, r4
        bgt .LBB_main_no_exit_2E_6_2E_i_no_exit_2E_7_2E_i_1

As another more dramatic example, we used to emit this:

.LBB_main_L_90_no_exit_2E_0_2E_i16_no_exit_2E_1_2E_i19_2:       ; no_exit.1.i19
        lfd f0, 8(r21)
        lfd f4, 8(r3)
        lfd f5, 8(r27)
        lfd f6, 8(r22)
        lfd f7, 8(r5)
        lfd f8, 8(r6)
        lfd f9, 8(r30)
        lfd f10, 8(r11)
        lfd f11, 8(r12)
        fsub f10, f10, f11
        fadd f5, f4, f5
        fmul f5, f5, f1
        fadd f6, f6, f7
        fadd f6, f6, f8
        fadd f6, f6, f9
        fmadd f0, f5, f6, f0
        fnmsub f0, f10, f2, f0
        stfd f0, 8(r4)
        lfd f0, 8(r25)
        lfd f5, 8(r26)
        lfd f6, 8(r23)
        lfd f9, 8(r28)
        lfd f10, 8(r10)
        lfd f12, 8(r9)
        lfd f13, 8(r29)
        fsub f11, f13, f11
        fadd f4, f4, f5
        fmul f4, f4, f1
        fadd f5, f6, f9
        fadd f5, f5, f10
        fadd f5, f5, f12
        fnmsub f0, f4, f5, f0
        fnmsub f0, f11, f3, f0
        stfd f0, 8(r24)
        lfd f0, 8(r8)
        fsub f4, f7, f8
        fsub f5, f12, f10
        fnmsub f0, f5, f2, f0
        fnmsub f0, f4, f3, f0
        stfd f0, 8(r2)
        addi r20, r20, 1
        addi r2, r2, 8
        addi r8, r8, 8
        addi r10, r10, 8
        addi r12, r12, 8
        addi r6, r6, 8
        addi r29, r29, 8
        addi r28, r28, 8
        addi r26, r26, 8
        addi r25, r25, 8
        addi r24, r24, 8
        addi r5, r5, 8
        addi r23, r23, 8
        addi r22, r22, 8
        addi r3, r3, 8
        addi r9, r9, 8
        addi r11, r11, 8
        addi r30, r30, 8
        addi r27, r27, 8
        addi r21, r21, 8
        addi r4, r4, 8
        cmpw cr0, r20, r7
        bgt .LBB_main_L_90_no_exit_2E_0_2E_i16_no_exit_2E_1_2E_i19_1

we now emit:

.LBB_main_L_90_no_exit_2E_0_2E_i16_no_exit_2E_1_2E_i19_2:       ; no_exit.1.i19
        lfdx f0, r21, r20
        lfdx f4, r3, r20
        lfdx f5, r27, r20
        lfdx f6, r22, r20
        lfdx f7, r5, r20
        lfdx f8, r6, r20
        lfdx f9, r30, r20
        lfdx f10, r11, r20
        lfdx f11, r12, r20
        fsub f10, f10, f11
        fadd f5, f4, f5
        fmul f5, f5, f1
        fadd f6, f6, f7
        fadd f6, f6, f8
        fadd f6, f6, f9
        fmadd f0, f5, f6, f0
        fnmsub f0, f10, f2, f0
        stfdx f0, r4, r20
        lfdx f0, r25, r20
        lfdx f5, r26, r20
        lfdx f6, r23, r20
        lfdx f9, r28, r20
        lfdx f10, r10, r20
        lfdx f12, r9, r20
        lfdx f13, r29, r20
        fsub f11, f13, f11
        fadd f4, f4, f5
        fmul f4, f4, f1
        fadd f5, f6, f9
        fadd f5, f5, f10
        fadd f5, f5, f12
        fnmsub f0, f4, f5, f0
        fnmsub f0, f11, f3, f0
        stfdx f0, r24, r20
        lfdx f0, r8, r20
        fsub f4, f7, f8
        fsub f5, f12, f10
        fnmsub f0, f5, f2, f0
        fnmsub f0, f4, f3, f0
        stfdx f0, r2, r20
        addi r19, r19, 1
        addi r20, r20, 8
        cmpw cr0, r19, r7
        bgt .LBB_main_L_90_no_exit_2E_0_2E_i16_no_exit_2E_1_2E_i19_1

