| f42b66169d75301346e3685fd2b3e45e47806367 |
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06-May-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Update LiveDebugVariables after live range splitting.
After a virtual register is split, update any debug user variables that resided
in the old register. This ensures that the LiveDebugVariables are still correct
after register allocation.
This may create DBG_VALUE instructions that place a user variable in a register
in parts of the function and in a stack slot in other parts. DwarfDebug
currently doesn't support that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130998 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/LiveDebugVariables.h
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| 42acf069c9e46395a2fa230ed6b89b402828e3d5 |
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03-Dec-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Emit DBG_VALUE instructions from LiveDebugVariables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120842 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/LiveDebugVariables.h
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| 30e2128a731e5a0bcac45a6a79a03bdedce68a0a |
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02-Dec-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Update LiveDebugVariables during coalescing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120720 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/LiveDebugVariables.h
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| 0613516b16466a92c68d60734801221506c85e86 |
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02-Dec-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Implement the first half of LiveDebugVariables.
Scan the MachineFunction for DBG_VALUE instructions, and replace them with a
data structure similar to LiveIntervals. The live range of a DBG_VALUE is
determined by propagating it down the dominator tree until a new DBG_VALUE is
found. When a DBG_VALUE lives in a register, its live range is confined to the
live range of the register's value.
LiveDebugVariables runs before coalescing, so DBG_VALUEs are not artificially
extended when registers are joined.
The missing half will recreate DBG_VALUE instructions from the intervals when
register allocation is complete.
The pass is disabled by default. It can be enabled with the temporary command
line option -live-debug-variables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120636 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/LiveDebugVariables.h
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| bb7b23f5b79a7ca2aa62faa1a6078428af597234 |
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30-Nov-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Stub out a new LiveDebugVariables pass.
This analysis is going to run immediately after LiveIntervals. It will stay
alive during register allocation and keep track of user variables mentioned in
DBG_VALUE instructions.
When the register allocator is moving values between registers and the stack, it
is very hard to keep track of DBG_VALUE instructions. We usually get it wrong.
This analysis maintains a data structure that makes it easy to update DBG_VALUE
instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120385 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/LiveDebugVariables.h
|