Chris Lattner [Thu, 18 Aug 2005 18:45:24 +0000 (18:45 +0000)]
new file, obviously just a stub
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22868
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Thu, 18 Aug 2005 18:44:33 +0000 (18:44 +0000)]
add a method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22867
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Thu, 18 Aug 2005 18:34:00 +0000 (18:34 +0000)]
remove some unused stuff
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22866
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Thu, 18 Aug 2005 18:14:49 +0000 (18:14 +0000)]
Fix int foo() { return 65535; } by using the top 16 bits of the constant
as the argument to LIS rather than the result of HA16(constant).
The DAG->DAG ISel was already doing the right thing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22865
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Thu, 18 Aug 2005 18:01:39 +0000 (18:01 +0000)]
Improve ISD::Constant codegen.
Now for int foo() { return -1; } we generate:
_foo:
li r3, -1
blr
instead of
_foo:
lis r2, -1
ori r3, r2, 65535
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22864
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Thu, 18 Aug 2005 17:35:14 +0000 (17:35 +0000)]
Enable critical edge splitting by default
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22863
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Thu, 18 Aug 2005 17:16:52 +0000 (17:16 +0000)]
replace switch stmt with an assert, generate li 0 instead of lis 0 for 0,
to make the code follow people's expectations better.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22861
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Thu, 18 Aug 2005 15:52:30 +0000 (15:52 +0000)]
Handle loading of 0x????0000 constants with a single instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22858
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Thu, 18 Aug 2005 07:30:46 +0000 (07:30 +0000)]
Add support for ISD::AND, and its various optimized forms.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22857
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Thu, 18 Aug 2005 07:30:15 +0000 (07:30 +0000)]
Add support for target DAG nodes that take 4 operands, such as PowerPC's
rlwinm.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22856
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Thu, 18 Aug 2005 05:44:50 +0000 (05:44 +0000)]
Maintain consistency in negating things
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22855
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Thu, 18 Aug 2005 05:00:13 +0000 (05:00 +0000)]
Implement XOR, remove a broken sign_extend_inreg case
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22854
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Thu, 18 Aug 2005 03:31:02 +0000 (03:31 +0000)]
Fix printing of VTSDNodes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22853
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Thu, 18 Aug 2005 03:11:44 +0000 (03:11 +0000)]
Add a testcase for load short -> uint, which is currently emitted as a
zextload + sign_extend_inreg rather than a sextload.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22852
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Thu, 18 Aug 2005 03:04:18 +0000 (03:04 +0000)]
Add a bunch more simple nodes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22851
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Thu, 18 Aug 2005 00:53:47 +0000 (00:53 +0000)]
Add a couple more nodes that are easy to handle
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22850
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Thu, 18 Aug 2005 00:21:41 +0000 (00:21 +0000)]
Be fruitful and multiply!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22849
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Thu, 18 Aug 2005 00:15:15 +0000 (00:15 +0000)]
Better version of isIntImmediate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22848
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 23:57:24 +0000 (23:57 +0000)]
messed up
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22847
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 23:54:12 +0000 (23:54 +0000)]
include/llvm/Support/MathExtras.h
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22846
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Wed, 17 Aug 2005 23:46:35 +0000 (23:46 +0000)]
Teach the DAG->DAG ISel about FNEG, and how it can be used to invert
several of the PowerPC opcodes that come in both negated and non-negated
forms.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22845
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Wed, 17 Aug 2005 23:44:54 +0000 (23:44 +0000)]
Add two new methods isTargetOpcode() which returns true if the node type
is greater than the range of building selection dag node types, and
getTargetOpcode(), which returns the node opcode less the value of
isd::builtin_op_end, which specifies the end of the builtin types.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22844
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 21:22:41 +0000 (21:22 +0000)]
Fix Transforms/LoopStrengthReduce/2005-08-17-OutOfLoopVariant.ll, a crash
on 177.mesa
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22843
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 21:21:47 +0000 (21:21 +0000)]
new testcase distilled from mesa
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22842
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 20:08:02 +0000 (20:08 +0000)]
Move the code dependency for MathExtras.h from SelectionDAGNodes.h.
