https://github.com/AmrDeveloper updated
https://github.com/llvm/llvm-project/pull/138592
>From af3e49f1290c61d5856a5ddf600cfd19ef485e25 Mon Sep 17 00:00:00 2001
From: AmrDeveloper <am...@programmer.net>
Date: Mon, 5 May 2025 23:01:02 +0200
Subject: [PATCH 1/3] [clang][OpenMP] Add error for large expr in collapse
---
clang/docs/ReleaseNotes.rst | 2 ++
clang/include/clang/Basic/DiagnosticSemaKinds.td | 2 ++
clang/lib/Sema/SemaOpenMP.cpp | 7 +++++++
clang/test/OpenMP/simd_collapse_messages.cpp | 4 ++++
4 files changed, 15 insertions(+)
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 7f68fd877e4e2..6ff63e8ffe012 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -510,6 +510,8 @@ Improvements to Clang's diagnostics
- Several compatibility diagnostics that were incorrectly being grouped under
``-Wpre-c++20-compat`` are now part of ``-Wc++20-compat``. (#GH138775)
+- An error is now emitted when OpenMP ``collapse`` and ``ordered`` clauses has
expression larger than 64 bit.
+
Improvements to Clang's time-trace
----------------------------------
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td
b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index e1b9ed0647bb9..cf6990ff6f3c1 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -11523,6 +11523,8 @@ def note_omp_collapse_ordered_expr : Note<
"as specified in %select{'collapse'|'ordered'|'collapse' and 'ordered'}0
clause%select{||s}0">;
def err_omp_negative_expression_in_clause : Error<
"argument to '%0' clause must be a %select{non-negative|strictly positive}1
integer value">;
+def err_omp_large_expression_in_clause : Error<
+ "argument to '%0' clause cannot have more than 64 bits size">;
def err_omp_not_integral : Error<
"expression must have integral or unscoped enumeration "
"type, not %0">;
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 835dba22a858d..52cb5b1fb5d71 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -15901,6 +15901,13 @@ ExprResult
SemaOpenMP::VerifyPositiveIntegerConstantInClause(
<< E->getSourceRange();
return ExprError();
}
+
+ if (!Result.isRepresentableByInt64()) {
+ Diag(E->getExprLoc(), diag::err_omp_large_expression_in_clause)
+ << getOpenMPClauseNameForDiag(CKind) << E->getSourceRange();
+ return ExprError();
+ }
+
if (CKind == OMPC_collapse && DSAStack->getAssociatedLoops() == 1)
DSAStack->setAssociatedLoops(Result.getExtValue());
else if (CKind == OMPC_ordered)
diff --git a/clang/test/OpenMP/simd_collapse_messages.cpp
b/clang/test/OpenMP/simd_collapse_messages.cpp
index 1ce3bef3535ce..135b48eea739a 100644
--- a/clang/test/OpenMP/simd_collapse_messages.cpp
+++ b/clang/test/OpenMP/simd_collapse_messages.cpp
@@ -43,6 +43,10 @@ T tmain(T argc, S **argv) {
for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
#pragma omp simd collapse (S) // expected-error {{'S' does not refer to a
value}}
for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
+ #pragma omp for collapse (0xFFFFFFFFFFFFFFFF) // expected-error {{argument
to 'collapse' clause cannot have more than 64 bits size}}
+ for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
+ #pragma omp simd collapse (0xFFFFFFFFFFFFFFFF) // expected-error {{argument
to 'collapse' clause cannot have more than 64 bits size}}
+ for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
#if __cplusplus <= 199711L
// expected-error@+4 2 {{integral constant expression}} expected-note@+4
0+{{constant expression}}
#else
>From 458a9d8cd4e3f5aaf70356517df17932e2b61224 Mon Sep 17 00:00:00 2001
From: AmrDeveloper <am...@programmer.net>
Date: Wed, 7 May 2025 21:50:46 +0200
Subject: [PATCH 2/3] Add more test cases
---
clang/test/OpenMP/for_collapse_messages.cpp | 2 ++
clang/test/OpenMP/for_simd_collapse_messages.cpp | 2 ++
clang/test/OpenMP/simd_collapse_messages.cpp | 2 --
3 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/clang/test/OpenMP/for_collapse_messages.cpp
b/clang/test/OpenMP/for_collapse_messages.cpp
index 07630ffaaed95..aacf6cb34724a 100644
--- a/clang/test/OpenMP/for_collapse_messages.cpp
+++ b/clang/test/OpenMP/for_collapse_messages.cpp
