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# 70bfe661 12-Jan-2018 Stefan Pintilie <[email protected]>

Revert "[PowerPC] Manually schedule the prologue and epilogue"

This reverts commit r322124 since some tests were broken by that patch.
Will recommmit once the patch is fixed.

llvm-svn: 322369
# 17127008 09-Jan-2018 Stefan Pintilie <[email protected]>

[PowerPC] Manually schedule the prologue and epilogue

This patch makes the following changes to the schedule of instructions in the
prologue and epilogue.

The stack pointer update is moved down in

[PowerPC] Manually schedule the prologue and epilogue

This patch makes the following changes to the schedule of instructions in the
prologue and epilogue.

The stack pointer update is moved down in the prologue so that the callee saves
do not have to wait for the update to happen.
Saving the lr is moved down in the prologue to hide the latency of the mflr.
The stack pointer is moved up in the epilogue so that restoring of the lr can
happen sooner.
The mtlr is moved up in the epilogue so that it is away form the blr at the end
of the epilogue. The latency of the mtlr can now be hidden by the loads of the
callee saved registers.

This commit is almost identical to this one: r322036 except that two warnings
that broke build bots have been fixed.

The revision number is D41737 as before.

llvm-svn: 322124

show more ...


# 7e10987b 09-Jan-2018 Stefan Pintilie <[email protected]>

Revert "[PowerPC] Manually schedule the prologue and epilogue"

[PowerPC] This reverts commit r322036.

Failing build bots. Revert the commit now.

llvm-svn: 322051
# 55bfdd04 08-Jan-2018 Stefan Pintilie <[email protected]>

[PowerPC] Manually schedule the prologue and epilogue

This patch makes the following changes to the schedule of instructions in the
prologue and epilogue.

The stack pointer update is moved down in

[PowerPC] Manually schedule the prologue and epilogue

This patch makes the following changes to the schedule of instructions in the
prologue and epilogue.

The stack pointer update is moved down in the prologue so that the callee saves
do not have to wait for the update to happen.
Saving the lr is moved down in the prologue to hide the latency of the mflr.
The stack pointer is moved up in the epilogue so that restoring of the lr can
happen sooner.
The mtlr is moved up in the epilogue so that it is away form the blr at the end
of the epilogue. The latency of the mtlr can now be hidden by the loads of the
callee saved registers.

Differential Revision: https://reviews.llvm.org/D41737

llvm-svn: 322036

show more ...


Revision tags: llvmorg-5.0.1, llvmorg-5.0.1-rc3, llvmorg-5.0.1-rc2, llvmorg-5.0.1-rc1, llvmorg-5.0.0, llvmorg-5.0.0-rc5, llvmorg-5.0.0-rc4, llvmorg-5.0.0-rc3, llvmorg-5.0.0-rc2, llvmorg-5.0.0-rc1
# d5acad05 11-Jul-2017 Tony Jiang <[email protected]>

[PPC] Fix two bugs in frame lowering.

1. The available program storage region of the red zone to compilers is 288
bytes rather than 244 bytes.
2. The formula for negative number alignment calculati

[PPC] Fix two bugs in frame lowering.

1. The available program storage region of the red zone to compilers is 288
bytes rather than 244 bytes.
2. The formula for negative number alignment calculation should be
y = x & ~(n-1) rather than y = (x + (n-1)) & ~(n-1).

Differential Revision: https://reviews.llvm.org/D34337

llvm-svn: 307672

show more ...