[flang-commits] [libc] [llvm] [lldb] [clang] [flang] [mlir] [compiler-rt] [libunwind] [clang-tools-extra] [libcxxabi] [lld] [libcxx] PR#72453 : Exceeding maximum file name length (PR #72654)

Shahid Iqbal via flang-commits flang-commits at lists.llvm.org
Mon Nov 20 01:40:47 PST 2023


https://github.com/shahidiqbal13 updated https://github.com/llvm/llvm-project/pull/72654

>From b6bfb18e25c111baf6c95a0a4a1c3d667bb25b6d Mon Sep 17 00:00:00 2001
From: Shahid Iqbal <shahidiqbal13 at gmail.com>
Date: Thu, 16 Nov 2023 11:26:43 -0500
Subject: [PATCH 1/6] TESTING infra

---
 clang/NOTES.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/clang/NOTES.txt b/clang/NOTES.txt
index f06ea8c70cd3409..c83dda52a1fc21e 100644
--- a/clang/NOTES.txt
+++ b/clang/NOTES.txt
@@ -4,6 +4,8 @@
 
 //===---------------------------------------------------------------------===//
 
+//TESTING git infra//
+
 To time GCC preprocessing speed without output, use:
    "time gcc -MM file"
 This is similar to -Eonly.

>From 7662d4f177d32c3159c1c48b11ce3884e4ea78c8 Mon Sep 17 00:00:00 2001
From: Shahid Iqbal <shahidiqbal13 at gmail.com>
Date: Fri, 17 Nov 2023 09:26:31 -0500
Subject: [PATCH 2/6] PR#72453 : Exceeding maximum file name length

---
 llvm/include/llvm/Analysis/DOTGraphTraitsPass.h | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h b/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
index 07c08bc1cc3bcb6..f78d8ff52ee3932 100644
--- a/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
+++ b/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
@@ -17,6 +17,8 @@
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/GraphWriter.h"
 
+#define MAX_FILENAME_LEN 255
+
 namespace llvm {
 
 /// Default traits class for extracting a graph from an analysis pass.
@@ -94,7 +96,7 @@ void printGraphForFunction(Function &F, GraphT Graph, StringRef Name,
   raw_fd_ostream File(Filename, EC, sys::fs::OF_TextWithCRLF);
   std::string GraphName = DOTGraphTraits<GraphT>::getGraphName(Graph);
 
-  if (!EC)
+  if (!EC && (Filename.length() <= MAX_FILENAME_LEN ))
     WriteGraph(File, Graph, IsSimple,
                GraphName + " for '" + F.getName() + "' function");
   else
@@ -280,7 +282,7 @@ class DOTGraphTraitsModulePrinterWrapperPass : public ModulePass {
     raw_fd_ostream File(Filename, EC, sys::fs::OF_TextWithCRLF);
     std::string Title = DOTGraphTraits<GraphT>::getGraphName(Graph);
 
-    if (!EC)
+    if (!EC && (Filename.length() <= MAX_FILENAME_LEN ))
       WriteGraph(File, Graph, IsSimple, Title);
     else
       errs() << "  error opening file for writing!";
@@ -310,7 +312,7 @@ void WriteDOTGraphToFile(Function &F, GraphT &&Graph,
   std::string GraphName = DOTGraphTraits<GraphT>::getGraphName(Graph);
   std::string Title = GraphName + " for '" + F.getName().str() + "' function";
 
-  if (!EC)
+  if (!EC && (Filename.length() <= MAX_FILENAME_LEN ))
     WriteGraph(File, Graph, IsSimple, Title);
   else
     errs() << "  error opening file for writing!";

>From d3d33e5bfe907b761ecb9065fe45b698c3ce0672 Mon Sep 17 00:00:00 2001
From: Shahid Iqbal <shahidiqbal13 at gmail.com>
Date: Fri, 17 Nov 2023 09:48:43 -0500
Subject: [PATCH 3/6] Reverted the earlier test text

---
 clang/NOTES.txt | 2 --
 1 file changed, 2 deletions(-)

diff --git a/clang/NOTES.txt b/clang/NOTES.txt
index c83dda52a1fc21e..f06ea8c70cd3409 100644
--- a/clang/NOTES.txt
+++ b/clang/NOTES.txt
@@ -4,8 +4,6 @@
 
 //===---------------------------------------------------------------------===//
 
-//TESTING git infra//
-
 To time GCC preprocessing speed without output, use:
    "time gcc -MM file"
 This is similar to -Eonly.

