Chris Lattner 593c95878b Fix a nasty problem on two-address machines in the following situation: ...

store EAX -> [ss#0]
[ss#0] += 1
...
use(EAX)

In this case, it is not valid to rewrite this as:


store EAX -> [ss#0]
EAX += 1
store EAX -> [ss#0]  ;;; this would also delete the store above
...
use(EAX)

... because EAX is not a dead at that point.  Keep track of which registers
we are allowed to clobber, and which ones we aren't, and don't clobber the
ones we're not supposed to.  :)

This should resolve the issues on X86 last night.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25948 91177308-0d34-0410-b5e6-96231b3b80d8

2006-02-03 23:28:46 +00:00

..

SelectionDAG

Implement some feedback from sabre

2006-02-03 22:38:07 +00:00

AsmPrinter.cpp

Implement smart printing of inline asm strings, handling variants and

2006-02-01 22:41:11 +00:00

BranchFolding.cpp

…

DwarfWriter.cpp

Using bit size of integers instead of ambiguous "long" et all.

2006-01-27 20:31:25 +00:00

ELFWriter.cpp

add these so I can be less naughty

2005-12-28 06:29:02 +00:00

IntrinsicLowering.cpp

For PR411:

2006-01-16 21:12:35 +00:00

LiveInterval.cpp

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LiveIntervalAnalysis.cpp

Add explicit #includes of <iostream>

2006-01-22 23:41:00 +00:00

LiveVariables.cpp

Add a LiveVariables::VarInfo::dump method

2006-01-04 05:40:30 +00:00

MachineBasicBlock.cpp

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MachineCodeEmitter.cpp

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MachineDebugInfo.cpp

Fix build error that is apparently only a warning with some compilers.

2006-01-27 17:31:30 +00:00

MachineFunction.cpp

Allow the specification of explicit alignments for constant pool entries.

2006-01-31 22:23:14 +00:00

MachineInstr.cpp

…

Makefile

…

Passes.cpp

…

PHIElimination.cpp

Add support for targets (like Alpha) that have terminator instructions which

2006-01-04 07:12:21 +00:00

PhysRegTracker.h

…

PrologEpilogInserter.cpp

…

RegAllocLinearScan.cpp

Add explicit #includes of <iostream>

2006-01-22 23:41:00 +00:00

RegAllocLocal.cpp

Add explicit #includes of <iostream>

2006-01-22 23:41:00 +00:00

RegAllocSimple.cpp

Add explicit #includes of <iostream>

2006-01-22 23:41:00 +00:00

TwoAddressInstructionPass.cpp

Add explicit #includes of <iostream>

2006-01-22 23:41:00 +00:00

UnreachableBlockElim.cpp

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VirtRegMap.cpp

Fix a nasty problem on two-address machines in the following situation:

2006-02-03 23:28:46 +00:00

VirtRegMap.h

…