[clang] [compiler-rt] [Coverage] Fix mapping for do-while loops with terminating statements (PR #139777)

2025-05-19 Thread Justin Cady via cfe-commits 

https://github.com/justincady closed 
https://github.com/llvm/llvm-project/pull/139777
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[clang] [compiler-rt] [Coverage] Fix mapping for do-while loops with terminating statements (PR #139777)

2025-05-19 Thread via cfe-commits 

hiraditya wrote:

LGTM!

https://github.com/llvm/llvm-project/pull/139777
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[clang] [compiler-rt] [Coverage] Fix mapping for do-while loops with terminating statements (PR #139777)

2025-05-19 Thread Justin Cady via cfe-commits 

https://github.com/justincady updated 
https://github.com/llvm/llvm-project/pull/139777

>From be83c3207bf195aa7c6df1ce155402fde5911821 Mon Sep 17 00:00:00 2001
From: Justin Cady 
Date: Tue, 13 May 2025 15:08:45 -0400
Subject: [PATCH] [Coverage] Fix mapping for do-while loops with terminating
 statements

The current region mapping for do-while loops that contain statements
such as break or continue results in inaccurate line coverage reports
for the line following the loop.

This change handles terminating statements the same way that other loop
constructs do, correcting the region mapping for accurate reports. It
also fixes a fragile test relying on exact line numbers.

Fixes #139122
---
 clang/lib/CodeGen/CoverageMappingGen.cpp  |  5 ++---
 .../CoverageMapping/terminate-statements.cpp  | 13 +++-
 .../test/profile/Linux/coverage-do-while.c| 21 +++
 3 files changed, 35 insertions(+), 4 deletions(-)
 create mode 100644 compiler-rt/test/profile/Linux/coverage-do-while.c

diff --git a/clang/lib/CodeGen/CoverageMappingGen.cpp 
b/clang/lib/CodeGen/CoverageMappingGen.cpp
index 73811d15979d5..6170dc7f59107 100644
--- a/clang/lib/CodeGen/CoverageMappingGen.cpp
+++ b/clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -1703,14 +1703,13 @@ struct CounterCoverageMappingBuilder
 if (!IsCounterEqual(OutCount, ParentCount)) {
   pushRegion(OutCount);
   GapRegionCounter = OutCount;
+  if (BodyHasTerminateStmt)
+HasTerminateStmt = true;
 }
 
 // Create Branch Region around condition.
 if (!llvm::EnableSingleByteCoverage)
   createBranchRegion(S->getCond(), BodyCount, BranchCount.Skipped);
-
-if (BodyHasTerminateStmt)
-  HasTerminateStmt = true;
   }
 
   void VisitForStmt(const ForStmt *S) {
diff --git a/clang/test/CoverageMapping/terminate-statements.cpp 
b/clang/test/CoverageMapping/terminate-statements.cpp
index ef6b6fd82687d..93d655794ccf5 100644
--- a/clang/test/CoverageMapping/terminate-statements.cpp
+++ b/clang/test/CoverageMapping/terminate-statements.cpp
@@ -348,10 +348,20 @@ int elsecondnoret(void) {
 
 // CHECK-LABEL: _Z18statementexprnoretb:
 int statementexprnoret(bool crash) {
-  int rc = ({ if (crash) abort(); 0; }); // CHECK: File 0, 351:35 -> 352:12 = 
(#0 - #1)
+  int rc = ({ if (crash) abort(); 0; }); // CHECK: File 0, [[@LINE]]:35 -> 
[[@LINE+1]]:12 = (#0 - #1)
   return rc; // CHECK-NOT: Gap
 }
 