Added some class dividers in SelectionDAG.cpp.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22841
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 20:06:22 +0000 (20:06 +0000)]
Move code dependency for MathExtras.h out of Constants.h.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22840
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 20:04:34 +0000 (20:04 +0000)]
Promote dependency for MathExtras.h out of Constants.h.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22839
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 19:34:49 +0000 (19:34 +0000)]
Culling out use of unions for converting FP to bits and vice versa.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22838
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 19:33:30 +0000 (19:33 +0000)]
add a beta option for turning on dag->dag isel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22837
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 19:33:03 +0000 (19:33 +0000)]
initial hack at a dag->dag instruction selector. This is obviously woefully
incomplete, but it is a start. It handles basic argument/retval stuff, immediates,
add and sub.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22836
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 19:32:03 +0000 (19:32 +0000)]
add prototype, remove dead proto
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22835
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 19:00:20 +0000 (19:00 +0000)]
Fix a bug in RemoveDeadNodes where it would crash when its "optional"
argument is not specified.
Implement ReplaceAllUsesWith.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22834
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 18:59:17 +0000 (18:59 +0000)]
add ReplaceAllUsesWith, and a helper to implemented it
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22833
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 18:58:38 +0000 (18:58 +0000)]
Make removeUser more efficient, add a matching addUser.
Fix the setOperands methods I added to update use/def information correctly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22832
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 17:42:52 +0000 (17:42 +0000)]
Switched to using BitsToDouble for int_to_float to avoid aliasing problem.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22831
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 17:27:47 +0000 (17:27 +0000)]
Added support for converting raw bits to FP, and FP to raw bits. The intent
is to avoid the distraction of the union declarations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22830
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 17:08:24 +0000 (17:08 +0000)]
Fix some bugs in the alpha backend, some of which I introduced yesterday,
and some that were preexisting. All alpha regtests pass now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22829
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 09:44:59 +0000 (09:44 +0000)]
Change hex float constants for the sake of VC++.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22828
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 06:46:50 +0000 (06:46 +0000)]
This was moved to the .cpp file
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22827
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 06:37:43 +0000 (06:37 +0000)]
Add a new beta option for critical edge splitting, to avoid a problem that
Nate noticed in yacr2 (and I know occurs in other places as well).
This is still rough, as the critical edge blocks are not intelligently placed
but is added to get some idea to see if this improves performance.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22825
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 06:35:16 +0000 (06:35 +0000)]
Use a new helper to split critical edges, making the code simpler.
Do not claim to not change the CFG. We do change the cfg to split critical
edges. This isn't causing us a problem now, but could likely do so in the
future.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22824
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 06:34:37 +0000 (06:34 +0000)]
add a helper
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22823
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 06:06:25 +0000 (06:06 +0000)]
Fix a regression on X86, where FP values can be promoted too.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22822
91177308-0d34-0410-b5e6-
96231b3b80d8
Misha Brukman [Wed, 17 Aug 2005 02:38:56 +0000 (02:38 +0000)]
Fix grammar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22821
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 01:54:00 +0000 (01:54 +0000)]
make sure to remove a node from the use list of its operands when we replace
it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22820
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 01:25:14 +0000 (01:25 +0000)]
Fix a few small typos I noticed when converting this over to the DAG->DAG
selector. Also, there is no difference between addSImm and addImm, so just
use addImm, folding some branches.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22819
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 01:14:38 +0000 (01:14 +0000)]
Removed UINT_TO_FP and SINT_TO_FP from ISel outright.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22818
91177308-0d34-0410-b5e6-
96231b3b80d8
Andrew Lenharth [Wed, 17 Aug 2005 00:47:24 +0000 (00:47 +0000)]
thinko. Should fix s4addl.ll regression
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22817
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 00:41:40 +0000 (00:41 +0000)]
Remove ISel code generation for UINT_TO_FP and SINT_TO_FP. Now asserts if
marked as legal.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22816
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 00:40:22 +0000 (00:40 +0000)]
Make UINT_TO_FP and SINT_TO_FP use generic expansion.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22815
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Wed, 17 Aug 2005 00:39:29 +0000 (00:39 +0000)]
Added generic code expansion for [signed|unsigned] i32 to [f32|f64] casts in the
legalizer. PowerPC now uses this expansion instead of ISel version.
