Nate Begeman
fe75a2836a
Sigh, not my day. Fix typo.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23166 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31 00:43:49 +00:00
Nate Begeman
9f52f2838d
Fix a mistake in my previous patch pointed out by sabre; the AssertZext
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case in MaskedValueIsZero was wrong.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23165 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31 00:43:08 +00:00
Nate Begeman
b85dfab889
Remove some unnecessary casts, and add the AssertZext case to
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MaskedValueIsZero.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23164 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31 00:27:53 +00:00
Chris Lattner
0fdd768094
Allow physregs to occur in the dag with multiple types. Though I don't 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. :(
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This fixes compilation of mesa
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23161 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 22:38:38 +00:00
Chris Lattner
cc0675a4be
Fix FreeBench/fourinarow with the dag isel, by not adding a bogus result
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to SHIFT_PARTS nodes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23151 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 17:21:17 +00:00
Chris Lattner
ec176e30d6
Fix a miscompile of PtrDist/bc. Sign extending bools is not the right thing,
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at least tends to expose problems elsewhere.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23149 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 16:56:19 +00:00
Nate Begeman
5ffcd9b56c
Remove a bogus piece of my AssertSext/AssertZext patch. oops.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23148 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 02:54:28 +00:00
Nate Begeman
56eb86806d
Add support for AssertSext and AssertZext, folding other extensions with
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them. This allows for elminination of redundant extends in the entry
blocks of functions on PowerPC.
Add support for i32 x i32 -> i64 multiplies, by recognizing when the inputs
to ISD::MUL in ExpandOp are actually just extended i32 values and not real
i64 values. this allows us to codegen
int mulhs(int a, int b) { return ((long long)a * b) >> 32; }
as:
_mulhs:
mulhw r3, r4, r3
blr
instead of:
_mulhs:
mulhwu r2, r4, r3
srawi r5, r3, 31
mullw r5, r4, r5
add r2, r2, r5
srawi r4, r4, 31
mullw r3, r4, r3
add r3, r2, r3
blr
with a similar improvement on x86.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23147 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 02:44:00 +00:00
Chris Lattner
f155635b53
Name this variable to be what it really is!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23145 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 01:58:51 +00:00
Chris Lattner
55334fc45c
Handle CopyToReg nodes with flag operands correctly
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23144 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 01:57:23 +00:00
Chris Lattner
82e14db9a9
Add a hack to avoid some horrible code in some cases by always emitting
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token chains first. For this C function:
int test() {
int i;
for (i = 0; i < 100000; ++i)
foo();
}
Instead of emitting this (condition before call)
.LBB_test_1: ; no_exit
addi r30, r30, 1
lis r2, 1
ori r2, r2, 34464
cmpw cr2, r30, r2
bl L_foo$stub
bne cr2, .LBB_test_1 ; no_exit
Emit this:
.LBB_test_1: ; no_exit
bl L_foo$stub
addi r30, r30, 1
lis r2, 1
ori r2, r2, 34464
cmpw cr0, r30, r2
bne cr0, .LBB_test_1 ; no_exit
Which makes it so we don't have to save/restore cr2 in the prolog/epilog of
the function.
This also makes the code much more similar to what the pattern isel produces.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23135 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-29 23:21:29 +00:00
Chris Lattner
c26aefa15a
Add a new API for Nate
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23131 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-29 21:59:31 +00:00
Andrew Lenharth
5e3efbc2ca
Some of us cared about the the promote path
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23130 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-29 20:46:51 +00:00
Chris Lattner
507f752f6e
Fix an infinite loop on x86
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23129 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-29 17:30:00 +00:00
Chris Lattner
ff01698ec0
Fix a bug in ReplaceAllUsesWith
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23122 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-28 23:59:36 +00:00
Reid Spencer
0f9beca707
Change the names of member variables per Chris' instructions, and document
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them more clearly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23118 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-27 19:09:02 +00:00
Chris Lattner
88b9c15912
Disable this code, which broke many tests last night
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23114 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-27 16:16:51 +00:00
Chris Lattner
620c93cca1
fix PHI node emission for basic blocks that have select_cc's in them on ppc32
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23113 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-27 00:58:02 +00:00
Chris Lattner
eb150d7d1f
Nate noticed that Andrew never did this. This fixes PR600
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23110 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 22:50:40 +00:00
Chris Lattner
9d3a483a38
Don't copy regs that are only used in the entry block into a vreg. This
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changes the code generated for:
short %test(short %A) {
%B = xor short %A, -32768
ret short %B
}
to:
_test:
xori r2, r3, 32768
xoris r2, r2, 65535
extsh r3, r2
blr
instead of:
_test:
rlwinm r2, r3, 0, 16, 31
xori r2, r3, 32768
xoris r2, r2, 65535
extsh r3, r2
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23109 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 22:49:59 +00:00
Chris Lattner
579cfabdad
Checking types here is not safe, because multiple types can map to the same
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register class.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23103 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 21:39:15 +00:00
Chris Lattner
025c39bf36
Call the InsertAtEndOfBasicBlock hook if the usesCustomDAGSchedInserter
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flag is set on an instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23098 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 20:54:47 +00:00
Chris Lattner
8b52f21f10
Revampt ReplaceAllUsesWith to be more efficient and easier to use.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23087 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 18:36:28 +00:00
Chris Lattner
5839bf2b3b
Change ConstantPoolSDNode to actually hold the Constant itself instead of
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putting it into the constant pool. This allows the isel machinery to