+// CHECK-LABEL: _Z13do_with_breaki:
+int do_with_break(int n) {
+  do {
+if (n == 87) {
+  break;
+}   // CHECK: File 0, [[@LINE-2]]:18 -> [[@LINE]]:6 = #2
+  } while (0);  // CHECK: File 0, [[@LINE]]:12 -> [[@LINE]]:13 = ((#0 + 
#1) - #2)
+  return 0; // CHECK-NOT: Gap,File 0, [[@LINE-1]]:15
+}
+
 int main() {
   foo(0);
   foo(1);
@@ -375,5 +385,6 @@ int main() {
   abstractcondnoret();
   elsecondnoret();
   statementexprnoret(false);
+  do_with_break(0);
   return 0;
 }
diff --git a/compiler-rt/test/profile/Linux/coverage-do-while.c 
b/compiler-rt/test/profile/Linux/coverage-do-while.c
new file mode 100644
index 0..9e112cbc4c6a3
--- /dev/null
+++ b/compiler-rt/test/profile/Linux/coverage-do-while.c
@@ -0,0 +1,21 @@
+// REQUIRES: lld-available
+// XFAIL: powerpc64-target-arch
+
+// RUN: %clangxx_profgen -fuse-ld=lld -fcoverage-mapping -o %t %s
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
+// RUN: llvm-profdata merge -o %t.profdata %t.profraw
+// RUN: llvm-cov show %t -instr-profile=%t.profdata 2>&1 | FileCheck %s
+
+#include 
+
+// clang-format off
+int main(int argc, char **argv) {   // CHECK:  [[@LINE]]| 1|int main(
+  do {  // CHECK:  [[@LINE]]| 1|  do {
+if (argc == 87) {   // CHECK:  [[@LINE]]| 1|if 
(argc
+  break;// CHECK:  [[@LINE]]| 0|  break
+}   // CHECK:  [[@LINE]]| 0|}
+  } while (0);  // CHECK:  [[@LINE]]| 1|  } while
+  printf("coverage after do is present\n"); // CHECK:  [[@LINE]]| 1|  printf(
+  return 0; // CHECK:  [[@LINE]]| 1|  return
+}   // CHECK:  [[@LINE]]| 1|}
+// clang-format on

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[clang] [compiler-rt] [Coverage] Fix mapping for do-while loops with terminating statements (PR #139777)

2025-05-19 Thread Zequan Wu via cfe-commits 

https://github.com/ZequanWu approved this pull request.

LGTM. Thanks for fixing it.

https://github.com/llvm/llvm-project/pull/139777
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[clang] [compiler-rt] [Coverage] Fix mapping for do-while loops with terminating statements (PR #139777)

2025-05-19 Thread Justin Cady via cfe-commits 

justincady wrote:

Ping. :)

https://github.com/llvm/llvm-project/pull/139777
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[clang] [compiler-rt] [Coverage] Fix mapping for do-while loops with terminating statements (PR #139777)

2025-05-14 Thread Alan Phipps via cfe-commits 

evodius96 wrote:

Thank you for looking at this!

https://github.com/llvm/llvm-project/pull/139777
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[clang] [compiler-rt] [Coverage] Fix mapping for do-while loops with terminating statements (PR #139777)

2025-05-13 Thread via cfe-commits 

llvmbot wrote:




@llvm/pr-subscribers-clang

Author: Justin Cady (justincady)


Changes

The current region mapping for do-while loops that contain statements
such as break or continue results in inaccurate line coverage reports
for the line following the loop.

This change handles terminating statements the same way that other loop
constructs do, correcting the region mapping for accurate reports. It
also fixes a fragile test relying on exact line numbers.

Fixes #139122


---
Full diff: https://github.com/llvm/llvm-project/pull/139777.diff


3 Files Affected:

- (modified) clang/lib/CodeGen/CoverageMappingGen.cpp (+2-3) 
- (modified) clang/test/CoverageMapping/terminate-statements.cpp (+12-1) 
- (added) compiler-rt/test/profile/Linux/coverage-do-while.c (+21) 


``diff
diff --git a/clang/lib/CodeGen/CoverageMappingGen.cpp 
b/clang/lib/CodeGen/CoverageMappingGen.cpp
index 73811d15979d5..6170dc7f59107 100644
--- a/clang/lib/CodeGen/CoverageMappingGen.cpp
+++ b/clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -1703,14 +1703,13 @@ struct CounterCoverageMappingBuilder
 if (!IsCounterEqual(OutCount, ParentCount)) {
   pushRegion(OutCount);
   GapRegionCounter = OutCount;
+  if (BodyHasTerminateStmt)
+HasTerminateStmt = true;
 }
 
 // Create Branch Region around condition.
 if (!llvm::EnableSingleByteCoverage)
   createBranchRegion(S->getCond(), BodyCount, BranchCount.Skipped);
-
-if (BodyHasTerminateStmt)
-  HasTerminateStmt = true;
   }
 
   void VisitForStmt(const ForStmt *S) {
diff --git a/clang/test/CoverageMapping/terminate-statements.cpp 
b/clang/test/CoverageMapping/terminate-statements.cpp
index ef6b6fd82687d..93d655794ccf5 100644
--- a/clang/test/CoverageMapping/terminate-statements.cpp
+++ b/clang/test/CoverageMapping/terminate-statements.cpp
@@ -348,10 +348,20 @@ int elsecondnoret(void) {
 
