[llvm] [LLVM] InstCount pass implemented when enabling stats (PR #171658)

IƱaki V Arrechea via llvm-commits llvm-commits at lists.llvm.org
Fri Dec 12 10:26:43 PST 2025


https://github.com/InakiVA updated https://github.com/llvm/llvm-project/pull/171658

>From 8618bf0d0cad36b5b875a0dd4f33a09eeb71c853 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Wed, 10 Dec 2025 17:12:00 +0000
Subject: [PATCH 01/14] Inst Count implemented for metrics pass

---
 llvm/lib/Passes/PassBuilderPipelines.cpp |  7 ++-
 llvm/test/Other/instcount.ll             | 74 ++++++++++++++++++++++++
 2 files changed, 80 insertions(+), 1 deletion(-)
 create mode 100644 llvm/test/Other/instcount.ll

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index c6beb3fdf09bd..865f24802af4b 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -21,6 +21,7 @@
 #include "llvm/Analysis/CtxProfAnalysis.h"
 #include "llvm/Analysis/GlobalsModRef.h"
 #include "llvm/Analysis/InlineAdvisor.h"
+#include "llvm/Analysis/InstCount.h"
 #include "llvm/Analysis/ProfileSummaryInfo.h"
 #include "llvm/Analysis/ScopedNoAliasAA.h"
 #include "llvm/Analysis/TypeBasedAliasAnalysis.h"
@@ -1701,6 +1702,11 @@ PassBuilder::buildPerModuleDefaultPipeline(OptimizationLevel Level,
   // Emit annotation remarks.
   addAnnotationRemarksPass(MPM);
 
+
+  // Count the types of instructions used
+  if (AreStatisticsEnabled())
+    MPM.addPass(createModuleToFunctionPassAdaptor(InstCountPass()));
+
   if (isLTOPreLink(Phase))
     addRequiredLTOPreLinkPasses(MPM);
   return MPM;
@@ -1813,7 +1819,6 @@ PassBuilder::buildThinLTOPreLinkDefaultPipeline(OptimizationLevel Level) {
   addAnnotationRemarksPass(MPM);
 
   addRequiredLTOPreLinkPasses(MPM);
-
   return MPM;
 }
 
diff --git a/llvm/test/Other/instcount.ll b/llvm/test/Other/instcount.ll
new file mode 100644
index 0000000000000..b043f26b28837
--- /dev/null
+++ b/llvm/test/Other/instcount.ll
@@ -0,0 +1,74 @@
+; RUN: opt -stats -passes=instcount < %s 2>&1 | FileCheck %s --check-prefix=UNOPT
+; RUN: opt -stats -O3 < %s 2>&1 | FileCheck %s --check-prefix=OPT
+
+; --- FIRST RUN (UNOPTIMIZED) ---
+; UNOPT-DAG: 8 instcount - Number of Br insts
+; UNOPT-DAG: 6 instcount - Number of Call insts
+; UNOPT-DAG: 2 instcount - Number of ICmp insts
+; UNOPT-DAG: 1 instcount - Number of Ret insts
+; UNOPT-DAG: 1 instcount - Number of Switch insts
+; UNOPT-DAG: 10 instcount - Number of basic blocks
+; UNOPT-DAG: 1 instcount - Number of non-external functions
+; UNOPT-DAG: 18 instcount - Number of instructions (of all types)
+
+; --- SECOND RUN (OPTIMIZED) ---
+; OPT-DAG: 8 instcount - Number of Br insts
+; OPT-DAG: 6 instcount - Number of Call insts
+; OPT-DAG: 2 instcount - Number of ICmp insts
+; OPT-DAG: 1 instcount - Number of Ret insts
+; OPT-DAG: 1 instcount - Number of Switch insts
+; OPT-DAG: 10 instcount - Number of basic blocks
+; OPT-DAG: 1 instcount - Number of non-external functions
+; OPT-DAG: 18 instcount - Number of instructions (of all types)
+
+
+define dso_local void @foo(i32 noundef %i, i32 noundef %j, i32 noundef %n) {
+entry:
+  %cmp = icmp slt i32 %i, %j
+  br i1 %cmp, label %if.then, label %if.end
+
+if.then:
+  call void @f()
+  br label %if.end
+
+if.end:
+  switch i32 %i, label %sw.default [
+    i32 1, label %sw.bb
+    i32 2, label %sw.bb1
+    i32 3, label %sw.bb1
+  ]
+
+sw.bb:
+  call void @g()
+  br label %sw.epilog
+
+sw.bb1:
+  call void @h()
+  br label %sw.epilog
+
+sw.default:
+  call void @k()
+  br label %sw.epilog
+
+sw.epilog:
+  %cmp2 = icmp sgt i32 %i, %n
+  br i1 %cmp2, label %if.then3, label %if.else
+
+if.then3:
+  call void @l()
+  br label %if.end4
+
+if.else:
+  call void @m()
+  br label %if.end4
+
+if.end4:
+  ret void
+}
+
+declare void @f()
+declare void @g()
+declare void @h()
+declare void @k()
+declare void @l()
+declare void @m()

