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* [PowerPC][NFC] Update testcase to avoid dead codeJinsong Ji2019-07-111-2/+2
| | | | | | | The original testcase might be optimized out due to dead code, update the testcase to avoid it. llvm-svn: 365810
* [MachinePipeliner] Fix risky iterator usage R++, --RJinsong Ji2019-06-251-1/+1
| | | | | | | | | | | | | 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
* [PowerPC][NFC]Add a test for MachinePipeliner bugJinsong Ji2019-06-251-0/+36
llvm-svn: 364350
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