1 files changed, 82 insertions, 0 deletions
diff --git a/llvm/test/tools/llvm-exegesis/X86/analysis-cluster-stabilization.test b/llvm/test/tools/llvm-exegesis/X86/analysis-cluster-stabilization.test
new file mode 100644
index 00000000000..aa14d7b8e86
--- /dev/null
+++ b/llvm/test/tools/llvm-exegesis/X86/analysis-cluster-stabilization.test
@@ -0,0 +1,82 @@
+# RUN: llvm-exegesis -mode=analysis -benchmarks-file=%s -analysis-clusters-output-file=- -analysis-epsilon=0.1 -analysis-numpoints=1 | FileCheck -check-prefixes=CHECK-CLUSTERS %s
+# RUN: llvm-exegesis -mode=analysis -benchmarks-file=%s -analysis-inconsistencies-output-file=- -analysis-epsilon=0.5 -analysis-numpoints=1 | FileCheck -check-prefixes=CHECK-INCONSISTENCIES-ALL,CHECK-INCONSISTENCIES-STABLE %s
+# RUN: llvm-exegesis -mode=analysis -benchmarks-file=%s -analysis-inconsistencies-output-file=- -analysis-epsilon=0.5 -analysis-display-unstable-clusters -analysis-numpoints=1 | FileCheck -check-prefixes=CHECK-INCONSISTENCIES-ALL,CHECK-INCONSISTENCIES-UNSTABLE %s
+
+# We have one ADD32rr measurement, and two measurements for SQRTSSr.
+# The ADD32rr measurement and one of the SQRTSSr measurements are identical,
+# and thus will be be in the same cluster. But the second SQRTSSr measurement
+# is different from the first SQRTSSr measurement, and thus it will be in it's
+# own cluster. We do reclusterization, and thus since there is more than one
+# measurement from SQRTSSr, and they are not in the same cluster, we move
+# all two SQRTSSr measurements into their own cluster, and mark it as unstable.
+# By default, we do not show such unstable clusters.
+# If told to show, we *only* show such unstable clusters.
+
+# CHECK-CLUSTERS: {{^}}cluster_id,opcode_name,config,sched_class,latency{{$}}
+# CHECK-CLUSTERS-NEXT: {{^}}0,
+# CHECK-CLUSTERS-SAME: ,90.00{{$}}
+# CHECK-CLUSTERS: {{^}}3,
+# CHECK-CLUSTERS-SAME: ,90.11{{$}}
+# CHECK-CLUSTERS-NEXT: {{^}}3,
+# CHECK-CLUSTERS-SAME: ,100.00{{$}}
+
+# CHECK-INCONSISTENCIES-STABLE: ADD32rr
+# CHECK-INCONSISTENCIES-STABLE-NOT: ADD32rr
+# CHECK-INCONSISTENCIES-STABLE-NOT: SQRTSSr
+
+# CHECK-INCONSISTENCIES-UNSTABLE: SQRTSSr
+# CHECK-INCONSISTENCIES-UNSTABLE: SQRTSSr
+# CHECK-INCONSISTENCIES-UNSTABLE-NOT: SQRTSSr
+# CHECK-INCONSISTENCIES-UNSTABLE-NOT: ADD32rr
+
+---
+mode:            latency
+key:
+  instructions:
+    - 'ADD32rr EDX EDX EAX'
+  config:          ''
+  register_initial_values:
+    - 'EDX=0x0'
+    - 'EAX=0x0'
+cpu_name:        bdver2
+llvm_triple:     x86_64-unknown-linux-gnu
+num_repetitions: 10000
+measurements:
+  - { key: latency, value: 90.0000, per_snippet_value: 90.0000 }
+error:           ''
+info:            Repeating a single implicitly serial instruction
+assembled_snippet: BA00000000B80000000001C201C201C201C201C201C201C201C201C201C201C201C201C201C201C201C2C3
+---
+mode:            latency
+key:
+  instructions:
+    - 'SQRTSSr XMM11 XMM11'
+  config:          ''
+  register_initial_values:
+    - 'XMM11=0x0'
+cpu_name:        bdver2
+llvm_triple:     x86_64-unknown-linux-gnu
+num_repetitions: 10000
+measurements:
+  - { key: latency, value: 90.1111, per_snippet_value: 90.1111 }
+error:           ''
+info:            Repeating a single explicitly serial instruction
+assembled_snippet: 4883EC10C7042400000000C744240400000000C744240800000000C744240C00000000C57A6F1C244883C410F3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBC3
+...
+---
+mode:            latency
+key:
+  instructions:
+    - 'SQRTSSr XMM11 XMM11'
+  config:          ''
+  register_initial_values:
+    - 'XMM11=0x0'
+cpu_name:        bdver2
+llvm_triple:     x86_64-unknown-linux-gnu
+num_repetitions: 10000
+measurements:
+  - { key: latency, value: 100, per_snippet_value: 100 }
+error:           ''
+info:            Repeating a single explicitly serial instruction
+assembled_snippet: 4883EC10C7042400000000C744240400000000C744240800000000C744240C00000000C57A6F1C244883C410F3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBF3450F51DBC3
+...