>From c43bd804d6622e49d6febcfeb917f93b65915a36 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Wed, 10 Dec 2025 17:36:16 +0000
Subject: [PATCH 02/14] Whitespace fix

---
 llvm/lib/Passes/PassBuilderPipelines.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index 865f24802af4b..cf9c3075ce9f2 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -1702,13 +1702,13 @@ PassBuilder::buildPerModuleDefaultPipeline(OptimizationLevel Level,
   // Emit annotation remarks.
   addAnnotationRemarksPass(MPM);
 
-
   // Count the types of instructions used
   if (AreStatisticsEnabled())
     MPM.addPass(createModuleToFunctionPassAdaptor(InstCountPass()));
 
   if (isLTOPreLink(Phase))
     addRequiredLTOPreLinkPasses(MPM);
+  
   return MPM;
 }
 

>From 777eb40adefd877a825b670c4f5b62c71adffc20 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Wed, 10 Dec 2025 17:37:49 +0000
Subject: [PATCH 03/14] Whitespace fix

---
 llvm/lib/Passes/PassBuilderPipelines.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index cf9c3075ce9f2..0632858813dd3 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -1708,7 +1708,7 @@ PassBuilder::buildPerModuleDefaultPipeline(OptimizationLevel Level,
 
   if (isLTOPreLink(Phase))
     addRequiredLTOPreLinkPasses(MPM);
-  
+
   return MPM;
 }
 
@@ -1819,6 +1819,7 @@ PassBuilder::buildThinLTOPreLinkDefaultPipeline(OptimizationLevel Level) {
   addAnnotationRemarksPass(MPM);
 
   addRequiredLTOPreLinkPasses(MPM);
+  
   return MPM;
 }
 

>From 77deef83a99020d4963f98b3c042b3d793756e52 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Wed, 10 Dec 2025 17:52:17 +0000
Subject: [PATCH 04/14] Format

---
 llvm/lib/Passes/PassBuilderPipelines.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index 8e5d6b368c5b5..edafde9f68279 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -1855,7 +1855,7 @@ PassBuilder::buildThinLTOPreLinkDefaultPipeline(OptimizationLevel Level) {
   addAnnotationRemarksPass(MPM);
 
   addRequiredLTOPreLinkPasses(MPM);
-  
+
   return MPM;
 }
 

>From 9fd9380180a24683dd600bbc15b932a47928cc7e Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Thu, 11 Dec 2025 16:42:22 +0000
Subject: [PATCH 05/14] One check on test fix

---
 llvm/lib/Passes/PassBuilderPipelines.cpp |  7 +++--
 llvm/test/Other/instcount.ll             | 33 ++++++++----------------
 2 files changed, 14 insertions(+), 26 deletions(-)

