[llvm-bugs] [Bug 37678] New: [-print-schedule]: Default to the instruction throughput to IssueWidth if no processor resource cycles are consumed.
llvm-bugs at lists.llvm.org
Mon Jun 4 06:54:15 PDT 2018
Bug ID: 37678
Summary: [-print-schedule]: Default to the instruction
throughput to IssueWidth if no processor resource
cycles are consumed.
OS: Windows NT
Component: new bugs
Assignee: unassignedbugs at nondot.org
Reporter: andrea.dibiagio at gmail.com
CC: llvm-bugs at lists.llvm.org
This came up during the review of : https://reviews.llvm.org/D47374
The -print-schedule functionality doesn't know how to handle instruction that
doesn't "consume" processor resource cycles.
Ideally, the throughput of an instruction that doesn't consume processor
resources (for example: a zero latency instruction) should default to the value
of `IssueWidth / #MicroOps`.
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