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Reland [AArch64][DebugInfo] Do not recompute CalleeSavedStackSize (Take 2)

Authored by sdesmalen on Oct 29 2019, 5:49 AM.

Description

Reland [AArch64][DebugInfo] Do not recompute CalleeSavedStackSize (Take 2)

llvm/test/DebugInfo/MIR/X86/live-debug-values-reg-copy.mir failed with
EXPENSIVE_CHECKS enabled, causing the patch to be reverted in
rG2c496bb5309c972d59b11f05aee4782ddc087e71.

This patch relands the patch with a proper fix to the
live-debug-values-reg-copy.mir tests, by ensuring the MIR encodes the
callee-saves correctly so that the CalleeSaved info is taken from MIR
directly, rather than letting it be recalculated by the PEI pass. I've
done this by running llc -stop-before=prologepilog on the LLVM
IR as captured in the test files, adding the extra MOV instructions
that were manually added in the original test file, then running `llc
-run-pass=prologepilog` and finally re-added the comments for the MOV
instructions.

Details

Committed
sdesmalenOct 29 2019, 9:13 AM
Parents
rGf228b5371647: [SLP] Generalization of stores vectorization.
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