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22722 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoSuck the base value out of the UsersToProcess vector into the BasedUser
Chris Lattner [Mon, 8 Aug 2005 22:56:21 +0000 (22:56 +0000)]
Suck the base value out of the UsersToProcess vector into the BasedUser
class to simplify the code.  Fuse two loops.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22721 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoSplit MoveLoopVariantsToImediateField out from MoveImmediateValues. The
Chris Lattner [Mon, 8 Aug 2005 22:32:34 +0000 (22:32 +0000)]
Split MoveLoopVariantsToImediateField out from MoveImmediateValues.  The
first is a correctness thing, and the later is an optzn thing.  This also
is needed to support a future change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22720 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFactor out some common code, and be smarter about when to emit load hi/lo
Nate Begeman [Mon, 8 Aug 2005 22:22:56 +0000 (22:22 +0000)]
Factor out some common code, and be smarter about when to emit load hi/lo
code sequences.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22719 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoA testcase I don't want to break in the future
Chris Lattner [Mon, 8 Aug 2005 22:13:49 +0000 (22:13 +0000)]
A testcase I don't want to break in the future

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22718 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoAllow tools with "consume after" options (like lli) to take more positional
Chris Lattner [Mon, 8 Aug 2005 21:57:27 +0000 (21:57 +0000)]
Allow tools with "consume after" options (like lli) to take more positional
opts than they take directly.  Thanks to John C for pointing this problem
out to me!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22717 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoRemove getImmediateForOpcode, which is now dead.
Chris Lattner [Mon, 8 Aug 2005 21:34:13 +0000 (21:34 +0000)]
Remove getImmediateForOpcode, which is now dead.

Patch by Jim Laskey.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22716 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoAdd new immediate handling support for mul/div.
Chris Lattner [Mon, 8 Aug 2005 21:33:23 +0000 (21:33 +0000)]
Add new immediate handling support for mul/div.
Patch by Jim Laskey!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22715 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoAdd support for OR/XOR/SUB immediates that are handled with the new immediate
Chris Lattner [Mon, 8 Aug 2005 21:30:29 +0000 (21:30 +0000)]
Add support for OR/XOR/SUB immediates that are handled with the new immediate
way.  This allows ORI/ORIS pairs, for example.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22714 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoModify the ISD::AND opcode case to use new immediate constant predicates.
Chris Lattner [Mon, 8 Aug 2005 21:24:57 +0000 (21:24 +0000)]
Modify the ISD::AND opcode case to use new immediate constant predicates.
Includes wider support for rotate and mask cases.

Patch by Jim Laskey.

I've requested that Jim add new regression tests the newly handled cases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22712 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoModify the ISD::ADD opcode case to use new immediate constant predicates.
Chris Lattner [Mon, 8 Aug 2005 21:21:03 +0000 (21:21 +0000)]
Modify the ISD::ADD opcode case to use new immediate constant predicates.
Includes support for 32-bit constants using addi/addis.

Patch by Jim Laskey.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22711 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoModify existing support functions to use new immediate constant predicates.
Chris Lattner [Mon, 8 Aug 2005 21:12:35 +0000 (21:12 +0000)]
Modify existing support functions to use new immediate constant predicates.
Patch by Jim Laskey

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22710 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoAdd support predicates for future immediate constant changes.
Chris Lattner [Mon, 8 Aug 2005 21:10:27 +0000 (21:10 +0000)]
Add support predicates for future immediate constant changes.
Patch by Jim Laskey

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22709 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoMove IsRunOfOnes to a more logical place and rename to a proper predicate form
Chris Lattner [Mon, 8 Aug 2005 21:08:09 +0000 (21:08 +0000)]
Move IsRunOfOnes to a more logical place and rename to a proper predicate form
(lowercase isXXX).

