[llvm] [llvm-exegesis] Skip benchmark entries with unknown opcodes in analysis mode (PR #201162)

[Aiden Grossman via llvm-commits]

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@@ -0,0 +1,74 @@
+# Verify that in analysis mode an entry referencing an unknown opcode (e.g. a
+# sample that has bitrotted due to instruction renaming) is skipped with a
+# warning instead of aborting, and that the remaining valid entries are still
+# analyzed.
+
+# RUN: llvm-exegesis -mode=analysis -benchmarks-file=%s -analysis-clusters-output-file=- -analysis-clustering-epsilon=0.1 -analysis-inconsistency-epsilon=0.1 -analysis-numpoints=1 -analysis-clustering=naive 2> %t.err | FileCheck -check-prefix=CHECK-CLUSTERS %s
+# RUN: FileCheck -check-prefix=CHECK-WARN %s < %t.err
+
+# CHECK-WARN: warning: skipping benchmark entry: No opcode with name 'NOT_A_REAL_OPCODE'
+
+# CHECK-CLUSTERS: {{^}}cluster_id,opcode_name,config,sched_class,
+# CHECK-CLUSTERS-NEXT: {{^}}0,
+
+---
+mode:            uops
+key:
+  instructions:
+    - 'NOT_A_REAL_OPCODE RAX'
+  config:          ''
+  register_initial_values: []
+cpu_name:        znver3
+llvm_triple:     x86_64-pc-linux-gnu
+num_repetitions: 10000
+measurements: []
+error:           ''
+...
+---
+mode:            uops
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boomanaiden154 wrote:

We probably can trim this second section down by a lot.

https://github.com/llvm/llvm-project/pull/201162