>From 41c19e2ceee80cce8a60d0fd869958a0783ddb7f Mon Sep 17 00:00:00 2001
From: Shahid Iqbal <shahidiqbal13 at gmail.com>
Date: Fri, 17 Nov 2023 10:06:52 -0500
Subject: [PATCH 4/6] Code refactoring

---
 llvm/include/llvm/Analysis/DOTGraphTraitsPass.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h b/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
index f78d8ff52ee3932..f7ab6df3b4dd819 100644
--- a/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
+++ b/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
@@ -96,7 +96,7 @@ void printGraphForFunction(Function &F, GraphT Graph, StringRef Name,
   raw_fd_ostream File(Filename, EC, sys::fs::OF_TextWithCRLF);
   std::string GraphName = DOTGraphTraits<GraphT>::getGraphName(Graph);
 
-  if (!EC && (Filename.length() <= MAX_FILENAME_LEN ))
+  if (!EC && (Filename.length() <= MAX_FILENAME_LEN))
     WriteGraph(File, Graph, IsSimple,
                GraphName + " for '" + F.getName() + "' function");
   else
@@ -282,7 +282,7 @@ class DOTGraphTraitsModulePrinterWrapperPass : public ModulePass {
     raw_fd_ostream File(Filename, EC, sys::fs::OF_TextWithCRLF);
     std::string Title = DOTGraphTraits<GraphT>::getGraphName(Graph);
 
-    if (!EC && (Filename.length() <= MAX_FILENAME_LEN ))
+    if (!EC && (Filename.length() <= MAX_FILENAME_LEN))
       WriteGraph(File, Graph, IsSimple, Title);
     else
       errs() << "  error opening file for writing!";
@@ -312,7 +312,7 @@ void WriteDOTGraphToFile(Function &F, GraphT &&Graph,
   std::string GraphName = DOTGraphTraits<GraphT>::getGraphName(Graph);
   std::string Title = GraphName + " for '" + F.getName().str() + "' function";
 
-  if (!EC && (Filename.length() <= MAX_FILENAME_LEN ))
+  if (!EC && (Filename.length() <= MAX_FILENAME_LEN))
     WriteGraph(File, Graph, IsSimple, Title);
   else
     errs() << "  error opening file for writing!";

>From 74f8c4e1f05de8449e0b27507f8a541e4695b3f4 Mon Sep 17 00:00:00 2001
From: Shahid Iqbal <shahidiqbal13 at gmail.com>
Date: Sat, 18 Nov 2023 06:33:12 -0500
Subject: [PATCH 5/6] Updated fix

---
 .../llvm/Analysis/DOTGraphTraitsPass.h        | 34 +++++++++++++++----
 1 file changed, 28 insertions(+), 6 deletions(-)

diff --git a/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h b/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
index f7ab6df3b4dd819..6731bef9678d272 100644
--- a/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
+++ b/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
@@ -17,7 +17,7 @@
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/GraphWriter.h"
 
-#define MAX_FILENAME_LEN 255
+static std::vector<std::string> nameObj;
 
 namespace llvm {
 
@@ -85,10 +85,29 @@ struct DOTGraphTraitsViewer
   StringRef Name;
 };
 
+static void shortenFileName(std::string &FN, unsigned char len = 250) {
+
+  FN = FN.substr(0, len);
+  if (nameObj.empty())
+    nameObj.push_back(FN);
+
+  else {
+    for (auto it = nameObj.begin(); it != nameObj.end(); it++) {
+      if (*it == FN) {
+        FN = FN.substr(0, --len);
+        nameObj.push_back(FN);
+        break;
+      }
+    }
+  }
+}
+
 template <typename GraphT>
 void printGraphForFunction(Function &F, GraphT Graph, StringRef Name,
                            bool IsSimple) {
-  std::string Filename = Name.str() + "." + F.getName().str() + ".dot";
+  std::string Filename = Name.str() + "." + F.getName().str();
+  shortenFileName(Filename);
+  Filename = Filename + ".dot";
   std::error_code EC;
 
   errs() << "Writing '" << Filename << "'...";
@@ -96,7 +115,7 @@ void printGraphForFunction(Function &F, GraphT Graph, StringRef Name,
   raw_fd_ostream File(Filename, EC, sys::fs::OF_TextWithCRLF);
   std::string GraphName = DOTGraphTraits<GraphT>::getGraphName(Graph);
 