Patch by Jim Laskey.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22708 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix JIT encoding of ppc mfocrf instruction; the operands were reversed
Nate Begeman [Mon, 8 Aug 2005 20:04:52 +0000 (20:04 +0000)]
Fix JIT encoding of ppc mfocrf instruction; the operands were reversed

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22707 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoUse the new 'moveBefore' method to simplify some code. Really, which is
Chris Lattner [Mon, 8 Aug 2005 19:11:57 +0000 (19:11 +0000)]
Use the new 'moveBefore' method to simplify some code.  Really, which is
easier to understand?  :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22706 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoReject command lines that have too many positional arguments passed (e.g.,
Chris Lattner [Mon, 8 Aug 2005 17:25:38 +0000 (17:25 +0000)]
Reject command lines that have too many positional arguments passed (e.g.,
'opt x y').  This fixes PR493.

Patch contributed by Owen Anderson!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22705 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoNot all constants are legal immediates in load/store instructions.
Chris Lattner [Mon, 8 Aug 2005 06:25:50 +0000 (06:25 +0000)]
Not all constants are legal immediates in load/store instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22704 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agonew testcase, not implemented yet
Chris Lattner [Mon, 8 Aug 2005 06:23:47 +0000 (06:23 +0000)]
new testcase, not implemented yet

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22703 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoImplement LoopStrengthReduce/share_code_in_preheader.ll by having one
Chris Lattner [Mon, 8 Aug 2005 05:47:49 +0000 (05:47 +0000)]
Implement LoopStrengthReduce/share_code_in_preheader.ll by having one
rewriter for all code inserted into the preheader, which is never flushed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22702 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoIt is better to not depend on CSE to share multiplies due to IV insertion.
Chris Lattner [Mon, 8 Aug 2005 05:46:51 +0000 (05:46 +0000)]
It is better to not depend on CSE to share multiplies due to IV insertion.
This testcase checks that only one mul is present in the output code, as it
should be.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22701 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoThese are both implemented by a recent LSR patch
Chris Lattner [Mon, 8 Aug 2005 05:29:51 +0000 (05:29 +0000)]
These are both implemented by a recent LSR patch

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22700 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoImplement a simple optimization for the termination condition of the loop.
Chris Lattner [Mon, 8 Aug 2005 05:28:22 +0000 (05:28 +0000)]
Implement a simple optimization for the termination condition of the loop.
The termination condition actually wants to use the post-incremented value
of the loop, not a new indvar with an unusual base.

On PPC, for example, this allows us to compile
LoopStrengthReduce/exit_compare_live_range.ll to:

_foo:
        li r2, 0
.LBB_foo_1:     ; no_exit
        li r5, 0
        stw r5, 0(r3)
        addi r2, r2, 1
        cmpw cr0, r2, r4
        bne .LBB_foo_1  ; no_exit
        blr

instead of:

_foo:
        li r2, 1                ;; IV starts at 1, not 0
.LBB_foo_1:     ; no_exit
        li r5, 0
        stw r5, 0(r3)
        addi r5, r2, 1
        cmpw cr0, r2, r4
        or r2, r5, r5           ;; Reg-reg copy, extra live range
        bne .LBB_foo_1  ; no_exit
        blr

This implements LoopStrengthReduce/exit_compare_live_range.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22699 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoadd new helper function
Chris Lattner [Mon, 8 Aug 2005 05:21:50 +0000 (05:21 +0000)]
add new helper function

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22698 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoadd a new helper method
Chris Lattner [Mon, 8 Aug 2005 05:21:33 +0000 (05:21 +0000)]
add a new helper method

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22697 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoHandle 64-bit constant exprs on 64-bit targets.
Chris Lattner [Mon, 8 Aug 2005 04:26:32 +0000 (04:26 +0000)]
Handle 64-bit constant exprs on 64-bit targets.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22696 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoAll stats are "Number of ..."
Chris Lattner [Sun, 7 Aug 2005 20:02:04 +0000 (20:02 +0000)]
All stats are "Number of ..."