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index edafde9f68279..24221d8ddf6f2 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -412,6 +412,9 @@ void PassBuilder::invokePipelineEarlySimplificationEPCallbacks(
 // Helper to add AnnotationRemarksPass.
 static void addAnnotationRemarksPass(ModulePassManager &MPM) {
   MPM.addPass(createModuleToFunctionPassAdaptor(AnnotationRemarksPass()));
+   // Count the types of instructions used
+  if (AreStatisticsEnabled())
+    MPM.addPass(createModuleToFunctionPassAdaptor(InstCountPass()));
 }
 
 // Helper to check if the current compilation phase is preparing for LTO
@@ -1738,10 +1741,6 @@ PassBuilder::buildPerModuleDefaultPipeline(OptimizationLevel Level,
   // Emit annotation remarks.
   addAnnotationRemarksPass(MPM);
 
-  // Count the types of instructions used
-  if (AreStatisticsEnabled())
-    MPM.addPass(createModuleToFunctionPassAdaptor(InstCountPass()));
-
   if (isLTOPreLink(Phase))
     addRequiredLTOPreLinkPasses(MPM);
 
diff --git a/llvm/test/Other/instcount.ll b/llvm/test/Other/instcount.ll
index b043f26b28837..c45ccc0bc4daa 100644
--- a/llvm/test/Other/instcount.ll
+++ b/llvm/test/Other/instcount.ll
@@ -1,25 +1,14 @@
-; RUN: opt -stats -passes=instcount < %s 2>&1 | FileCheck %s --check-prefix=UNOPT
-; RUN: opt -stats -O3 < %s 2>&1 | FileCheck %s --check-prefix=OPT
-
-; --- FIRST RUN (UNOPTIMIZED) ---
-; UNOPT-DAG: 8 instcount - Number of Br insts
-; UNOPT-DAG: 6 instcount - Number of Call insts
-; UNOPT-DAG: 2 instcount - Number of ICmp insts
-; UNOPT-DAG: 1 instcount - Number of Ret insts
-; UNOPT-DAG: 1 instcount - Number of Switch insts
-; UNOPT-DAG: 10 instcount - Number of basic blocks
-; UNOPT-DAG: 1 instcount - Number of non-external functions
-; UNOPT-DAG: 18 instcount - Number of instructions (of all types)
-
-; --- SECOND RUN (OPTIMIZED) ---
-; OPT-DAG: 8 instcount - Number of Br insts
-; OPT-DAG: 6 instcount - Number of Call insts
-; OPT-DAG: 2 instcount - Number of ICmp insts
-; OPT-DAG: 1 instcount - Number of Ret insts
-; OPT-DAG: 1 instcount - Number of Switch insts
-; OPT-DAG: 10 instcount - Number of basic blocks
-; OPT-DAG: 1 instcount - Number of non-external functions
-; OPT-DAG: 18 instcount - Number of instructions (of all types)
+; RUN: opt -stats -passes=instcount < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -O3 < %s 2>&1 | FileCheck %s
+
+; CHECK-DAG: 8 instcount - Number of Br insts
+; CHECK-DAG: 6 instcount - Number of Call insts
+; CHECK-DAG: 2 instcount - Number of ICmp insts
+; CHECK-DAG: 1 instcount - Number of Ret insts
+; CHECK-DAG: 1 instcount - Number of Switch insts
+; CHECK-DAG: 10 instcount - Number of basic blocks
+; CHECK-DAG: 1 instcount - Number of non-external functions
+; CHECK-DAG: 18 instcount - Number of instructions (of all types)
 
 
 define dso_local void @foo(i32 noundef %i, i32 noundef %j, i32 noundef %n) {

>From 3c8722d6b6cad52d54146ded6aa340184e9b81a5 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Thu, 11 Dec 2025 17:40:46 +0000
Subject: [PATCH 06/14] Test case simplified

---
 llvm/test/Other/instcount.ll | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/test/Other/instcount.ll b/llvm/test/Other/instcount.ll
index c45ccc0bc4daa..3df4346382258 100644
--- a/llvm/test/Other/instcount.ll
+++ b/llvm/test/Other/instcount.ll
@@ -11,7 +11,7 @@
 ; CHECK-DAG: 18 instcount - Number of instructions (of all types)
 