@@ -49,6 +49,8 @@ T tmain(T argc, S **argv) {
for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
#pragma omp for collapse (S) // expected-error {{'S' does not refer to a
value}}
for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
+ #pragma omp for collapse (0xFFFFFFFFFFFFFFFF) // expected-error {{argument
to 'collapse' clause cannot have more than 64 bits size}}
+ for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
#if __cplusplus <= 199711L
// expected-error@+4 2 {{integral constant expression}} expected-note@+4
0+{{constant expression}}
#else
diff --git a/clang/test/OpenMP/for_simd_collapse_messages.cpp
b/clang/test/OpenMP/for_simd_collapse_messages.cpp
index d9f8a2d971518..d996e6545c0a9 100644
--- a/clang/test/OpenMP/for_simd_collapse_messages.cpp
+++ b/clang/test/OpenMP/for_simd_collapse_messages.cpp
@@ -43,6 +43,8 @@ T tmain(T argc, S **argv) {
for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
#pragma omp for simd collapse (S) // expected-error {{'S' does not refer to
a value}}
for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
+ #pragma omp for simd collapse (0xFFFFFFFFFFFFFFFF) // expected-error
{{argument to 'collapse' clause cannot have more than 64 bits size}}
+ for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
#if __cplusplus <= 199711L
// expected-error@+4 2 {{integral constant expression}} expected-note@+4
0+{{constant expression}}
#else
diff --git a/clang/test/OpenMP/simd_collapse_messages.cpp
b/clang/test/OpenMP/simd_collapse_messages.cpp
index 135b48eea739a..3ae0a818284e9 100644
--- a/clang/test/OpenMP/simd_collapse_messages.cpp
+++ b/clang/test/OpenMP/simd_collapse_messages.cpp
@@ -43,8 +43,6 @@ T tmain(T argc, S **argv) {
for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
#pragma omp simd collapse (S) // expected-error {{'S' does not refer to a
value}}
for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
- #pragma omp for collapse (0xFFFFFFFFFFFFFFFF) // expected-error {{argument
to 'collapse' clause cannot have more than 64 bits size}}
- for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
#pragma omp simd collapse (0xFFFFFFFFFFFFFFFF) // expected-error {{argument
to 'collapse' clause cannot have more than 64 bits size}}
for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
#if __cplusplus <= 199711L
>From dc940a3fb7b686f79b87829f288276486d386612 Mon Sep 17 00:00:00 2001
From: AmrDeveloper <am...@programmer.net>
Date: Thu, 8 May 2025 18:30:41 +0200
Subject: [PATCH 3/3] Add test cases for omp ordered
---
clang/test/OpenMP/for_ordered_clause.cpp | 3 +++
clang/test/OpenMP/for_simd_loop_messages.cpp | 3 +++
2 files changed, 6 insertions(+)
diff --git a/clang/test/OpenMP/for_ordered_clause.cpp
b/clang/test/OpenMP/for_ordered_clause.cpp
index d9dbb828f6452..40a219953d7a3 100644
--- a/clang/test/OpenMP/for_ordered_clause.cpp
+++ b/clang/test/OpenMP/for_ordered_clause.cpp
@@ -53,6 +53,9 @@ T tmain(T argc, S **argv) {
#pragma omp for ordered(S) // expected-error {{'S' does not refer to a value}}
for (int i = ST; i < N; i++)
argv[0][i] = argv[0][i] - argv[0][i - ST];
+#pragma omp for ordered (0xFFFFFFFFFFFFFFFF) // expected-error {{argument to
'ordered' clause cannot have more than 64 bits size}}
+ for (int i = ST; i < N; i++)
+ argv[0][i] = argv[0][i] - argv[0][i-ST];
#if __cplusplus <= 199711L
// expected-error@+4 2 {{integral constant expression}} expected-note@+4
0+{{constant expression}}
#else
diff --git a/clang/test/OpenMP/for_simd_loop_messages.cpp
b/clang/test/OpenMP/for_simd_loop_messages.cpp
index 74a52f3f5d694..9d6c45614a257 100644
--- a/clang/test/OpenMP/for_simd_loop_messages.cpp
+++ b/clang/test/OpenMP/for_simd_loop_messages.cpp
@@ -735,6 +735,9 @@ void test_ordered() {
#pragma omp for simd ordered(1)
for (int i = 0; i < 16; ++i)
;
+#pragma omp for simd ordered (0xFFFFFFFFFFFFFFFF) // expected-error {{argument
to 'ordered' clause cannot have more than 64 bits size}}
+ for (int i = 0; i < 10; i++)
+ ;
}
void test_nowait() {
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