Example:
// signed integer to double conversion
double f1(signed x) {
return (double)x;
}
// unsigned integer to double conversion
double f2(unsigned x) {
return (double)x;
}
// signed integer to float conversion
float f3(signed x) {
return (float)x;
}
// unsigned integer to float conversion
float f4(unsigned x) {
return (float)x;
}
Byte Code:
internal fastcc double %_Z2f1i(int %x) {
entry:
%tmp.1 = cast int %x to double ; <double> [#uses=1]
ret double %tmp.1
}
internal fastcc double %_Z2f2j(uint %x) {
entry:
%tmp.1 = cast uint %x to double ; <double> [#uses=1]
ret double %tmp.1
}
internal fastcc float %_Z2f3i(int %x) {
entry:
%tmp.1 = cast int %x to float ; <float> [#uses=1]
ret float %tmp.1
}
internal fastcc float %_Z2f4j(uint %x) {
entry:
%tmp.1 = cast uint %x to float ; <float> [#uses=1]
ret float %tmp.1
}
internal fastcc double %_Z2g1i(int %x) {
entry:
%buffer = alloca [2 x uint] ; <[2 x uint]*> [#uses=3]
%tmp.0 = getelementptr [2 x uint]* %buffer, int 0, int 0 ; <uint*> [#uses=1]
store uint
1127219200, uint* %tmp.0
%tmp.2 = cast int %x to uint ; <uint> [#uses=1]
%tmp.3 = xor uint %tmp.2,
2147483648 ; <uint> [#uses=1]
%tmp.5 = getelementptr [2 x uint]* %buffer, int 0, int 1 ; <uint*> [#uses=1]
store uint %tmp.3, uint* %tmp.5
%tmp.9 = cast [2 x uint]* %buffer to double* ; <double*> [#uses=1]
%tmp.10 = load double* %tmp.9 ; <double> [#uses=1]
%tmp.13 = load double* cast (long* %signed_bias to double*) ; <double> [#uses=1]
%tmp.14 = sub double %tmp.10, %tmp.13 ; <double> [#uses=1]
ret double %tmp.14
}
internal fastcc double %_Z2g2j(uint %x) {
entry:
%buffer = alloca [2 x uint] ; <[2 x uint]*> [#uses=3]
%tmp.0 = getelementptr [2 x uint]* %buffer, int 0, int 0 ; <uint*> [#uses=1]
store uint
1127219200, uint* %tmp.0
%tmp.1 = getelementptr [2 x uint]* %buffer, int 0, int 1 ; <uint*> [#uses=1]
store uint %x, uint* %tmp.1
%tmp.4 = cast [2 x uint]* %buffer to double* ; <double*> [#uses=1]
%tmp.5 = load double* %tmp.4 ; <double> [#uses=1]
%tmp.8 = load double* cast (long* %unsigned_bias to double*) ; <double> [#uses=1]
%tmp.9 = sub double %tmp.5, %tmp.8 ; <double> [#uses=1]
ret double %tmp.9
}
internal fastcc float %_Z2g3i(int %x) {
entry:
%buffer = alloca [2 x uint] ; <[2 x uint]*> [#uses=3]
%tmp.0 = getelementptr [2 x uint]* %buffer, int 0, int 0 ; <uint*> [#uses=1]
store uint
1127219200, uint* %tmp.0
%tmp.2 = cast int %x to uint ; <uint> [#uses=1]
%tmp.3 = xor uint %tmp.2,
2147483648 ; <uint> [#uses=1]
%tmp.5 = getelementptr [2 x uint]* %buffer, int 0, int 1 ; <uint*> [#uses=1]
store uint %tmp.3, uint* %tmp.5
%tmp.9 = cast [2 x uint]* %buffer to double* ; <double*> [#uses=1]
%tmp.10 = load double* %tmp.9 ; <double> [#uses=1]
%tmp.13 = load double* cast (long* %signed_bias to double*) ; <double> [#uses=1]
%tmp.14 = sub double %tmp.10, %tmp.13 ; <double> [#uses=1]
%tmp.16 = cast double %tmp.14 to float ; <float> [#uses=1]
ret float %tmp.16
}
internal fastcc float %_Z2g4j(uint %x) {
entry:
%buffer = alloca [2 x uint] ; <[2 x uint]*> [#uses=3]
%tmp.0 = getelementptr [2 x uint]* %buffer, int 0, int 0 ; <uint*> [#uses=1]
store uint
1127219200, uint* %tmp.0
%tmp.1 = getelementptr [2 x uint]* %buffer, int 0, int 1 ; <uint*> [#uses=1]
store uint %x, uint* %tmp.1
%tmp.4 = cast [2 x uint]* %buffer to double* ; <double*> [#uses=1]
%tmp.5 = load double* %tmp.4 ; <double> [#uses=1]
%tmp.8 = load double* cast (long* %unsigned_bias to double*) ; <double> [#uses=1]
%tmp.9 = sub double %tmp.5, %tmp.8 ; <double> [#uses=1]