 
-define dso_local void @foo(i32 noundef %i, i32 noundef %j, i32 noundef %n) {
+define void @foo(i32 %i, i32 %j, i32 %n) {
 entry:
   %cmp = icmp slt i32 %i, %j
   br i1 %cmp, label %if.then, label %if.end

>From 5f8a6690e7dbff40dda798dd8f43cb53fcc0f308 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Thu, 11 Dec 2025 17:43:29 +0000
Subject: [PATCH 07/14] Clang format applied

---
 llvm/lib/Passes/PassBuilderPipelines.cpp | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index 24221d8ddf6f2..fce302754256a 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -191,9 +191,9 @@ static cl::opt<bool> EnablePostPGOLoopRotation(
     "enable-post-pgo-loop-rotation", cl::init(true), cl::Hidden,
     cl::desc("Run the loop rotation transformation after PGO instrumentation"));
 
-static cl::opt<bool> EnableGlobalAnalyses(
-    "enable-global-analyses", cl::init(true), cl::Hidden,
-    cl::desc("Enable inter-procedural analyses"));
+static cl::opt<bool>
+    EnableGlobalAnalyses("enable-global-analyses", cl::init(true), cl::Hidden,
+                         cl::desc("Enable inter-procedural analyses"));
 
 static cl::opt<bool> RunPartialInlining("enable-partial-inlining",
                                         cl::init(false), cl::Hidden,
@@ -412,7 +412,7 @@ void PassBuilder::invokePipelineEarlySimplificationEPCallbacks(
 // Helper to add AnnotationRemarksPass.
 static void addAnnotationRemarksPass(ModulePassManager &MPM) {
   MPM.addPass(createModuleToFunctionPassAdaptor(AnnotationRemarksPass()));
-   // Count the types of instructions used
+  // Count the types of instructions used
   if (AreStatisticsEnabled())
     MPM.addPass(createModuleToFunctionPassAdaptor(InstCountPass()));
 }
@@ -1181,11 +1181,10 @@ PassBuilder::buildModuleSimplificationPipeline(OptimizationLevel Level,
   // and prior to optimizing globals.
   // FIXME: This position in the pipeline hasn't been carefully considered in
   // years, it should be re-analyzed.
-  MPM.addPass(IPSCCPPass(
-              IPSCCPOptions(/*AllowFuncSpec=*/
-                            Level != OptimizationLevel::Os &&
-                            Level != OptimizationLevel::Oz &&
-                            !isLTOPreLink(Phase))));
+  MPM.addPass(IPSCCPPass(IPSCCPOptions(/*AllowFuncSpec=*/
+                                       Level != OptimizationLevel::Os &&
+                                       Level != OptimizationLevel::Oz &&
+                                       !isLTOPreLink(Phase))));
 
   // Attach metadata to indirect call sites indicating the set of functions
   // they may target at run-time. This should follow IPSCCP.

>From 378d928704c1610c3964097196eda5b786aafdd2 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Thu, 11 Dec 2025 18:25:36 +0000
Subject: [PATCH 08/14] Format retry

---
 llvm/lib/Passes/PassBuilderPipelines.cpp | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index fce302754256a..24221d8ddf6f2 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -191,9 +191,9 @@ static cl::opt<bool> EnablePostPGOLoopRotation(
     "enable-post-pgo-loop-rotation", cl::init(true), cl::Hidden,
     cl::desc("Run the loop rotation transformation after PGO instrumentation"));
 