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22694 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoAdd some simple folds that occur in bitfield cases. Fix a minor bug in
Chris Lattner [Sun, 7 Aug 2005 07:03:10 +0000 (07:03 +0000)]
Add some simple folds that occur in bitfield cases.  Fix a minor bug in
isHighOnes, where it would consider 0 to have high ones.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22693 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix typoCVS: ----------------------------------------------------------------------
Chris Lattner [Sun, 7 Aug 2005 07:00:52 +0000 (07:00 +0000)]
Fix typoCVS: ----------------------------------------------------------------------

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22692 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoadd a small simplification that can be exposed after promotion/expansion
Chris Lattner [Sun, 7 Aug 2005 05:00:44 +0000 (05:00 +0000)]
add a small simplification that can be exposed after promotion/expansion

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22691 91177308-0d34-0410-b5e6-96231b3b80d8

18 years ago* Use the new PHINode::hasConstantValue method to simplify some code
Chris Lattner [Sun, 7 Aug 2005 04:27:41 +0000 (04:27 +0000)]
* Use the new PHINode::hasConstantValue method to simplify some code
* Teach this code to move allocas out of the loop when tail call eliminating
  a call marked 'tail'.  This implements TailCallElim/move_alloca_for_tail_call.ll
* Do not perform this transformation if a call is marked 'tail' and if there
  are allocas that we cannot move out of the loop in #2.  Doing so would increase
  the stack usage of the function.  This implements fixes
  PR615 and TailCallElim/dont-tce-tail-marked-call.ll.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22690 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoNew testcases for PR615
Chris Lattner [Sun, 7 Aug 2005 04:25:39 +0000 (04:25 +0000)]
New testcases for PR615

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22689 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoConsolidate the GPOpt stuff to all use the Subtarget, instead of still
Chris Lattner [Fri, 5 Aug 2005 22:05:03 +0000 (22:05 +0000)]
Consolidate the GPOpt stuff to all use the Subtarget, instead of still
depending on the command line option.  Now the command line option just
sets the subtarget as appropriate.  G5 opts will now default to on on
G5-enabled nightly testers among other machines.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22688 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoadjust to change in getSubtarget() api
Chris Lattner [Fri, 5 Aug 2005 21:54:27 +0000 (21:54 +0000)]
adjust to change in getSubtarget() api

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22687 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoSince getSubtarget() always provides a const Subtarget, dont' require the user
Chris Lattner [Fri, 5 Aug 2005 21:53:21 +0000 (21:53 +0000)]
Since getSubtarget() always provides a const Subtarget, dont' require the user
to pass it in.  Also, since it always returns a non-null pointer, make it
return a reference instead for easier use.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22686 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoEnable gp optimizations by default when available, even when a target triple
Chris Lattner [Fri, 5 Aug 2005 21:25:13 +0000 (21:25 +0000)]
Enable gp optimizations by default when available, even when a target triple
is available, since the target triple doesn't specify whether to use gpopts
or not.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22685 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoteach TestRunner about prcontext
Chris Lattner [Fri, 5 Aug 2005 19:48:29 +0000 (19:48 +0000)]
teach TestRunner about prcontext

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22683 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agotwo simple testcases loopreduce should handle but does not yet currently
Chris Lattner [Fri, 5 Aug 2005 19:47:39 +0000 (19:47 +0000)]
two simple testcases loopreduce should handle but does not yet currently

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22682 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoadd a note
Chris Lattner [Fri, 5 Aug 2005 19:18:32 +0000 (19:18 +0000)]
add a note

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22681 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoChange FindEarliestCallSeqEnd (used by libcall insertion) to use a set to
Chris Lattner [Fri, 5 Aug 2005 18:10:27 +0000 (18:10 +0000)]
Change FindEarliestCallSeqEnd (used by libcall insertion) to use a set to
avoid revisiting nodes more than once.  This eliminates a source of
potentially exponential behavior.  For a small function in 191.fma3d
(hexah_stress_divergence_), this speeds up isel from taking > 20mins to
taking 0.07s.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22680 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix a use-of-dangling-pointer bug, from the introduction of SrcValue's.
Chris Lattner [Fri, 5 Aug 2005 16:55:31 +0000 (16:55 +0000)]
Fix a use-of-dangling-pointer bug, from the introduction of SrcValue's.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22679 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix a latent bug in the libcall inserter that was exposed by Nate's patch
Chris Lattner [Fri, 5 Aug 2005 16:23:57 +0000 (16:23 +0000)]
Fix a latent bug in the libcall inserter that was exposed by Nate's patch
yesterday.  This fixes whetstone and a bunch of programs in the External tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22678 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agodon't crash when running the PPC backend on non-ppc hosts without specifying
Chris Lattner [Fri, 5 Aug 2005 16:17:22 +0000 (16:17 +0000)]
don't crash when running the PPC backend on non-ppc hosts without specifying
a subtarget.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22677 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoPHINode::hasConstantValue should never return the PHI itself, even if the
Chris Lattner [Fri, 5 Aug 2005 15:37:31 +0000 (15:37 +0000)]
PHINode::hasConstantValue should never return the PHI itself, even if the
PHI is its only operand.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22676 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix an iterator invalidation problem when we decide a phi has a constant value
Chris Lattner [Fri, 5 Aug 2005 15:34:10 +0000 (15:34 +0000)]
Fix an iterator invalidation problem when we decide a phi has a constant value

