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# 84a2c780 11-Jul-2019 Jinsong Ji <[email protected]>

[PowerPC][NFC] Update testcase to avoid dead code

The original testcase might be optimized out due to dead code,
update the testcase to avoid it.

llvm-svn: 365810


Revision tags: llvmorg-8.0.1, llvmorg-8.0.1-rc4, llvmorg-8.0.1-rc3
# fee855b5 25-Jun-2019 Jinsong Ji <[email protected]>

[MachinePipeliner] Fix risky iterator usage R++, --R

When we calculate MII, we use two loops, one with iterator R++ to
check whether we can reserve the resource, then --R to move back
the iterator t

[MachinePipeliner] Fix risky iterator usage R++, --R

When we calculate MII, we use two loops, one with iterator R++ to
check whether we can reserve the resource, then --R to move back
the iterator to do reservation.

This is risky, as R++, --R may not point to the same element at all.
The can cause wrong MII.

Differential Revision: https://reviews.llvm.org/D63536

llvm-svn: 364353

show more ...


# bc7fc3ec 25-Jun-2019 Jinsong Ji <[email protected]>

[PowerPC][NFC]Add a test for MachinePipeliner bug

llvm-svn: 364350