[PATCH] D121809: [LTO][ELF] Add --stats-file= option.

[liushuai wang via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rG1c04b52b2594: [LTO][ELF] Add --stats-file= option. (authored by MTC).
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D121809/new/

https://reviews.llvm.org/D121809

Files:
  lld/ELF/Config.h
  lld/ELF/Driver.cpp
  lld/ELF/LTO.cpp
  lld/ELF/Options.td
  lld/test/ELF/lto/stats-file-option.ll


Index: lld/test/ELF/lto/stats-file-option.ll
===================================================================
--- /dev/null
+++ lld/test/ELF/lto/stats-file-option.ll
@@ -0,0 +1,28 @@
+; RUN: llvm-as -o %t.bc %s
+
+;; Try to save statistics to file.
+; RUN: ld.lld --stats-file=%t2.stats -m elf_x86_64 -r -o %t.o %t.bc
+; RUN: FileCheck --input-file=%t2.stats %s
+
+; CHECK: {
+; CHECK: "asm-printer.EmittedInsts":
+; CHECK: "inline.NumInlined":
+; CHECK: "prologepilog.NumFuncSeen":
+; CHECK: }
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+declare i32 @patatino()
+
+define i32 @tinkywinky() {
+  %a = call i32 @patatino()
+  ret i32 %a
+}
+
+define i32 @main() !prof !0 {
+  %i = call i32 @tinkywinky()
+  ret i32 %i
+}
+
+!0 = !{!"function_entry_count", i64 300}
Index: lld/ELF/Options.td
===================================================================
--- lld/ELF/Options.td
+++ lld/ELF/Options.td
@@ -583,6 +583,8 @@
   HelpText<"Include hotness information in the optimization remarks file">;
 def opt_remarks_format: Separate<["--"], "opt-remarks-format">,
   HelpText<"The format used for serializing remarks (default: YAML)">;
+def opt_stats_filename: JJ<"stats-file=">,
+  HelpText<"Filename to write statistics to">;
 def save_temps: F<"save-temps">, HelpText<"Save intermediate LTO compilation results">;
 def lto_basic_block_sections: JJ<"lto-basic-block-sections=">,
   HelpText<"Enable basic block sections for LTO">;
Index: lld/ELF/LTO.cpp
===================================================================
--- lld/ELF/LTO.cpp
+++ lld/ELF/LTO.cpp
@@ -142,6 +142,9 @@
   c.RemarksHotnessThreshold = config->optRemarksHotnessThreshold;
   c.RemarksFormat = std::string(config->optRemarksFormat);
 
+  // Set up output file to emit statistics.
+  c.StatsFile = std::string(config->optStatsFilename);
+
   c.SampleProfile = std::string(config->ltoSampleProfile);
   c.UseNewPM = config->ltoNewPassManager;
   c.DebugPassManager = config->ltoDebugPassManager;
Index: lld/ELF/Driver.cpp
===================================================================
--- lld/ELF/Driver.cpp
+++ lld/ELF/Driver.cpp
@@ -1103,6 +1103,7 @@
   config->oFormatBinary = isOutputFormatBinary(args);
   config->omagic = args.hasFlag(OPT_omagic, OPT_no_omagic, false);
   config->optRemarksFilename = args.getLastArgValue(OPT_opt_remarks_filename);
+  config->optStatsFilename = args.getLastArgValue(OPT_opt_stats_filename);
 
   // Parse remarks hotness threshold. Valid value is either integer or 'auto'.
   if (auto *arg = args.getLastArg(OPT_opt_remarks_hotness_threshold)) {
Index: lld/ELF/Config.h
===================================================================
--- lld/ELF/Config.h
+++ lld/ELF/Config.h
@@ -122,6 +122,7 @@
   llvm::Optional<uint64_t> optRemarksHotnessThreshold = 0;
   llvm::StringRef optRemarksPasses;
   llvm::StringRef optRemarksFormat;
+  llvm::StringRef optStatsFilename;
   llvm::StringRef progName;
   llvm::StringRef printArchiveStats;
   llvm::StringRef printSymbolOrder;


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