%tmp.11 = cast double %tmp.9 to float ; <float> [#uses=1]
ret float %tmp.11
}
PowerPC Code:
.machine ppc970
.const
.align 2
.CPIl1__Z2f1i_0: ; float 0x4330000080000000
.long
1501560836 ; float 4.5036e+15
.text
.align 2
.globl l1__Z2f1i
l1__Z2f1i:
.LBBl1__Z2f1i_0: ; entry
xoris r2, r3, 32768
stw r2, -4(r1)
lis r2, 17200
stw r2, -8(r1)
lfd f0, -8(r1)
lis r2, ha16(.CPIl1__Z2f1i_0)
lfs f1, lo16(.CPIl1__Z2f1i_0)(r2)
fsub f1, f0, f1
blr
.const
.align 2
.CPIl2__Z2f2j_0: ; float 0x4330000000000000
.long
1501560832 ; float 4.5036e+15
.text
.align 2
.globl l2__Z2f2j
l2__Z2f2j:
.LBBl2__Z2f2j_0: ; entry
stw r3, -4(r1)
lis r2, 17200
stw r2, -8(r1)
lfd f0, -8(r1)
lis r2, ha16(.CPIl2__Z2f2j_0)
lfs f1, lo16(.CPIl2__Z2f2j_0)(r2)
fsub f1, f0, f1
blr
.const
.align 2
.CPIl3__Z2f3i_0: ; float 0x4330000080000000
.long
1501560836 ; float 4.5036e+15
.text
.align 2
.globl l3__Z2f3i
l3__Z2f3i:
.LBBl3__Z2f3i_0: ; entry
xoris r2, r3, 32768
stw r2, -4(r1)
lis r2, 17200
stw r2, -8(r1)
lfd f0, -8(r1)
lis r2, ha16(.CPIl3__Z2f3i_0)
lfs f1, lo16(.CPIl3__Z2f3i_0)(r2)
fsub f0, f0, f1
frsp f1, f0
blr
.const
.align 2
.CPIl4__Z2f4j_0: ; float 0x4330000000000000
.long
1501560832 ; float 4.5036e+15
.text
.align 2
.globl l4__Z2f4j
l4__Z2f4j:
.LBBl4__Z2f4j_0: ; entry
stw r3, -4(r1)
lis r2, 17200
stw r2, -8(r1)
lfd f0, -8(r1)
lis r2, ha16(.CPIl4__Z2f4j_0)
lfs f1, lo16(.CPIl4__Z2f4j_0)(r2)
fsub f0, f0, f1
frsp f1, f0
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22814
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 00:34:06 +0000 (00:34 +0000)]
add a new TargetConstant node
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22813
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Wed, 17 Aug 2005 00:33:30 +0000 (00:33 +0000)]
add some helper methods, and a new TargetConstant node, which is not
subjected to folding.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22812
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Wed, 17 Aug 2005 00:20:08 +0000 (00:20 +0000)]
Implement a couple improvements:
Remove dead code in ISD::Constant handling
Add support for add long, imm16
We now codegen 'long long foo(long long a) { return ++a; }'
as:
addic r4, r4, 1
addze r3, r3
blr
instead of:
li r2, 1
li r5, 0
addc r2, r4, r2
adde r3, r3, r5
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22811
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 22:04:58 +0000 (22:04 +0000)]
remove a dead enum value, making a comment above correct again
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22810
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 21:59:52 +0000 (21:59 +0000)]
This is a dummy, it doesn't matter what the ValueType is
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22809
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 21:58:15 +0000 (21:58 +0000)]
updates for changes in nodes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22808
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 21:56:37 +0000 (21:56 +0000)]
update the backends to work with the new CopyFromReg/CopyToReg/ImplicitDef nodes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22807
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 21:55:35 +0000 (21:55 +0000)]
Eliminate the RegSDNode class, which 3 nodes (CopyFromReg/CopyToReg/ImplicitDef)
used to tack a register number onto the node.
Instead of doing this, make a new node, RegisterSDNode, which is a leaf
containing a register number. These three operations just become normal
DAG nodes now, instead of requiring special handling.
