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llvm-svn: 82641

Fix a comment typo and some whitespace.

llvm-svn: 82285

Record variable debug info at ISel time directly.

llvm-svn: 79742

Don't setCalleeSavedInfoValid() until spills are interted.

In a naked function, the flag is never set and getPristineRegs() returns an
empty list. That means naked functions are able to clobber call

Don't setCalleeSavedInfoValid() until spills are interted.

In a naked function, the flag is never set and getPristineRegs() returns an
empty list. That means naked functions are able to clobber callee saved
registers, but that is the whole point of naked functions.

This fixes PR4716.

llvm-svn: 79096

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Add MachineFrameInfo::getPristineRegisters(MBB) method.

llvm-svn: 78911

Use setPreservesAll and setPreservesCFG in CodeGen passes.

llvm-svn: 77754

Reapply r77654 with a fix: MachineFunctionPass's getAnalysisUsage
shouldn't do AU.setPreservesCFG(), because even though CodeGen passes
don't modify the LLVM IR CFG, they may modify the MachineFuncti

Reapply r77654 with a fix: MachineFunctionPass's getAnalysisUsage
shouldn't do AU.setPreservesCFG(), because even though CodeGen passes
don't modify the LLVM IR CFG, they may modify the MachineFunction CFG,
and passes like MachineLoop are registered with isCFGOnly set to true.

llvm-svn: 77691

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Revert r77654, it appears to be causing llvm-gcc bootstrap failures, and many
failures when building assorted projects with clang.

--- Reverse-merging r77654 into '.':
U include/llvm/CodeGen/Pass

Revert r77654, it appears to be causing llvm-gcc bootstrap failures, and many
failures when building assorted projects with clang.

--- Reverse-merging r77654 into '.':
U include/llvm/CodeGen/Passes.h
U include/llvm/CodeGen/MachineFunctionPass.h
U include/llvm/CodeGen/MachineFunction.h
U include/llvm/CodeGen/LazyLiveness.h
U include/llvm/CodeGen/SelectionDAGISel.h
D include/llvm/CodeGen/MachineFunctionAnalysis.h
U include/llvm/Function.h
U lib/Target/CellSPU/SPUISelDAGToDAG.cpp
U lib/Target/PowerPC/PPCISelDAGToDAG.cpp
U lib/CodeGen/LLVMTargetMachine.cpp
U lib/CodeGen/MachineVerifier.cpp
U lib/CodeGen/MachineFunction.cpp
U lib/CodeGen/PrologEpilogInserter.cpp
U lib/CodeGen/MachineLoopInfo.cpp
U lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
D lib/CodeGen/MachineFunctionAnalysis.cpp
D lib/CodeGen/MachineFunctionPass.cpp
U lib/CodeGen/LiveVariables.cpp

llvm-svn: 77661

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Manage MachineFunctions with an analysis Pass instead of the Annotable
mechanism. To support this, make MachineFunctionPass a little more
complete.

llvm-svn: 77654

Add support for naked functions

llvm-svn: 76198

Assume an inline asm might be a call, so we get
stack alignment right when it is. This is not
ideal but conservatively correct. Adjust a test
to compensate for changed stack offset value.
gcc.apple

Assume an inline asm might be a call, so we get
stack alignment right when it is. This is not
ideal but conservatively correct. Adjust a test
to compensate for changed stack offset value.
gcc.apple/asm-block-57.c

llvm-svn: 76120

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Scan for presence of calls and determine max callframe size early. To allow ProcessFunctionBeforeCalleeSaveScan() use this information

llvm-svn: 75942

Targets sometimes assign fixed stack object to spill certain callee-saved
registers based on dynamic conditions. For example, X86 EBP/RBP, when used as
frame register has to be spilled in the first f

Targets sometimes assign fixed stack object to spill certain callee-saved
registers based on dynamic conditions. For example, X86 EBP/RBP, when used as
frame register has to be spilled in the first fixed object. It should inform
PEI this so it doesn't get allocated another stack object. Also, it should not
be spilled as other callee-saved registers but rather its spilling and restoring
are being handled by emitPrologue and emitEpilogue. Avoid spilling it twice.

llvm-svn: 75116

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Use interators instead of counters for loops.

llvm-svn: 75046

Removing the HasBuiltinSetjmp flag and associated bits. Flagging the presence
of exception handling builtin sjlj targets in functions turns out not to
be necessary. Marking the intrinsic implementat

Removing the HasBuiltinSetjmp flag and associated bits. Flagging the presence
of exception handling builtin sjlj targets in functions turns out not to
be necessary. Marking the intrinsic implementation in the .td file as
defining all registers is sufficient to get the context saved properly by
the containing function.

llvm-svn: 71743

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PEI: rename PEI.h to PrologEpilogInserter.h to adhere to file naming standard

llvm-svn: 71678

Add support for GCC compatible builtin setjmp and longjmp intrinsics. This is
a supporting preliminary patch for GCC-compatible SjLJ exception handling. Note that these intrinsics are not designed to

Add support for GCC compatible builtin setjmp and longjmp intrinsics. This is
a supporting preliminary patch for GCC-compatible SjLJ exception handling. Note that these intrinsics are not designed to be invoked directly by the user, but
rather used by the front-end as target hooks for exception handling.

llvm-svn: 71610

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Restructure PEI code:

- moved shrink wrapping code from PrologEpilogInserter.cpp to
new file ShrinkWrapping.cpp.

- moved PEI pass definition into new shared header PEI.h.

llvm-svn: 71588

Apply patch review feedback.

llvm-svn: 71472

Unbreak non-debug build.

llvm-svn: 71457

Shrink wrapping in PEI:
- reduces _static_ callee saved register spills
and restores similar to Chow's original algorithm.
- iterative implementation with simple heuristic
limits to mitigate comp

Shrink wrapping in PEI:
- reduces _static_ callee saved register spills
and restores similar to Chow's original algorithm.
- iterative implementation with simple heuristic
limits to mitigate compile time impact.
- handles placing spills/restores for multi-entry,
multi-exit regions in the Machine CFG without
splitting edges.
- passes test-suite in LLCBETA mode.

Added contains() method to ADT/SparseBitVector.

llvm-svn: 71438

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Shrink wrapping in PEI: initial release. Finishing development, enable with --shrink-wrap.

llvm-svn: 67828

Fix PR3845: Avoid stale MachineInstruction pointer reference.

llvm-svn: 67649

Apply the patch requested in PR3846.

llvm-svn: 67364

Fix PEI to not walk off the start of a block when an updated instruction
is the first in its block. This is PR3842.

llvm-svn: 67304