Be careful when to add implicit kill / dead operands. Don't add them during / post reg-allocation.

llvm-svn: 36458

Clean up.

llvm-svn: 36449

Data structure change to improve compile time (especially in debug mode).

llvm-svn: 36447

Fix for PR1306.
- A register def / use now implicitly affects sub-register liveness but does
not affect liveness information of super-registers.
- Def of a larger register (if followed by a use later

Fix for PR1306.
- A register def / use now implicitly affects sub-register liveness but does
not affect liveness information of super-registers.
- Def of a larger register (if followed by a use later) is treated as
read/mod/write of a smaller register.

llvm-svn: 36434

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VarInfo::UsedBlocks is no longer used. Remove.

llvm-svn: 36250

Keep track of number of uses within the function per virtual register.

llvm-svn: 36214

Track the BB's where each virtual register is used.

llvm-svn: 35135

If a virtual register is already marked alive in this block, that means it is
alive in one of the successor block. Do not add it to the kill list.

llvm-svn: 35041

Avoid variable shadowing.

llvm-svn: 35039

Re-apply my liveintervalanalysis changes. Now with PR1207 fixes.

llvm-svn: 34428

For PR1207:
Revert patches that caused the problem. Evan, please investigate and reapply
when you've discovered the problem.

llvm-svn: 34399

- Use MRegister::regsOverlap().
- Allow LiveVariables to track liveness of more registers.

llvm-svn: 34379

Allow any MachineBasicBlock (not just the entry block) to have live-in physical
registers. Make sure liveinterval analysis is correctly creating live ranges
for them.

llvm-svn: 34217

Removed more <iostream> includes

llvm-svn: 32321

Do away with kill / dead maps. Move kill / dead info onto MI's.

llvm-svn: 31759

Add implicit def / use operands to MachineInstr.

llvm-svn: 31633

For PR786:
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting
fall out by removing unused variables. Remaining warnings have to do with
unused functions (I didn't want to dele

For PR786:
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting
fall out by removing unused variables. Remaining warnings have to do with
unused functions (I didn't want to delete code without review) and unused
variables in generated code. Maintainers should clean up the remaining
issues when they see them. All changes pass DejaGnu tests and Olden.

llvm-svn: 31380

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Fix for PR929. The PHI nodes were being gone through for each instruction
in a successor block for every block...resulting in some O(N^k) algorithm
which wasn't very good for performance. Calculating

Fix for PR929. The PHI nodes were being gone through for each instruction
in a successor block for every block...resulting in some O(N^k) algorithm
which wasn't very good for performance. Calculating this information up
front and keeping it in a map made it much faster.

llvm-svn: 30697

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Only call isUse/isDef on register operands

llvm-svn: 30118

Move two methods out of line, make them work when the record for a machine
instruction includes physregs.

llvm-svn: 30061

Eliminate RegisterAnalysis. RegisterPass now does all that is necessary.

llvm-svn: 29921

Eliminate data relocations by using NULL instead of global empty list.

llvm-svn: 29250

Remove a bunch more dead V9 specific stuff

llvm-svn: 28094

Add a LiveVariables::VarInfo::dump method

llvm-svn: 25080

Add section switching to common code generator code. Add a couple of
asserts.

llvm-svn: 24445