[llvm-exegesis] Add lit tests.

[courbet]

Summary

Right now we only have unit tests. This will allow testing the whole
tool. Even though We can't really check actual values, this will avoid
regressions such as PR39055.

[courbet]

Fix target support: x86 -> X86.

[lebedev.ri]

llvm/trunk/test/tools/llvm-exegesis/X86/lit.local.cfg

4 ↗

(On Diff #166833)

You also need to be running on a CPU for which there is a llvm-exegesis-friendly sched profile (i.e. counters are specified), and you are allowed to read those counters.

[courbet]

llvm/trunk/test/tools/llvm-exegesis/X86/lit.local.cfg

4 ↗

(On Diff #166833)

Ah, yes, thanks Roman. I'll revert this.

[lebedev.ri]

llvm/trunk/test/tools/llvm-exegesis/X86/lit.local.cfg

4 ↗

(On Diff #166833)

Can you instead do run-time detection here?
Try running that runline, and if it fails, mark as unsupported?

test/CMakeLists.txt

set(LLVM_TEST_DEPENDS
           llvm-cxxfilt
           llvm-cxxmap
           llvm-diff
           llvm-dis
           llvm-dlltool
           dsymutil
           llvm-dwarfdump
           llvm-dwp
+          llvm-exegesis
           llvm-extract
           llvm-isel-fuzzer
           llvm-lib
           llvm-link
           llvm-lto2
           llvm-mc
           llvm-mca
           llvm-modextract

test/lit.cfg.py

tools = [
     ToolSubst('%ocamlopt', ocamlopt_command, unresolved='ignore'),
     ToolSubst('%opt-viewer', opt_viewer_cmd),
     ToolSubst('%llvm-objcopy', FindTool('llvm-objcopy')),
     ToolSubst('%llvm-strip', FindTool('llvm-strip')),
 ]
 
 # FIXME: Why do we have both `lli` and `%lli` that do slightly different things?
 tools.extend([
-    'dsymutil', 'lli', 'lli-child-target', 'llvm-ar', 'llvm-as', 'llvm-bcanalyzer',
-    'llvm-config', 'llvm-cov', 'llvm-cxxdump', 'llvm-cvtres', 'llvm-diff', 'llvm-dis',
-    'llvm-dwarfdump', 'llvm-extract', 'llvm-isel-fuzzer', 'llvm-opt-fuzzer', 'llvm-lib',
-    'llvm-link', 'llvm-lto', 'llvm-lto2', 'llvm-mc', 'llvm-mca',
-    'llvm-modextract', 'llvm-nm', 'llvm-objcopy', 'llvm-objdump',
-    'llvm-pdbutil', 'llvm-profdata', 'llvm-ranlib', 'llvm-readobj',
-    'llvm-rtdyld', 'llvm-size', 'llvm-split', 'llvm-strings', 'llvm-strip', 'llvm-tblgen',
-    'llvm-undname', 'llvm-c-test', 'llvm-cxxfilt', 'llvm-xray', 'yaml2obj', 'obj2yaml',
-    'yaml-bench', 'verify-uselistorder',
-    'bugpoint', 'llc', 'llvm-symbolizer', 'opt', 'sancov', 'sanstats'])
+    'dsymutil', 'lli', 'lli-child-target', 'llvm-ar', 'llvm-as',
+    'llvm-bcanalyzer', 'llvm-config', 'llvm-cov', 'llvm-cxxdump', 'llvm-cvtres',
+    'llvm-diff', 'llvm-dis', 'llvm-dwarfdump', 'llvm-exegesis', 'llvm-extract',
+    'llvm-isel-fuzzer', 'llvm-opt-fuzzer', 'llvm-lib', 'llvm-link', 'llvm-lto',
+    'llvm-lto2', 'llvm-mc', 'llvm-mca', 'llvm-modextract', 'llvm-nm',
+    'llvm-objcopy', 'llvm-objdump', 'llvm-pdbutil', 'llvm-profdata',
+    'llvm-ranlib', 'llvm-readobj', 'llvm-rtdyld', 'llvm-size', 'llvm-split',
+    'llvm-strings', 'llvm-strip', 'llvm-tblgen', 'llvm-undname', 'llvm-c-test',
+    'llvm-cxxfilt', 'llvm-xray', 'yaml2obj', 'obj2yaml', 'yaml-bench',
+    'verify-uselistorder', 'bugpoint', 'llc', 'llvm-symbolizer', 'opt',
+    'sancov', 'sanstats'])
 
 # The following tools are optional
 tools.extend([
     ToolSubst('llvm-go', unresolved='ignore'),
     ToolSubst('llvm-mt', unresolved='ignore'),
     ToolSubst('Kaleidoscope-Ch3', unresolved='ignore'),
     ToolSubst('Kaleidoscope-Ch4', unresolved='ignore'),
     ToolSubst('Kaleidoscope-Ch5', unresolved='ignore'),

test/tools/llvm-exegesis/X86/latency-by-opcode-name.s

+# RUN: llvm-exegesis -mode=latency -opcode-name=ADD32rr | FileCheck %s
+
+CHECK:      mode:            latency
+CHECK-NEXT: key:
+CHECK-NEXT:   instructions:
+CHECK-NEXT:     ADD32rr

test/tools/llvm-exegesis/X86/lit.local.cfg

+if not ('x86' in config.root.target_triple):
+    config.unsupported = True

test/tools/llvm-exegesis/X86/uops-by-opcode-name.s

+# RUN: llvm-exegesis -mode=uops -opcode-name=ADD32rr | FileCheck %s
+
+CHECK:      mode:            uops
+CHECK-NEXT: key:
+CHECK-NEXT:   instructions:
+CHECK-NEXT:     ADD32rr

test/tools/llvm-exegesis/lit.local.cfg

+if 'native' not in config.available_features:
+    config.unsupported = True