-static cl::opt<bool>
-    EnableGlobalAnalyses("enable-global-analyses", cl::init(true), cl::Hidden,
-                         cl::desc("Enable inter-procedural analyses"));
+static cl::opt<bool> EnableGlobalAnalyses(
+    "enable-global-analyses", cl::init(true), cl::Hidden,
+    cl::desc("Enable inter-procedural analyses"));
 
 static cl::opt<bool> RunPartialInlining("enable-partial-inlining",
                                         cl::init(false), cl::Hidden,
@@ -412,7 +412,7 @@ void PassBuilder::invokePipelineEarlySimplificationEPCallbacks(
 // Helper to add AnnotationRemarksPass.
 static void addAnnotationRemarksPass(ModulePassManager &MPM) {
   MPM.addPass(createModuleToFunctionPassAdaptor(AnnotationRemarksPass()));
-  // Count the types of instructions used
+   // Count the types of instructions used
   if (AreStatisticsEnabled())
     MPM.addPass(createModuleToFunctionPassAdaptor(InstCountPass()));
 }
@@ -1181,10 +1181,11 @@ PassBuilder::buildModuleSimplificationPipeline(OptimizationLevel Level,
   // and prior to optimizing globals.
   // FIXME: This position in the pipeline hasn't been carefully considered in
   // years, it should be re-analyzed.
-  MPM.addPass(IPSCCPPass(IPSCCPOptions(/*AllowFuncSpec=*/
-                                       Level != OptimizationLevel::Os &&
-                                       Level != OptimizationLevel::Oz &&
-                                       !isLTOPreLink(Phase))));
+  MPM.addPass(IPSCCPPass(
+              IPSCCPOptions(/*AllowFuncSpec=*/
+                            Level != OptimizationLevel::Os &&
+                            Level != OptimizationLevel::Oz &&
+                            !isLTOPreLink(Phase))));
 
   // Attach metadata to indirect call sites indicating the set of functions
   // they may target at run-time. This should follow IPSCCP.

>From 8e04b3b2bae40eb76edcf50ffc00ca4fe3023943 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Thu, 11 Dec 2025 19:36:43 +0000
Subject: [PATCH 09/14] Passes test implementation successful

---
 llvm/test/Other/instcount.ll | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/llvm/test/Other/instcount.ll b/llvm/test/Other/instcount.ll
index 3df4346382258..7422403bdc031 100644
--- a/llvm/test/Other/instcount.ll
+++ b/llvm/test/Other/instcount.ll
@@ -1,5 +1,10 @@
 ; RUN: opt -stats -passes=instcount < %s 2>&1 | FileCheck %s
 ; RUN: opt -stats -O3 < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -O0 < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -passes='thinlto<O3>' < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -passes='thinlto-pre-link<O2>' < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -passes='lto<O1>' < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -passes='lto-pre-link<Os>' < %s 2>&1 | FileCheck %s
 
 ; CHECK-DAG: 8 instcount - Number of Br insts
 ; CHECK-DAG: 6 instcount - Number of Call insts

>From 8b303b26c2e6252ba824a00a8a8202b81fad467a Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Thu, 11 Dec 2025 19:36:51 +0000
Subject: [PATCH 10/14] Passes test implementation successful

---
 llvm/lib/Passes/PassBuilderPipelines.cpp |  2 ++
 llvm/test/Other/instcount.ll             | 14 +++++++-------
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index 24221d8ddf6f2..bb679bc8b5552 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -2427,6 +2427,8 @@ PassBuilder::buildO0DefaultPipeline(OptimizationLevel Level,
 
   MPM.addPass(createModuleToFunctionPassAdaptor(AnnotationRemarksPass()));
 
+  MPM.addPass(createModuleToFunctionPassAdaptor(InstCountPass()));
+
   return MPM;
 }
 