create constants that it will end up deciding are not needed, without them
ending up in the resultant function constant pool.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23081 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 17:15:30 +00:00
Chris Lattner
2bb06cdf27
Fix a huge annoyance: SelectNodeTo took types before the opcode unlike
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every other SD API. Fix it to take the opcode before the types.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23079 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 16:36:26 +00:00
Chris Lattner
d7050a9c50
the 5th operand is the 4th number
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23074 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 00:43:46 +00:00
Chris Lattner
23004e5f21
Add support for targets that want to custom expand select_cc in some cases.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23071 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 00:23:59 +00:00
Chris Lattner
07dffd6af6
Allow LowerOperation to return a null SDOperand in case it wants to lower
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some things given to it, but not all.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23070 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 00:14:16 +00:00
Chris Lattner
f07d023dd9
Fix a nasty bug from a previous patch of mine
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23069 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 00:13:12 +00:00
Nate Begeman
1999b4b974
New fold for SELECT_CC
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23058 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 20:04:38 +00:00
Chris Lattner
43247a157b
Don't auto-cse nodes that return flags
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23055 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 19:12:10 +00:00
Chris Lattner
9d338cf3a3
simplify the code a bit using isOperationLegal
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23053 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 17:54:58 +00:00
Chris Lattner
376d54f9b6
Add support for flag operands
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23050 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 17:48:54 +00:00
Chris Lattner
4025a9c2cc
ADd support for TargetConstantPool nodes
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23041 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 05:03:06 +00:00
Chris Lattner
afb2dd43de
add a new TargetFrameIndex node
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23035 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 00:43:01 +00:00
Chris Lattner
7651fa4a7e
add a method
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23027 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 23:00:29 +00:00
Chris Lattner
7b2880c4cd
Add ReplaceAllUsesWith that can take a vector of replacement values.
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Add some foldings to hopefully help the illegal setcc issue, and move some code around.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23025 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 22:44:39 +00:00
Chris Lattner
14b392af1d
Add support for external symbols, and support for variable arity instructions
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23022 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 22:02:41 +00:00
Chris Lattner
e39db07713
Fix pasto that prevented VT ndoes from showing up in -view-isel-dags correctly
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23021 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 18:30:00 +00:00
Chris Lattner
1d6373c1af
teach selection dag mask tracking about the fact that select_cc operates like
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select. Also teach it that the bit count instructions can only set the low bits
of the result, depending on the size of the input.
This allows us to compile this:
int %eq0(int %a) {
%tmp.1 = seteq int %a, 0 ; <bool> [#uses=1]
%tmp.2 = cast bool %tmp.1 to int ; <int> [#uses=1]
ret int %tmp.2
}
To this:
_eq0:
cntlzw r2, r3
srwi r3, r2, 5
blr
instead of this:
_eq0:
cntlzw r2, r3
rlwinm r3, r2, 27, 31, 31
blr
when setcc is marked illegal on ppc (which restores parity to non-illegal
setcc). Thanks to Nate for pointing this out.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23013 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 16:46:55 +00:00
Chris Lattner
c9c60f6429
Start using isOperationLegal and isTypeLegal to simplify the code
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23012 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 16:35:28 +00:00
Chris Lattner
9ed62c16f2
Adjust to new interface
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23010 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 16:34:12 +00:00
Nate Begeman
cebd433d8d
Teach SelectionDAG how to simplify a few more setcc-equivalent select_cc
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nodes so that backends don't have to.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22999 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 04:57:57 +00:00
Chris Lattner
82cfa5d616
Make -view-isel-dags show the dag before instruction selecting, in case
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the target isel crashes due to unimplemented features like calls :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22997 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 00:34:29 +00:00
Nate Begeman
0750a40a4f
Fix optimization of select_cc seteq X, 0, 1, 0 -> srl (ctlz X), log2 X size
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22995 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 00:21:28 +00:00
Nate Begeman
7042f15bde
Teach the SelectionDAG how to transform select_cc eq, X, 0, 1, 0 into
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either seteq X, 0 or srl (ctlz X), size(X-1), depending on what's legal
for the target.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22978 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-23 05:41:12 +00:00
Nate Begeman
b942a3dd5f
Teach Legalize how to turn setcc into select_cc
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22977 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-23 04:29:48 +00:00
Chris Lattner
8f03405ee5
Fix a problem where constant expr shifts would not have their shift amount
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promoted to the right type. This fixes: IA64/2005-08-22-LegalizerCrash.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22969 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-22 17:28:31 +00:00
Chris Lattner
23553cfb4a
Add a fast-path for register values. Add support for constant pool entries,
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allowing us to compile this:
float %test2(float* %P) {
%Q = load float* %P
%R = add float %Q, 10.1
ret float %R
}
to this:
_test2:
lfs r2, 0(r3)
lis r3, ha16(.CPI_test2_0)
lfs r3, lo16(.CPI_test2_0)(r3)
fadds f1, r2, r3
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22962 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-22 01:04:32 +00:00
Chris Lattner
c975e1dedc
add anew method
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22957 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-21 22:30:30 +00:00