[llvm] [llvm-exegesis] Debug generated disassembly (PR #142540)

[Sjoerd Meijer via llvm-commits]

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@@ -588,6 +594,99 @@ class SubProcessFunctionExecutorImpl
   const std::optional<int> BenchmarkProcessCPU;
 };
 #endif // __linux__
+
+// Helper function to print generated assembly snippets
+void printGeneratedAssembly(
+    const std::vector<std::pair<std::string, std::pair<uint64_t, std::string>>>
+        &Instructions,
+    bool Preview, size_t PreviewFirst = 10, size_t PreviewLast = 3) {
+  dbgs() << "```\n";
+  size_t N = Instructions.size();
+  // Print first "PreviewFirst" lines or all if less
+  for (size_t i = 0; i < std::min(size_t(PreviewFirst), N); ++i) {
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sjoerdmeijer wrote:

Please drop the curly brackets { and } for any statements (if statements or for-loops) that have only 1 statement in this. This is much easier to read, and should be documented in the LLVM coding guidelines.

https://github.com/llvm/llvm-project/pull/142540