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Convert -enable-sched-cycles and -enable-sched-hazard to -disable

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flags. They are still not enable in this revision.

Added TargetInstrInfo::isZeroCost() to fix a fundamental problem with
the scheduler's model of operand latency in the selection DAG.

Generalized unit tests to work with sched-cycles.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123969 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick
2011-01-21 05:51:33 +00:00
parent cd151d2f95
commit c8bfd1d78f
10 changed files with 89 additions and 64 deletions
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2
include/llvm/CodeGen/ScheduleHazardRecognizer.h
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@ -42,6 +42,8 @@ public:
unsigned getMaxLookAhead() const { return MaxLookAhead; }
bool isEnabled() const { return MaxLookAhead != 0; }
/// atIssueLimit - Return true if no more instructions may be issued in this
/// cycle.
virtual bool atIssueLimit() const { return false; }