Note that with this change, it is no longer correct to make illegal
CopyFromReg/CopyToReg nodes. The legalizer will not touch them, and this
is bad, so don't do it. :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22806
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Tue, 16 Aug 2005 19:49:35 +0000 (19:49 +0000)]
Implement BR_CC and BRTWOWAY_CC. This allows the removal of a rather nasty
fixme from the PowerPC backend. Emit slightly better code for legalizing
select_cc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22805
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 18:33:07 +0000 (18:33 +0000)]
Allow passing a dag into dump and getOperationName. If one is available
when printing a node, use it to render target operations with their
target instruction name instead of "<<unknown>>".
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22804
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 18:32:18 +0000 (18:32 +0000)]
allow passing a dag into getOperationName and dump
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22803
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 18:31:23 +0000 (18:31 +0000)]
Use a extant helper to do this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22802
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 18:17:10 +0000 (18:17 +0000)]
Add some methods for dag->dag isel.
Split RemoveNodeFromCSEMaps out of DeleteNodesIfDead to do it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22801
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 18:16:24 +0000 (18:16 +0000)]
add some methods for dag->dag isel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22800
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 17:14:42 +0000 (17:14 +0000)]
Pull the LLVM -> DAG lowering code out of the pattern selector so that it
can be shared with the DAG->DAG selector.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22799
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 00:38:11 +0000 (00:38 +0000)]
Fix a bad case in gzip where we put lots of things in registers across the
loop, because a IV-dependent value was used outside of the loop and didn't
have immediate-folding capability
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22798
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 00:37:01 +0000 (00:37 +0000)]
Fix Transforms/LoopStrengthReduce/2005-08-15-AddRecIV.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22797
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Tue, 16 Aug 2005 00:36:12 +0000 (00:36 +0000)]
testcase that crashes lsr, distilled from 175.vpr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22796
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Mon, 15 Aug 2005 23:47:04 +0000 (23:47 +0000)]
Turn loop strength reduction on by default.
Only run createLowerConstantExpressionsPass for the simple isel. The DAG
isel has no need for it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22794
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Mon, 15 Aug 2005 23:33:51 +0000 (23:33 +0000)]
Teach LLVM to know how many times a loop executes when constructed with
a < expression, e.g.: for (i = m; i < n; ++i)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22793
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Mon, 15 Aug 2005 17:35:26 +0000 (17:35 +0000)]
Broke 80 column rule.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22792
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Mon, 15 Aug 2005 17:14:19 +0000 (17:14 +0000)]
Changed code gen for int to f32 to use rounding. This makes FP results
consistent with gcc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22791
91177308-0d34-0410-b5e6-
96231b3b80d8
Andrew Lenharth [Mon, 15 Aug 2005 14:31:37 +0000 (14:31 +0000)]
isIntImmediate is a good Idea. Add a flavor that checks bounds while it is at it
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22790
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Sun, 14 Aug 2005 18:38:32 +0000 (18:38 +0000)]
Fix last night's PPC32 regressions by
1. Not selecting the false value of a select_cc in the false arm, which
isn't legal for nested selects.
2. Actually returning the node we created and Legalized in the FP_TO_UINT
Expander.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22789
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Sun, 14 Aug 2005 18:37:02 +0000 (18:37 +0000)]
Fix last night's X86 regressions by putting code for SSE in the if(SSE)
block. nur.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22788
91177308-0d34-0410-b5e6-
96231b3b80d8
Andrew Lenharth [Sun, 14 Aug 2005 15:14:34 +0000 (15:14 +0000)]
only build .a on alpha
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22787
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Sun, 14 Aug 2005 04:36:51 +0000 (04:36 +0000)]
Fix FP_TO_UINT with Scalar SSE2 now that the legalizer can handle it. We
now generate the relatively good code sequences:
unsigned short foo(float a) { return a; }
_foo:
movss 4(%esp), %xmm0
cvttss2si %xmm0, %eax
movzwl %ax, %eax
ret
and
unsigned bar(float a) { return a; }
_bar:
movss .CPI_bar_0, %xmm0
movss 4(%esp), %xmm1
movapd %xmm1, %xmm2
subss %xmm0, %xmm2
cvttss2si %xmm2, %eax
xorl $-
2147483648, %eax
cvttss2si %xmm1, %ecx
ucomiss %xmm0, %xmm1
cmovb %ecx, %eax
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22786
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Sun, 14 Aug 2005 01:20:53 +0000 (01:20 +0000)]
Teach the legalizer how to legalize FP_TO_UINT.
