2665d9c6f9
Change weight into a float so that we can take into account the
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nesting level when computing it. Right now the allocator uses:
w = sum_over_defs_uses( 10 ^ nesting level );
llvm-svn: 10569
2003-12-21 20:19:10 +00:00
c09b77ea35
Add support for inactive intervals. This effectively reuses registers
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for live ranges that fall into assigned registers' holes.
llvm-svn: 10566
2003-12-21 05:43:40 +00:00
7139090fd2
Remove TwoAddressInstruction from the public headers and add an ID
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instead, since this pass doesn't expose any state to its users.
llvm-svn: 10520
2003-12-18 22:40:24 +00:00
e5e2bd6777
Modify linear scan register allocator to use the two-address
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instruction pass. This also fixes all remaining bugs for this new
allocator to pass all tests under test/Programs.
llvm-svn: 10515
2003-12-18 13:15:02 +00:00
15b8036b29
When a variable is killed and redifined in a basic block only one
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killing instruction is tracked. This causes the LiveIntervals to
create bogus intervals. The workaound is to add a range to the
interval from the redefinition to the end of the basic block.
llvm-svn: 10510
2003-12-18 08:53:43 +00:00
40874c708f
Handle multiple virtual register definitions gracefully.
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Move some of the longer LiveIntervals::Interval method out of the
header and add debug information to them. Fix bug and simplify range
merging code.
llvm-svn: 10509
2003-12-18 08:48:48 +00:00
8870674da7
Change preserve all claim to just preserve live variables and phielimination.
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llvm-svn: 10469
2003-12-15 04:55:38 +00:00
aaba4639f8
Change interface of MachineOperand as follows:
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a) remove opIsUse(), opIsDefOnly(), opIsDefAndUse()
b) add isUse(), isDef()
c) rename opHiBits32() to isHiBits32(),
opLoBits32() to isLoBits32(),
opHiBits64() to isHiBits64(),
opLoBits64() to isLoBits64().
This results to much more readable code, for example compare
"op.opIsDef() || op.opIsDefAndUse()" to "op.isDef()" a pattern used
very often in the code.
llvm-svn: 10461
2003-12-14 13:24:17 +00:00
7dbdf3839c
Ignore non-allocatable physical registers in live interval analysis.
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llvm-svn: 10449
2003-12-13 11:11:02 +00:00
06f379a278
Handle explicit physical register defs.
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llvm-svn: 10445
2003-12-13 05:26:39 +00:00
2de099e54f
Move operator<<(std::ostream&, const LiveInterval&) out of the header file.
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llvm-svn: 10290
2003-12-05 10:38:28 +00:00
ed28ca93ef
Sort live intervals by increasing start point.
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llvm-svn: 10289
2003-12-05 10:32:01 +00:00
0e9ded74c0
Merging the linear scan register allocator in trunk. It currently passes most tests under test/Programs/SingleSource/Benchmarks/Shootout so development will continue on trunk. The allocator is not enabled by default. You will need to pass -regallo=linearscan to lli or llc to use it.
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llvm-svn: 10103
2003-11-20 03:32:25 +00:00
Alkis Evlogimenos