 // CHECK-LABEL: _Z18statementexprnoretb:
 int statementexprnoret(bool crash) {
-  int rc = ({ if (crash) abort(); 0; }); // CHECK: File 0, 351:35 -> 352:12 = 
(#0 - #1)
+  int rc = ({ if (crash) abort(); 0; }); // CHECK: File 0, [[@LINE]]:35 -> 
[[@LINE+1]]:12 = (#0 - #1)
   return rc; // CHECK-NOT: Gap
 }
 
+// CHECK-LABEL: _Z13do_with_breaki:
+int do_with_break(int n) {
+  do {
+if (n == 87) {
+  break;
+}   // CHECK: File 0, [[@LINE-2]]:18 -> [[@LINE]]:6 = #2
+  } while (0);  // CHECK: File 0, [[@LINE]]:12 -> [[@LINE]]:13 = ((#0 + 
#1) - #2)
+  return 0; // CHECK-NOT: Gap,File 0, [[@LINE-1]]:15
+}
+
 int main() {
   foo(0);
   foo(1);
@@ -375,5 +385,6 @@ int main() {
   abstractcondnoret();
   elsecondnoret();
   statementexprnoret(false);
+  do_with_break(0);
   return 0;
 }
diff --git a/compiler-rt/test/profile/Linux/coverage-do-while.c 
b/compiler-rt/test/profile/Linux/coverage-do-while.c
new file mode 100644
index 0..9e112cbc4c6a3
--- /dev/null
+++ b/compiler-rt/test/profile/Linux/coverage-do-while.c
@@ -0,0 +1,21 @@
+// REQUIRES: lld-available
+// XFAIL: powerpc64-target-arch
+
+// RUN: %clangxx_profgen -fuse-ld=lld -fcoverage-mapping -o %t %s
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
+// RUN: llvm-profdata merge -o %t.profdata %t.profraw
+// RUN: llvm-cov show %t -instr-profile=%t.profdata 2>&1 | FileCheck %s
+
+#include 
+
+// clang-format off
+int main(int argc, char **argv) {   // CHECK:  [[@LINE]]| 1|int main(
+  do {  // CHECK:  [[@LINE]]| 1|  do {
+if (argc == 87) {   // CHECK:  [[@LINE]]| 1|if 
(argc
+  break;// CHECK:  [[@LINE]]| 0|  break
+}   // CHECK:  [[@LINE]]| 0|}
+  } while (0);  // CHECK:  [[@LINE]]| 1|  } while
+  printf("coverage after do is present\n"); // CHECK:  [[@LINE]]| 1|  printf(
+  return 0; // CHECK:  [[@LINE]]| 1|  return
+}   // CHECK:  [[@LINE]]| 1|}
+// clang-format on

``




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[clang] [compiler-rt] [Coverage] Fix mapping for do-while loops with terminating statements (PR #139777)

2025-05-13 Thread via cfe-commits 

llvmbot wrote:



@llvm/pr-subscribers-clang-codegen

@llvm/pr-subscribers-pgo

Author: Justin Cady (justincady)


Changes

The current region mapping for do-while loops that contain statements
such as break or continue results in inaccurate line coverage reports
for the line following the loop.

This change handles terminating statements the same way that other loop
constructs do, correcting the region mapping for accurate reports. It
also fixes a fragile test relying on exact line numbers.

Fixes #139122


---
Full diff: https://github.com/llvm/llvm-project/pull/139777.diff


3 Files Affected:

- (modified) clang/lib/CodeGen/CoverageMappingGen.cpp (+2-3) 
- (modified) clang/test/CoverageMapping/terminate-statements.cpp (+12-1) 
- (added) compiler-rt/test/profile/Linux/coverage-do-while.c (+21) 


``diff
diff --git a/clang/lib/CodeGen/CoverageMappingGen.cpp 
b/clang/lib/CodeGen/CoverageMappingGen.cpp
index 73811d15979d5..6170dc7f59107 100644
--- a/clang/lib/CodeGen/CoverageMappingGen.cpp
+++ b/clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -1703,14 +1703,13 @@ struct CounterCoverageMappingBuilder
 if (!IsCounterEqual(OutCount, ParentCount)) {
   pushRegion(OutCount);
   GapRegionCounter = OutCount;
+  if (BodyHasTerminateStmt)
+HasTerminateStmt = true;
 }
 