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22675 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoMake sure to clean CastedPointers after casts are potentially deleted.
Chris Lattner [Fri, 5 Aug 2005 01:30:11 +0000 (01:30 +0000)]
Make sure to clean CastedPointers after casts are potentially deleted.
This fixes LSR crashes on 301.apsi, 191.fma3d, and 189.lucas

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22673 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agonow that hasConstantValue defaults to only returning values that dominate
Chris Lattner [Fri, 5 Aug 2005 01:04:30 +0000 (01:04 +0000)]
now that hasConstantValue defaults to only returning values that dominate
the PHI node, this ugly code can vanish.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22672 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoInvoke instructions do not dominate all successors
Chris Lattner [Fri, 5 Aug 2005 01:03:27 +0000 (01:03 +0000)]
Invoke instructions do not dominate all successors

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22671 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoNow that hasConstantValue is more careful w.r.t. returning values that only
Chris Lattner [Fri, 5 Aug 2005 01:02:04 +0000 (01:02 +0000)]
Now that hasConstantValue is more careful w.r.t. returning values that only
dominate the PHI node, this code can go away.  This also makes passes more
aggressive, e.g. implementing Transforms/CondProp/phisimplify2.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22670 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoUse the bool argument to hasConstantValue to decide whether the client is
Chris Lattner [Fri, 5 Aug 2005 01:00:58 +0000 (01:00 +0000)]
Use the bool argument to hasConstantValue to decide whether the client is
prepared to deal with return values that do not dominate the PHI.  If we
cannot prove that the result dominates the PHI node, do not return it if
the client can't cope.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22669 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agonew testcase that condprop should handle. The PHI node becomes useless
Chris Lattner [Fri, 5 Aug 2005 00:59:55 +0000 (00:59 +0000)]
new testcase that condprop should handle.  The PHI node becomes useless
after threading the branch, because both operands are the same value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22668 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoThis code can handle non-dominating instructions
Chris Lattner [Fri, 5 Aug 2005 00:57:45 +0000 (00:57 +0000)]
This code can handle non-dominating instructions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22667 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoMark hasConstantValue as a const method
Chris Lattner [Fri, 5 Aug 2005 00:49:06 +0000 (00:49 +0000)]
Mark hasConstantValue as a const method

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22666 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoAdd an extra parameter that Chris requested
Nate Begeman [Thu, 4 Aug 2005 23:50:43 +0000 (23:50 +0000)]
Add an extra parameter that Chris requested

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22665 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix a fixme in CondPropagate.cpp by moving a PhiNode optimization into
Nate Begeman [Thu, 4 Aug 2005 23:24:19 +0000 (23:24 +0000)]
Fix a fixme in CondPropagate.cpp by moving a PhiNode optimization into
BasicBlock's removePredecessor routine.  This requires shuffling around
the definition and implementation of hasContantValue from Utils.h,cpp into
Instructions.h,cpp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22664 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoadd a testcase nate requested
Chris Lattner [Thu, 4 Aug 2005 22:49:32 +0000 (22:49 +0000)]
add a testcase nate requested

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22663 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoModify how immediates are removed from base expressions to deal with the fact
Chris Lattner [Thu, 4 Aug 2005 22:34:05 +0000 (22:34 +0000)]
Modify how immediates are removed from base expressions to deal with the fact
that the symbolic evaluator is not always able to use subtraction to remove
expressions.  This makes the code faster, and fixes the last crash on 178.galgel.
Finally, add a statistic to see how many phi nodes are inserted.