diff --git a/llvm/test/Other/instcount.ll b/llvm/test/Other/instcount.ll
index 7422403bdc031..66e3081405aea 100644
--- a/llvm/test/Other/instcount.ll
+++ b/llvm/test/Other/instcount.ll
@@ -1,10 +1,10 @@
-; RUN: opt -stats -passes=instcount < %s 2>&1 | FileCheck %s
-; RUN: opt -stats -O3 < %s 2>&1 | FileCheck %s
-; RUN: opt -stats -O0 < %s 2>&1 | FileCheck %s
-; RUN: opt -stats -passes='thinlto<O3>' < %s 2>&1 | FileCheck %s
-; RUN: opt -stats -passes='thinlto-pre-link<O2>' < %s 2>&1 | FileCheck %s
-; RUN: opt -stats -passes='lto<O1>' < %s 2>&1 | FileCheck %s
-; RUN: opt -stats -passes='lto-pre-link<Os>' < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -passes=instcount -disable-output < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -passes='thinlto<O3>' -disable-output < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -passes='thinlto-pre-link<O2>' -disable-output < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -passes='lto<O1>' -disable-output < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -passes='lto-pre-link<Os>' -disable-output < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -O3 -disable-output < %s 2>&1 | FileCheck %s
+; RUN: opt -stats -O0 -disable-output < %s 2>&1 | FileCheck %s
 
 ; CHECK-DAG: 8 instcount - Number of Br insts
 ; CHECK-DAG: 6 instcount - Number of Call insts

>From 7d96aa42366bdc8c14201670ff1367e3acb47560 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Thu, 11 Dec 2025 19:51:46 +0000
Subject: [PATCH 11/14] Clang format my change

---
 llvm/lib/Passes/PassBuilderPipelines.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index bb679bc8b5552..3763f4e312557 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -412,7 +412,7 @@ void PassBuilder::invokePipelineEarlySimplificationEPCallbacks(
 // Helper to add AnnotationRemarksPass.
 static void addAnnotationRemarksPass(ModulePassManager &MPM) {
   MPM.addPass(createModuleToFunctionPassAdaptor(AnnotationRemarksPass()));
-   // Count the types of instructions used
+  // Count the types of instructions used
   if (AreStatisticsEnabled())
     MPM.addPass(createModuleToFunctionPassAdaptor(InstCountPass()));
 }

>From 388cbc55a50a6d865568d9ccbeff6c742d39adc5 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Thu, 11 Dec 2025 20:42:01 +0000
Subject: [PATCH 12/14] PassBuilderPipelines pass updated

---
 llvm/lib/Passes/PassBuilderPipelines.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index 3763f4e312557..c1acf131dd927 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -2427,7 +2427,8 @@ PassBuilder::buildO0DefaultPipeline(OptimizationLevel Level,
 
   MPM.addPass(createModuleToFunctionPassAdaptor(AnnotationRemarksPass()));
 
-  MPM.addPass(createModuleToFunctionPassAdaptor(InstCountPass()));
+  // Emit annotation remarks.
+  addAnnotationRemarksPass(MPM);
 
   return MPM;
 }

>From b319de5b01c7f7b1970688fd6f354be40377b870 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Thu, 11 Dec 2025 22:11:50 +0000
Subject: [PATCH 13/14] Use of correct method substitution

---
 llvm/lib/Passes/PassBuilderPipelines.cpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index c1acf131dd927..a814743edd666 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -2425,8 +2425,6 @@ PassBuilder::buildO0DefaultPipeline(OptimizationLevel Level,
   if (isLTOPreLink(Phase))
     addRequiredLTOPreLinkPasses(MPM);
 
-  MPM.addPass(createModuleToFunctionPassAdaptor(AnnotationRemarksPass()));
-
   // Emit annotation remarks.
   addAnnotationRemarksPass(MPM);
 

>From ea3b02be9ee578dad00201e00ced1c06c889a282 Mon Sep 17 00:00:00 2001
From: Inaki Arrechea <inakiarrechea at google.com>
Date: Fri, 12 Dec 2025 18:26:02 +0000
Subject: [PATCH 14/14] Removed empty line

---
 llvm/lib/Passes/PassBuilderPipelines.cpp | 1 -
 1 file changed, 1 deletion(-)

diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index a814743edd666..67b9a61cc576f 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -1743,7 +1743,6 @@ PassBuilder::buildPerModuleDefaultPipeline(OptimizationLevel Level,
 
   if (isLTOPreLink(Phase))
     addRequiredLTOPreLinkPasses(MPM);
-
   return MPM;
 }
 



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