 // Create Branch Region around condition.
 if (!llvm::EnableSingleByteCoverage)
   createBranchRegion(S->getCond(), BodyCount, BranchCount.Skipped);
-
-if (BodyHasTerminateStmt)
-  HasTerminateStmt = true;
   }
 
   void VisitForStmt(const ForStmt *S) {
diff --git a/clang/test/CoverageMapping/terminate-statements.cpp 
b/clang/test/CoverageMapping/terminate-statements.cpp
index ef6b6fd82687d..93d655794ccf5 100644
--- a/clang/test/CoverageMapping/terminate-statements.cpp
+++ b/clang/test/CoverageMapping/terminate-statements.cpp
@@ -348,10 +348,20 @@ int elsecondnoret(void) {
 
 // CHECK-LABEL: _Z18statementexprnoretb:
 int statementexprnoret(bool crash) {
-  int rc = ({ if (crash) abort(); 0; }); // CHECK: File 0, 351:35 -> 352:12 = 
(#0 - #1)
+  int rc = ({ if (crash) abort(); 0; }); // CHECK: File 0, [[@LINE]]:35 -> 
[[@LINE+1]]:12 = (#0 - #1)
   return rc; // CHECK-NOT: Gap
 }
 
+// CHECK-LABEL: _Z13do_with_breaki:
+int do_with_break(int n) {
+  do {
+if (n == 87) {
+  break;
+}   // CHECK: File 0, [[@LINE-2]]:18 -> [[@LINE]]:6 = #2
+  } while (0);  // CHECK: File 0, [[@LINE]]:12 -> [[@LINE]]:13 = ((#0 + 
#1) - #2)
+  return 0; // CHECK-NOT: Gap,File 0, [[@LINE-1]]:15
+}
+
 int main() {
   foo(0);
   foo(1);
@@ -375,5 +385,6 @@ int main() {
   abstractcondnoret();
   elsecondnoret();
   statementexprnoret(false);
+  do_with_break(0);
   return 0;
 }
diff --git a/compiler-rt/test/profile/Linux/coverage-do-while.c 
b/compiler-rt/test/profile/Linux/coverage-do-while.c
new file mode 100644
index 0..9e112cbc4c6a3
--- /dev/null
+++ b/compiler-rt/test/profile/Linux/coverage-do-while.c
@@ -0,0 +1,21 @@
+// REQUIRES: lld-available
+// XFAIL: powerpc64-target-arch
+
+// RUN: %clangxx_profgen -fuse-ld=lld -fcoverage-mapping -o %t %s
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
+// RUN: llvm-profdata merge -o %t.profdata %t.profraw
+// RUN: llvm-cov show %t -instr-profile=%t.profdata 2>&1 | FileCheck %s
+
+#include 
+
+// clang-format off
+int main(int argc, char **argv) {   // CHECK:  [[@LINE]]| 1|int main(
+  do {  // CHECK:  [[@LINE]]| 1|  do {
+if (argc == 87) {   // CHECK:  [[@LINE]]| 1|if 
(argc
+  break;// CHECK:  [[@LINE]]| 0|  break
+}   // CHECK:  [[@LINE]]| 0|}
+  } while (0);  // CHECK:  [[@LINE]]| 1|  } while
+  printf("coverage after do is present\n"); // CHECK:  [[@LINE]]| 1|  printf(
+  return 0; // CHECK:  [[@LINE]]| 1|  return
+}   // CHECK:  [[@LINE]]| 1|}
+// clang-format on

``




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[clang] [compiler-rt] [Coverage] Fix mapping for do-while loops with terminating statements (PR #139777)

2025-05-13 Thread Justin Cady via cfe-commits 

https://github.com/justincady ready_for_review 
https://github.com/llvm/llvm-project/pull/139777
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[clang] [compiler-rt] [Coverage] Fix mapping for do-while loops with terminating statements (PR #139777)

2025-05-13 Thread Justin Cady via cfe-commits 

https://github.com/justincady created 
https://github.com/llvm/llvm-project/pull/139777

The current region mapping for do-while loops that contain statements
such as break or continue results in inaccurate line coverage reports
for the line following the loop.

This change handles terminating statements the same way that other loop
constructs do, correcting the region mapping for accurate reports. It
also fixes a fragile test relying on exact line numbers.

Fixes #139122


>From fff85d9cc74e2fbcbf1b2f9c94463070155decd8 Mon Sep 17 00:00:00 2001
From: Justin Cady 
Date: Tue, 13 May 2025 15:08:45 -0400
Subject: [PATCH] [Coverage] Fix mapping for do-while loops with terminating
 statements

The current region mapping for do-while loops that contain statements
such as break or continue results in inaccurate line coverage reports
for the line following the loop.

This change handles terminating statements the same way that other loop
constructs do, correcting the region mapping for accurate reports. It
also fixes a fragile test relying on exact line numbers.