On 178.galgel, we get the follow stats:

2562 loop-reduce  - Number of PHIs inserted
3927 loop-reduce  - Number of GEPs strength reduced

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22662 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix a fixme in LegalizeDAG
Nate Begeman [Thu, 4 Aug 2005 21:43:28 +0000 (21:43 +0000)]
Fix a fixme in LegalizeDAG

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22661 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoHack to naturally align doubles in the constant pool. Remove this once we
Nate Begeman [Thu, 4 Aug 2005 21:04:09 +0000 (21:04 +0000)]
Hack to naturally align doubles in the constant pool.  Remove this once we
know what The Right Thing To Do is.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22660 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoUse the new subtarget support to automatically choose the correct ABI
Nate Begeman [Thu, 4 Aug 2005 20:49:48 +0000 (20:49 +0000)]
Use the new subtarget support to automatically choose the correct ABI
and asm printer for PowerPC if one is not specified.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22659 91177308-0d34-0410-b5e6-96231b3b80d8

18 years ago* Refactor some code into a new BasedUser::RewriteInstructionToUseNewBase
Chris Lattner [Thu, 4 Aug 2005 20:03:32 +0000 (20:03 +0000)]
* Refactor some code into a new BasedUser::RewriteInstructionToUseNewBase
  method.
* Fix a crash on 178.galgel, where we would insert expressions before PHI
  nodes instead of into the PHI node predecessor blocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22657 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoThis should not run lli, that is for llvm-test.
Chris Lattner [Thu, 4 Aug 2005 19:56:35 +0000 (19:56 +0000)]
This should not run lli, that is for llvm-test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22656 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoNone of these tests should require a working lli, they are codegen tests,
Chris Lattner [Thu, 4 Aug 2005 19:55:39 +0000 (19:55 +0000)]
None of these tests should require a working lli, they are codegen tests,
not execution tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22655 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoFix a case that caused this to crash on 178.galgel
Chris Lattner [Thu, 4 Aug 2005 19:26:19 +0000 (19:26 +0000)]
Fix a case that caused this to crash on 178.galgel

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22653 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoTeach LSR about loop-variant expressions, such as loops like this:
Chris Lattner [Thu, 4 Aug 2005 19:08:16 +0000 (19:08 +0000)]
Teach LSR about loop-variant expressions, such as loops like this:

  for (i = 0; i < N; ++i)
    A[i][foo()] = 0;

here we still want to strength reduce the A[i] part, even though foo() is
l-v.

This also simplifies some of the 'CanReduce' logic.

This implements Transforms/LoopStrengthReduce/ops_after_indvar.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22652 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoThis testcase now passes
Chris Lattner [Thu, 4 Aug 2005 19:08:07 +0000 (19:08 +0000)]
This testcase now passes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22651 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoRemove some more dead code.
Nate Begeman [Thu, 4 Aug 2005 18:13:56 +0000 (18:13 +0000)]
Remove some more dead code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22650 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoRefactor this code substantially with the following improvements:
Chris Lattner [Thu, 4 Aug 2005 17:40:30 +0000 (17:40 +0000)]
Refactor this code substantially with the following improvements:
  1. We only analyze instructions once, guaranteed
  2. AnalyzeGetElementPtrUsers has been ripped apart and replaced with
     something much simpler.

The next step is to handle expressions that are not all indvar+loop-invariant
values (e.g. handling indvar+loopvariant).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22649 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoNo, IDEFs shouldn't be JITed
Andrew Lenharth [Thu, 4 Aug 2005 15:32:36 +0000 (15:32 +0000)]
No, IDEFs shouldn't be JITed

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22648 91177308-0d34-0410-b5e6-96231b3b80d8

18 years ago* Unbreak release build
Misha Brukman [Thu, 4 Aug 2005 14:22:41 +0000 (14:22 +0000)]
* Unbreak release build
* Add comments to #endif pragmas for readability

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22647 91177308-0d34-0410-b5e6-96231b3b80d8

18 years ago* Unbreak optimized build (noticed by Eric van Riet Paap)
Misha Brukman [Thu, 4 Aug 2005 14:16:48 +0000 (14:16 +0000)]
* Unbreak optimized build (noticed by Eric van Riet Paap)
* Comment #endif clauses for readability