Teach the legalizer to promote FP_TO_UINT to FP_TO_SINT if the wider
FP_TO_UINT is also illegal. This allows us on PPC to codegen
unsigned short foo(float a) { return a; }
as:
_foo:
.LBB_foo_0: ; entry
fctiwz f0, f1
stfd f0, -8(r1)
lwz r2, -4(r1)
rlwinm r3, r2, 0, 16, 31
blr
instead of:
_foo:
.LBB_foo_0: ; entry
fctiwz f0, f1
stfd f0, -8(r1)
lwz r2, -4(r1)
lis r3, ha16(.CPI_foo_0)
lfs f0, lo16(.CPI_foo_0)(r3)
fcmpu cr0, f1, f0
blt .LBB_foo_2 ; entry
.LBB_foo_1: ; entry
fsubs f0, f1, f0
fctiwz f0, f0
stfd f0, -16(r1)
lwz r2, -12(r1)
xoris r2, r2, 32768
.LBB_foo_2: ; entry
rlwinm r3, r2, 0, 16, 31
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22785
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Sun, 14 Aug 2005 01:17:16 +0000 (01:17 +0000)]
Make FP_TO_UINT Illegal. This allows us to generate significantly better
codegen for FP_TO_UINT by using the legalizer's SELECT variant.
Implement a codegen improvement for SELECT_CC, selecting the false node in
the MBB that feeds the phi node. This allows us to codegen:
void foo(int *a, int b, int c) { int d = (a < b) ? 5 : 9; *a = d; }
as:
_foo:
li r2, 5
cmpw cr0, r4, r3
bgt .LBB_foo_2 ; entry
.LBB_foo_1: ; entry
li r2, 9
.LBB_foo_2: ; entry
stw r2, 0(r3)
blr
insted of:
_foo:
li r2, 5
li r5, 9
cmpw cr0, r4, r3
bgt .LBB_foo_2 ; entry
.LBB_foo_1: ; entry
or r2, r5, r5
.LBB_foo_2: ; entry
stw r2, 0(r3)
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22784
91177308-0d34-0410-b5e6-
96231b3b80d8
Andrew Lenharth [Sat, 13 Aug 2005 14:58:23 +0000 (14:58 +0000)]
Testing a variable before it is defined doesn't work so well. It is a fairly small thing, so just let everyone build the .a file
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22783
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Sat, 13 Aug 2005 07:42:01 +0000 (07:42 +0000)]
Ooops, don't forget to clear this. The real inner loop is now:
.LBB_foo_3: ; no_exit.1
lfd f2, 0(r9)
lfd f3, 8(r9)
fmul f4, f1, f2
fmadd f4, f0, f3, f4
stfd f4, 8(r9)
fmul f3, f1, f3
fmsub f2, f0, f2, f3
stfd f2, 0(r9)
addi r9, r9, 16
addi r8, r8, 1
cmpw cr0, r8, r4
ble .LBB_foo_3 ; no_exit.1
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22782
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Sat, 13 Aug 2005 07:27:18 +0000 (07:27 +0000)]
Recursively scan scev expressions for common subexpressions. This allows us
to handle nested loops much better, for example, by being able to tell that
these two expressions:
{( 8 + ( 16 * ( 1 + %Tmp11 + %Tmp12)) + %c_),+,( 16 * %Tmp 12)}<loopentry.1>
{(( 16 * ( 1 + %Tmp11 + %Tmp12)) + %c_),+,( 16 * %Tmp12)}<loopentry.1>
Have the following common part that can be shared:
{(( 16 * ( 1 + %Tmp11 + %Tmp12)) + %c_),+,( 16 * %Tmp12)}<loopentry.1>
This allows us to codegen an important inner loop in 168.wupwise as:
.LBB_foo_4: ; no_exit.1
lfd f2, 16(r9)
fmul f3, f0, f2
fmul f2, f1, f2
fadd f4, f3, f2
stfd f4, 8(r9)
fsub f2, f3, f2
stfd f2, 16(r9)
addi r8, r8, 1
addi r9, r9, 16
cmpw cr0, r8, r4
ble .LBB_foo_4 ; no_exit.1
instead of:
.LBB_foo_3: ; no_exit.1
lfdx f2, r6, r9
add r10, r6, r9
lfd f3, 8(r10)
fmul f4, f1, f2
fmadd f4, f0, f3, f4
stfd f4, 8(r10)
fmul f3, f1, f3
fmsub f2, f0, f2, f3
stfdx f2, r6, r9
addi r9, r9, 16
addi r8, r8, 1
cmpw cr0, r8, r4
ble .LBB_foo_3 ; no_exit.1
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22781
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Sat, 13 Aug 2005 06:14:17 +0000 (06:14 +0000)]
Remove an unncessary argument to SimplifySelectCC and add an additional
assert when creating a select_cc node.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22780