-  if (!EC && (Filename.length() <= MAX_FILENAME_LEN))
+  if (!EC)
     WriteGraph(File, Graph, IsSimple,
                GraphName + " for '" + F.getName() + "' function");
   else
@@ -274,6 +293,7 @@ class DOTGraphTraitsModulePrinterWrapperPass : public ModulePass {
 
   bool runOnModule(Module &M) override {
     GraphT Graph = AnalysisGraphTraitsT::getGraph(&getAnalysis<AnalysisT>());
+    shortenFileName(Name);
     std::string Filename = Name + ".dot";
     std::error_code EC;
 
@@ -282,7 +302,7 @@ class DOTGraphTraitsModulePrinterWrapperPass : public ModulePass {
     raw_fd_ostream File(Filename, EC, sys::fs::OF_TextWithCRLF);
     std::string Title = DOTGraphTraits<GraphT>::getGraphName(Graph);
 
-    if (!EC && (Filename.length() <= MAX_FILENAME_LEN))
+    if (!EC)
       WriteGraph(File, Graph, IsSimple, Title);
     else
       errs() << "  error opening file for writing!";
@@ -303,7 +323,9 @@ class DOTGraphTraitsModulePrinterWrapperPass : public ModulePass {
 template <typename GraphT>
 void WriteDOTGraphToFile(Function &F, GraphT &&Graph,
                          std::string FileNamePrefix, bool IsSimple) {
-  std::string Filename = FileNamePrefix + "." + F.getName().str() + ".dot";
+  std::string Filename = FileNamePrefix + "." + F.getName().str();
+  shortenFileName(Filename);
+  Filename = Filename + ".dot";
   std::error_code EC;
 
   errs() << "Writing '" << Filename << "'...";
@@ -312,7 +334,7 @@ void WriteDOTGraphToFile(Function &F, GraphT &&Graph,
   std::string GraphName = DOTGraphTraits<GraphT>::getGraphName(Graph);
   std::string Title = GraphName + " for '" + F.getName().str() + "' function";
 
-  if (!EC && (Filename.length() <= MAX_FILENAME_LEN))
+  if (!EC)
     WriteGraph(File, Graph, IsSimple, Title);
   else
     errs() << "  error opening file for writing!";

>From 3945cf93bd2bbca9f32516a5041c7ac69cafd289 Mon Sep 17 00:00:00 2001
From: Shahid Iqbal <shahidiqbal13 at gmail.com>
Date: Mon, 20 Nov 2023 04:39:39 -0500
Subject: [PATCH 6/6] Updated fix with set as DS

---
 llvm/include/llvm/Analysis/DOTGraphTraitsPass.h | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h b/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
index 6731bef9678d272..90e20210a117af9 100644
--- a/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
+++ b/llvm/include/llvm/Analysis/DOTGraphTraitsPass.h
@@ -16,8 +16,9 @@
 #include "llvm/Analysis/CFGPrinter.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/GraphWriter.h"
+#include <unordered_set>
 
-static std::vector<std::string> nameObj;
+static std::unordered_set<std::string> nameObj;
 
 namespace llvm {
 
@@ -89,15 +90,18 @@ static void shortenFileName(std::string &FN, unsigned char len = 250) {
 
   FN = FN.substr(0, len);
   if (nameObj.empty())
-    nameObj.push_back(FN);
+    nameObj.insert(FN);
 
   else {
-    for (auto it = nameObj.begin(); it != nameObj.end(); it++) {
-      if (*it == FN) {
+    auto strLen = FN.length();
+    while (strLen > 0) {
+      if (auto it = nameObj.find(FN); it != nameObj.end()) {
         FN = FN.substr(0, --len);
-        nameObj.push_back(FN);
+      } else {
+        nameObj.insert(FN);
         break;
       }
+      strLen--;
     }
   }
 }



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