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22646 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoAdd Subtarget support to PowerPC. Next up, using it.
Nate Begeman [Thu, 4 Aug 2005 07:12:09 +0000 (07:12 +0000)]
Add Subtarget support to PowerPC.  Next up, using it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22644 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agorefactor some code
Chris Lattner [Thu, 4 Aug 2005 01:19:13 +0000 (01:19 +0000)]
refactor some code

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22643 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agothis is not implemented by lsr yet
Chris Lattner [Thu, 4 Aug 2005 01:18:48 +0000 (01:18 +0000)]
this is not implemented by lsr yet

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22642 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoinvert to if's to make the logic simpler
Chris Lattner [Thu, 4 Aug 2005 00:40:47 +0000 (00:40 +0000)]
invert to if's to make the logic simpler

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22641 91177308-0d34-0410-b5e6-96231b3b80d8

18 years agoWhen processing outer loops and we find uses of an IV in inner loops, make
Chris Lattner [Thu, 4 Aug 2005 00:14:11 +0000 (00:14 +0000)]
When processing outer loops and we find uses of an IV in inner loops, make
sure to handle the use, just don't recurse into it.

This permits us to generate this code for a simple nested loop case:

.LBB_foo_0:     ; entry
        stwu r1, -48(r1)
        stw r29, 44(r1)
        stw r30, 40(r1)
        mflr r11
        stw r11, 56(r1)
        lis r2, ha16(L_A$non_lazy_ptr)
        lwz r30, lo16(L_A$non_lazy_ptr)(r2)
        li r29, 1
.LBB_foo_1:     ; no_exit.0
        bl L_bar$stub
        li r2, 1
        or r3, r30, r30
.LBB_foo_2:     ; no_exit.1
        lfd f0, 8(r3)
        stfd f0, 0(r3)
        addi r4, r2, 1
        addi r3, r3, 8
        cmpwi cr0, r2, 100
        or r2, r4, r4
        bne .LBB_foo_2  ; no_exit.1
.LBB_foo_3:     ; loopexit.1
        addi r30, r30, 800
        addi r2, r29, 1
        cmpwi cr0, r29, 100
        or r29, r2, r2
        bne .LBB_foo_1  ; no_exit.0
.LBB_foo_4:     ; return
        lwz r11, 56(r1)
        mtlr r11
        lwz r30, 40(r1)
        lwz r29, 44(r1)
        lwz r1, 0(r1)
        blr

instead of this:

_foo:
.LBB_foo_0:     ; entry
        stwu r1, -48(r1)
        stw r28, 44(r1)                   ;; uses an extra register.
        stw r29, 40(r1)
        stw r30, 36(r1)
        mflr r11
        stw r11, 56(r1)
        li r30, 1
        li r29, 0
        or r28, r29, r29
.LBB_foo_1:     ; no_exit.0
        bl L_bar$stub
        mulli r2, r28, 800           ;; unstrength-reduced multiply
        lis r3, ha16(L_A$non_lazy_ptr)   ;; loop invariant address computation
        lwz r3, lo16(L_A$non_lazy_ptr)(r3)
        add r2, r2, r3
        mulli r4, r29, 800           ;; unstrength-reduced multiply
        addi r3, r3, 8
        add r3, r4, r3
        li r4, 1
.LBB_foo_2:     ; no_exit.1
        lfd f0, 0(r3)
        stfd f0, 0(r2)
        addi r5, r4, 1
        addi r2, r2, 8                 ;; multiple stride 8 IV's
        addi r3, r3, 8
        cmpwi cr0, r4, 100
        or r4, r5, r5
        bne .LBB_foo_2  ; no_exit.1
.LBB_foo_3:     ; loopexit.1
        addi r28, r28, 1               ;;; Many IV's with stride 1
        addi r29, r29, 1
        addi r2, r30, 1
        cmpwi cr0, r30, 100
        or r30, r2, r2
        bne .LBB_foo_1  ; no_exit.0
.LBB_foo_4:     ; return
        lwz r11, 56(r1)
        mtlr r11
        lwz r30, 36(r1)
        lwz r29, 40(r1)
        lwz r28, 44(r1)
        lwz r1, 0(r1)
        blr

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22640 91177308-0d34-0410-b5e6-96231b3b80d8