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Sat, 13 Aug 2005 06:00:21 +0000 (06:00 +0000)]
Fix the fabs regression on x86 by abstracting the select_cc optimization
out into SimplifySelectCC. This allows both ISD::SELECT and ISD::SELECT_CC
to use the same set of simplifying folds.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22779
91177308-0d34-0410-b5e6-
96231b3b80d8
Nate Begeman [Sat, 13 Aug 2005 05:59:16 +0000 (05:59 +0000)]
Remove support for 64b PPC, it's been broken for a long time. It'll be
back once a DAG->DAG ISel exists.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22778
91177308-0d34-0410-b5e6-
96231b3b80d8
Andrew Lenharth [Sat, 13 Aug 2005 05:09:50 +0000 (05:09 +0000)]
Fix oversized GOT problem with gcc-4 on alpha
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22777
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Sat, 13 Aug 2005 01:38:43 +0000 (01:38 +0000)]
Teach SplitCriticalEdge to update LoopInfo if it is alive. This fixes
a problem in LoopStrengthReduction, where it would split critical edges
then confused itself with outdated loop information.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22776
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Sat, 13 Aug 2005 01:30:36 +0000 (01:30 +0000)]
remove dead code. The exit block list is computed on demand, thus does not
need to be updated. This code is a relic from when it did.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22775
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Fri, 12 Aug 2005 23:54:58 +0000 (23:54 +0000)]
implement a couple of simple shift foldings.
e.g. (X & 7) >> 3 -> 0
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22774
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Fri, 12 Aug 2005 23:52:46 +0000 (23:52 +0000)]
Fix for 2005-08-12-rlwimi-crash.ll. Make allowance for masks being shifted to
zero.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22773
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Fri, 12 Aug 2005 23:40:14 +0000 (23:40 +0000)]
Added test cases to guarantee use of ORC and ANDC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22772
91177308-0d34-0410-b5e6-
96231b3b80d8
Jim Laskey [Fri, 12 Aug 2005 23:38:02 +0000 (23:38 +0000)]
1. This changes handles the cases of (~x)&y and x&(~y) yielding ANDC, and
(~x)|y and x|(~y) yielding ORC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22771
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Fri, 12 Aug 2005 23:34:03 +0000 (23:34 +0000)]
testcase that crashed the ppc backend, distilled from crafty
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22770
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Fri, 12 Aug 2005 22:22:17 +0000 (22:22 +0000)]
When splitting critical edges, make sure not to leave the new block in the
middle of the loop. This turns a critical loop in gzip into this:
.LBB_test_1: ; loopentry
or r27, r28, r28
add r28, r3, r27
lhz r28, 3(r28)
add r26, r4, r27
lhz r26, 3(r26)
cmpw cr0, r28, r26
bne .LBB_test_8 ; loopentry.loopexit_crit_edge
.LBB_test_2: ; shortcirc_next.0
add r28, r3, r27
lhz r28, 5(r28)
add r26, r4, r27
lhz r26, 5(r26)
cmpw cr0, r28, r26
bne .LBB_test_7 ; shortcirc_next.0.loopexit_crit_edge
.LBB_test_3: ; shortcirc_next.1
add r28, r3, r27
lhz r28, 7(r28)
add r26, r4, r27
lhz r26, 7(r26)
cmpw cr0, r28, r26
bne .LBB_test_6 ; shortcirc_next.1.loopexit_crit_edge
.LBB_test_4: ; shortcirc_next.2
add r28, r3, r27
lhz r26, 9(r28)
add r28, r4, r27
lhz r25, 9(r28)
addi r28, r27, 8
cmpw cr7, r26, r25
mfcr r26, 1
rlwinm r26, r26, 31, 31, 31
add r25, r8, r27
cmpw cr7, r25, r7
mfcr r25, 1
rlwinm r25, r25, 29, 31, 31
and. r26, r26, r25
bne .LBB_test_1 ; loopentry
