current PC. rdar://7834775
We now produce an identical .o file compared to the cctools
assembler for something like this:
_f0:
L0:
jmp L1
.long . - L0
L1:
jmp A
.long . - L1
.zerofill __DATA,_bss,A,0
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101227 91177308-0d34-0410-b5e6-96231b3b80d8
This test relies on iSel lowering dbg_declare intrinsic when CodeGen::OptLevel is None. On PPC side, CodeGen::OptLevel stays to default when -O0 is used on the command line.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101190 91177308-0d34-0410-b5e6-96231b3b80d8
numerator is an induction variable. For example, with code like this:
for (i=0;i<n;++i)
x[i%n] = 0;
IndVarSimplify will now recognize that i is always less than n inside
the loop, and eliminate the remainder.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101113 91177308-0d34-0410-b5e6-96231b3b80d8
If we have this situation:
jCC L1
jmp L2
L1:
...
L2:
...
We can get a small performance boost by emitting this instead:
jnCC L2
L1:
...
L2:
...
This testcase shows an example of this:
float func(float x, float y) {
double product = (double)x * y;
if (product == 0.0)
return product;
return product - 1.0;
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101075 91177308-0d34-0410-b5e6-96231b3b80d8
expression is a UDiv and it doesn't appear that the UDiv came from
the user's source.
ScalarEvolution has recently figured out how to compute a tripcount
expression for the inner loop in
SingleSource/Benchmarks/Shootout/sieve.c, using a udiv. Emitting a
udiv instruction dramatically slows down the enclosing loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101068 91177308-0d34-0410-b5e6-96231b3b80d8
ARM_AM::getSoImmVal(V) with a legitimate so_imm value: #245 rotate right by 2.
Introduce ARM_AM::getSOImmValOneOrNoRotate(unsigned Arg) which is called from
ARMInstPrinter.cpp's printSOImm() function, replacing ARM_AM::getSOImmVal(V).
[12:44:43] johnny:/Volumes/data/llvm/git/trunk (local-trunk) $ gdb Debug/bin/llvm-mc
GNU gdb 6.3.50-20050815 (Apple version gdb-1346) (Fri Sep 18 20:40:51 UTC 2009)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin"...Reading symbols for shared libraries ... done
(gdb) set args -triple=arm-apple-darwin9 -debug-only=arm-disassembler --disassemble
(gdb) r
Starting program: /Volumes/data/llvm/git/trunk/Debug/bin/llvm-mc -triple=arm-apple-darwin9 -debug-only=arm-disassembler --disassemble
Reading symbols for shared libraries ++. done
0xf5 0x71 0xf0 0x53
Opcode=201 Name=MVNi Format=ARM_FORMAT_DPFRM(4)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
-------------------------------------------------------------------------------------------------
| 0: 1: 0: 1| 0: 0: 1: 1| 1: 1: 1: 1| 0: 0: 0: 0| 0: 1: 1: 1| 0: 0: 0: 1| 1: 1: 1: 1| 0: 1: 0: 1|
-------------------------------------------------------------------------------------------------
mvnpls r7, Assertion failed: (V != -1 && "Not a valid so_imm value!"), function printSOImm, file ARMInstPrinter.cpp, line 229.
Program received signal SIGABRT, Aborted.
0x00007fff88c65886 in __kill ()
(gdb) bt
#0 0x00007fff88c65886 in __kill ()
#1 0x00007fff88d05eae in abort ()
#2 0x00007fff88cf2ef0 in __assert_rtn ()
#3 0x000000010020e422 in printSOImm (O=@0x1010bdf80, V=-1, VerboseAsm=false, MAI=0x1020106d0) at ARMInstPrinter.cpp:229
#4 0x000000010020e5fe in llvm::ARMInstPrinter::printSOImmOperand (this=0x1020107e0, MI=0x7fff5fbfee70, OpNum=1, O=@0x1010bdf80) at ARMInstPrinter.cpp:254
#5 0x00000001001ffbc0 in llvm::ARMInstPrinter::printInstruction (this=0x1020107e0, MI=0x7fff5fbfee70, O=@0x1010bdf80) at ARMGenAsmWriter.inc:3236
#6 0x000000010020c27c in llvm::ARMInstPrinter::printInst (this=0x1020107e0, MI=0x7fff5fbfee70, O=@0x1010bdf80) at ARMInstPrinter.cpp:182
#7 0x000000010003cbff in PrintInsts (DisAsm=@0x10200f4e0, Printer=@0x1020107e0, Bytes=@0x7fff5fbff060, SM=@0x7fff5fbff078) at Disassembler.cpp:65
#8 0x000000010003c8b4 in llvm::Disassembler::disassemble (T=@0x1010c13c0, Triple=@0x1010b6798, Buffer=@0x102010690) at Disassembler.cpp:153
#9 0x000000010004095c in DisassembleInput (ProgName=0x7fff5fbff3f0 "/Volumes/data/llvm/git/trunk/Debug/bin/llvm-mc") at llvm-mc.cpp:347
#10 0x000000010003eefb in main (argc=4, argv=0x7fff5fbff298) at llvm-mc.cpp:374
(gdb) q
The program is running. Exit anyway? (y or n) y
[13:36:26] johnny:/Volumes/data/llvm/git/trunk (local-trunk) $
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101053 91177308-0d34-0410-b5e6-96231b3b80d8
the loop exit test. This usually doesn't come up for a variety of
reasons, but it isn't impossible, so make IndVarSimplify handle it
conservatively.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101008 91177308-0d34-0410-b5e6-96231b3b80d8
variables. For example, with code like this:
for (i=0;i<n;++i)
if (i<n)
x[i] = 0;
IndVarSimplify will now recognize that i is always less than n inside
the loop, and eliminate the if.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101000 91177308-0d34-0410-b5e6-96231b3b80d8
into adjacent loops. Also, ensure that the insert position is
dominated by the loop latch of any loop in the post-inc set which
has a latch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100906 91177308-0d34-0410-b5e6-96231b3b80d8
forced constant is changed to a constant, we would end
up adding the instruction to the wrong worklist,
preventing it from being properly revisited. This fixes
rdar://7832370
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100837 91177308-0d34-0410-b5e6-96231b3b80d8
explicitly split into stride-and-offset pairs. Also, add the
ability to track multiple post-increment loops on the same expression.
This refines the concept of "normalizing" SCEV expressions used for
to post-increment uses, and introduces a dedicated utility routine for
normalizing and denormalizing expressions.
This fixes the expansion of expressions which are post-increment users
of more than one loop at a time. More broadly, this takes LSR another
step closer to being able to reason about more than one loop at a time.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100699 91177308-0d34-0410-b5e6-96231b3b80d8
