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llvm-mirror/lib/MCA
Andrea Di Biagio 79ed672fa3 [MCA][InstrBuilder] Correctly mark reserved resources in initializeUsedResources.
This fixes a bug reported by Alex Renda on LLVMDev where mca did not correctly
mark a resource group as "reserved".
(See http://lists.llvm.org/pipermail/llvm-dev/2020-May/141485.html).

The issue was caused by a wrong check in function `initializeUsedResources`.
As a consequence of this, a resource group was left unreserved, and its field
`NumUnits` incorrectly reported an unrealistic number of consumed resource
units.

This patch fixes the issue with the handling of reserved resources in the
InstrBuilder class, and adds a simple test for it.  Ideally, as suggested by
Andy Trick, most of these problems will disappear if in the future we will
introduce a (optional) DelayCycles vector for SchedWriteRes.
2020-05-10 19:25:54 +01:00
..
HardwareUnits
Stages
CMakeLists.txt
CodeEmitter.cpp
Context.cpp
HWEventListener.cpp
InstrBuilder.cpp [MCA][InstrBuilder] Correctly mark reserved resources in initializeUsedResources. 2020-05-10 19:25:54 +01:00
Instruction.cpp
LLVMBuild.txt
Pipeline.cpp
Support.cpp