Fixes #139122
---
 clang/lib/CodeGen/CoverageMappingGen.cpp  |  5 ++---
 .../CoverageMapping/terminate-statements.cpp  | 13 +++-
 .../test/profile/Linux/coverage-do-while.c| 21 +++
 3 files changed, 35 insertions(+), 4 deletions(-)
 create mode 100644 compiler-rt/test/profile/Linux/coverage-do-while.c

diff --git a/clang/lib/CodeGen/CoverageMappingGen.cpp 
b/clang/lib/CodeGen/CoverageMappingGen.cpp
index 73811d15979d5..6170dc7f59107 100644
--- a/clang/lib/CodeGen/CoverageMappingGen.cpp
+++ b/clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -1703,14 +1703,13 @@ struct CounterCoverageMappingBuilder
 if (!IsCounterEqual(OutCount, ParentCount)) {
   pushRegion(OutCount);
   GapRegionCounter = OutCount;
+  if (BodyHasTerminateStmt)
+HasTerminateStmt = true;
 }
 
 // Create Branch Region around condition.
 if (!llvm::EnableSingleByteCoverage)
   createBranchRegion(S->getCond(), BodyCount, BranchCount.Skipped);
-
-if (BodyHasTerminateStmt)
-  HasTerminateStmt = true;
   }
 
   void VisitForStmt(const ForStmt *S) {
diff --git a/clang/test/CoverageMapping/terminate-statements.cpp 
b/clang/test/CoverageMapping/terminate-statements.cpp
index ef6b6fd82687d..93d655794ccf5 100644
--- a/clang/test/CoverageMapping/terminate-statements.cpp
+++ b/clang/test/CoverageMapping/terminate-statements.cpp
@@ -348,10 +348,20 @@ int elsecondnoret(void) {
 
 // CHECK-LABEL: _Z18statementexprnoretb:
 int statementexprnoret(bool crash) {
-  int rc = ({ if (crash) abort(); 0; }); // CHECK: File 0, 351:35 -> 352:12 = 
(#0 - #1)
+  int rc = ({ if (crash) abort(); 0; }); // CHECK: File 0, [[@LINE]]:35 -> 
[[@LINE+1]]:12 = (#0 - #1)
   return rc; // CHECK-NOT: Gap
 }
 
+// CHECK-LABEL: _Z13do_with_breaki:
+int do_with_break(int n) {
+  do {
+if (n == 87) {
+  break;
+}   // CHECK: File 0, [[@LINE-2]]:18 -> [[@LINE]]:6 = #2
+  } while (0);  // CHECK: File 0, [[@LINE]]:12 -> [[@LINE]]:13 = ((#0 + 
#1) - #2)
+  return 0; // CHECK-NOT: Gap,File 0, [[@LINE-1]]:15
+}
+
 int main() {
   foo(0);
   foo(1);
@@ -375,5 +385,6 @@ int main() {
   abstractcondnoret();
   elsecondnoret();
   statementexprnoret(false);
+  do_with_break(0);
   return 0;
 }
diff --git a/compiler-rt/test/profile/Linux/coverage-do-while.c 
b/compiler-rt/test/profile/Linux/coverage-do-while.c
new file mode 100644
index 0..9e112cbc4c6a3
--- /dev/null
+++ b/compiler-rt/test/profile/Linux/coverage-do-while.c
@@ -0,0 +1,21 @@
+// REQUIRES: lld-available
+// XFAIL: powerpc64-target-arch
+
+// RUN: %clangxx_profgen -fuse-ld=lld -fcoverage-mapping -o %t %s
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
+// RUN: llvm-profdata merge -o %t.profdata %t.profraw
+// RUN: llvm-cov show %t -instr-profile=%t.profdata 2>&1 | FileCheck %s
+
+#include 
+
+// clang-format off
+int main(int argc, char **argv) {   // CHECK:  [[@LINE]]| 1|int main(
+  do {  // CHECK:  [[@LINE]]| 1|  do {
+if (argc == 87) {   // CHECK:  [[@LINE]]| 1|if 
(argc
+  break;// CHECK:  [[@LINE]]| 0|  break
+}   // CHECK:  [[@LINE]]| 0|}
+  } while (0);  // CHECK:  [[@LINE]]| 1|  } while
+  printf("coverage after do is present\n"); // CHECK:  [[@LINE]]| 1|  printf(
+  return 0; // CHECK:  [[@LINE]]| 1|  return
+}   // CHECK:  [[@LINE]]| 1|}
+// clang-format on

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