instead of this:
.LBB_test_1: ; loopentry
or r27, r28, r28
add r28, r3, r27
lhz r28, 3(r28)
add r26, r4, r27
lhz r26, 3(r26)
cmpw cr0, r28, r26
beq .LBB_test_3 ; shortcirc_next.0
.LBB_test_2: ; loopentry.loopexit_crit_edge
add r2, r30, r27
add r8, r29, r27
b .LBB_test_9 ; loopexit
.LBB_test_3: ; shortcirc_next.0
add r28, r3, r27
lhz r28, 5(r28)
add r26, r4, r27
lhz r26, 5(r26)
cmpw cr0, r28, r26
beq .LBB_test_5 ; shortcirc_next.1
.LBB_test_4: ; shortcirc_next.0.loopexit_crit_edge
add r2, r11, r27
add r8, r12, r27
b .LBB_test_9 ; loopexit
.LBB_test_5: ; shortcirc_next.1
add r28, r3, r27
lhz r28, 7(r28)
add r26, r4, r27
lhz r26, 7(r26)
cmpw cr0, r28, r26
beq .LBB_test_7 ; shortcirc_next.2
.LBB_test_6: ; shortcirc_next.1.loopexit_crit_edge
add r2, r9, r27
add r8, r10, r27
b .LBB_test_9 ; loopexit
.LBB_test_7: ; shortcirc_next.2
add r28, r3, r27
lhz r26, 9(r28)
add r28, r4, r27
lhz r25, 9(r28)
addi r28, r27, 8
cmpw cr7, r26, r25
mfcr r26, 1
rlwinm r26, r26, 31, 31, 31
add r25, r8, r27
cmpw cr7, r25, r7
mfcr r25, 1
rlwinm r25, r25, 29, 31, 31
and. r26, r26, r25
bne .LBB_test_1 ; loopentry
Next up, improve the code for the loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22769
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Fri, 12 Aug 2005 22:14:06 +0000 (22:14 +0000)]
Add a helper method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22768
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Fri, 12 Aug 2005 22:13:27 +0000 (22:13 +0000)]
add a helper method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22767
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Fri, 12 Aug 2005 22:06:11 +0000 (22:06 +0000)]
Fix a FIXME: if we are inserting code for a PHI argument, split the critical
edge so that the code is not always executed for both operands. This
prevents LSR from inserting code into loops whose exit blocks contain
PHI uses of IV expressions (which are outside of loops). On gzip, for
example, we turn this ugly code:
.LBB_test_1: ; loopentry
add r27, r3, r28
lhz r27, 3(r27)
add r26, r4, r28
lhz r26, 3(r26)
add r25, r30, r28 ;; Only live if exiting the loop
add r24, r29, r28 ;; Only live if exiting the loop
cmpw cr0, r27, r26
bne .LBB_test_5 ; loopexit
into this:
.LBB_test_1: ; loopentry
or r27, r28, r28
add r28, r3, r27
lhz r28, 3(r28)
add r26, r4, r27
lhz r26, 3(r26)
cmpw cr0, r28, r26
beq .LBB_test_3 ; shortcirc_next.0
.LBB_test_2: ; loopentry.loopexit_crit_edge
add r2, r30, r27
add r8, r29, r27
b .LBB_test_9 ; loopexit
.LBB_test_2: ; shortcirc_next.0
...
blt .LBB_test_1
into this:
.LBB_test_1: ; loopentry
or r27, r28, r28
add r28, r3, r27
lhz r28, 3(r28)
add r26, r4, r27
lhz r26, 3(r26)
cmpw cr0, r28, r26
beq .LBB_test_3 ; shortcirc_next.0
.LBB_test_2: ; loopentry.loopexit_crit_edge
add r2, r30, r27
add r8, r29, r27
b .LBB_t_3: ; shortcirc_next.0
.LBB_test_3: ; shortcirc_next.0
...
blt .LBB_test_1
Next step: get the block out of the loop so that the loop is all
fall-throughs again.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22766
91177308-0d34-0410-b5e6-
96231b3b80d8
Chris Lattner [Fri, 12 Aug 2005 21:58:07 +0000 (21:58 +0000)]
Change break critical edges to not remove, then insert, PHI node entries.
Instead, just update the BB in-place. This is both faster, and it prevents
split-critical-edges from shuffling the PHI argument list unneccesarily.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22765
91177308-0d34-0410-b5e6-
96231b3b80d8
Andrew Lenharth [Fri, 12 Aug 2005 16:14:08 +0000 (16:14 +0000)]
match gcc's use of tabs, makes diffs easier
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22764
91177308-0d34-0410-b5e6-
96231b3b80d8