Roman Lebedev 5e32be7f94 [MustExecute] checkForAllContext(): use pre-increment ... Summary: You'd think there is no difference, but this halves (yikes!) compiler memory usage on `test-suite/MultiSource/Applications/SPASS/top.c` test, because `MustBeExecutedIterator operator++()` is, well, post-increment, it must create a duplicate of existing `MustBeExecutedIterator`, which involves duplicating `VisitedSetTy Visited` which is `DenseSet`.. Old ``` 0.3573 ( 42.9%) 0.0264 ( 33.7%) 0.3837 ( 42.1%) 0.3837 ( 42.1%) Deduce and propagate attributes (CGSCC pass) 0.1011 ( 12.1%) 0.0199 ( 25.4%) 0.1210 ( 13.3%) 0.1210 ( 13.3%) Deduce and propagate attributes ``` ``` total runtime: 20.04s. bytes allocated in total (ignoring deallocations): 1.09GB (54.63MB/s) calls to allocation functions: 1142410 (57020/s) temporary memory allocations: 500538 (24983/s) peak heap memory consumption: 26.68MB peak RSS (including heaptrack overhead): 944.85MB total memory leaked: 8.85MB ``` New: ``` 0.3309 ( 39.8%) 0.0164 ( 33.3%) 0.3473 ( 39.5%) 0.3473 ( 39.5%) Deduce and propagate attributes (CGSCC pass) 0.1152 ( 13.9%) 0.0076 ( 15.5%) 0.1229 ( 14.0%) 0.1229 ( 14.0%) Deduce and propagate attributes ``` ``` total runtime: 19.49s. bytes allocated in total (ignoring deallocations): 575.07MB (29.51MB/s) calls to allocation functions: 909059 (46651/s) temporary memory allocations: 276923 (14211/s) peak heap memory consumption: 26.68MB peak RSS (including heaptrack overhead): 942.90MB total memory leaked: 8.85MB ``` Diff: ``` total runtime: -0.55s. bytes allocated in total (ignoring deallocations): -519.41MB (946.11MB/s) calls to allocation functions: -233351 (425047/s) temporary memory allocations: -223615 (407313/s) peak heap memory consumption: 0B peak RSS (including heaptrack overhead): 0B total memory leaked: 0B ``` Reviewers: jdoerfert Reviewed By: jdoerfert Subscribers: llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D78225		2020-04-16 00:12:17 +03:00
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llvm	[MustExecute] checkForAllContext(): use pre-increment	2020-04-16 00:12:17 +03:00
llvm-c	[ORC] Add an OrcV2 C API function for configuring TargetMachines.	2020-04-10 15:51:29 -07:00