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RedBear-OS/local/recipes/dev/libclc/source/clang/test/CodeGenCXX/catch-implicit-integer-truncations.cpp
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vasilito cb424d7448 build: static patch-sanity linter (shift-left the malformed-patch class) 
verify-patch-sanity.py validates every active recipe .patch has internally-
consistent hunk line counts — catching the 'malformed patch at line N' failure
at commit/CI/preflight time instead of hours into a cook. This cycle hit that
class three times (qtwaylandscanner, sddm, xwayland), each only discovered when
cookbook tried to apply the patch.

Running it across the repo found 29 latent malformed patches (validated against
GNU patch: e.g. relibc/P3-sysv-ipc reproduces 'malformed patch at line 22').
They were harmless only because they sit in vendored recipes (baked, not re-
applied) — but would fail on any version-bump re-derivation. --fix recounts the
hunk headers (body untouched) and repaired all 29.

Wired into build-preflight.sh (Phase 1.0D) and redbear-ci.yml, with a unit test
(test-patch-sanity.sh). Skips archived/legacy trees and unvalidatable formats
(empty placeholders, bare-@@ git hunks).
2026-08-01 05:13:02 +03:00

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// RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK
// RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -fno-sanitize-recover=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-SANITIZE
// RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -fsanitize-recover=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-SANITIZE
// RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -fsanitize-trap=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-SANITIZE
extern "C" { // Disable name mangling.
// ========================================================================== //
// Check that explicit cast does not interfere with implicit conversion
// ========================================================================== //
// These contain one implicit truncating conversion, and one explicit truncating cast.
// We want to make sure that we still diagnose the implicit conversion.
// Implicit truncation after explicit truncation.
// CHECK-LABEL: @explicit_cast_interference0
unsigned char explicit_cast_interference0(unsigned int c) {
// CHECK-SANITIZE: %[[ANYEXT:.*]] = zext i8 %[[DST:.*]] to i16, !nosanitize
// CHECK-SANITIZE: call
// CHECK-SANITIZE-NOT: call
// CHECK: }
return (unsigned short)c;
}
// Implicit truncation before explicit truncation.
// CHECK-LABEL: @explicit_cast_interference1
unsigned char explicit_cast_interference1(unsigned int c) {
// CHECK-SANITIZE: %[[ANYEXT:.*]] = zext i16 %[[DST:.*]] to i32, !nosanitize
// CHECK-SANITIZE: call
// CHECK-SANITIZE-NOT: call
// CHECK: }
unsigned short b;
return (unsigned char)(b = c);
}
// ========================================================================== //
// The expected true-negatives.
// ========================================================================== //
// Explicit truncating casts.
// ========================================================================== //
// CHECK-LABEL: @explicit_unsigned_int_to_unsigned_char
unsigned char explicit_unsigned_int_to_unsigned_char(unsigned int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return (unsigned char)src;
}
// CHECK-LABEL: @explicit_signed_int_to_unsigned_char
unsigned char explicit_signed_int_to_unsigned_char(signed int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return (unsigned char)src;
}
// CHECK-LABEL: @explicit_unsigned_int_to_signed_char
signed char explicit_unsigned_int_to_signed_char(unsigned int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return (signed char)src;
}
// CHECK-LABEL: @explicit_signed_int_to_signed_char
signed char explicit_signed_int_to_signed_char(signed int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return (signed char)src;
}
// Explicit NOP casts.
// ========================================================================== //
// CHECK-LABEL: @explicit_unsigned_int_to_unsigned_int
unsigned int explicit_unsigned_int_to_unsigned_int(unsigned int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return (unsigned int)src;
}
// CHECK-LABEL: @explicit_signed_int_to_signed_int
signed int explicit_signed_int_to_signed_int(signed int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return (signed int)src;
}
// CHECK-LABEL: @explicit_unsigned_char_to_signed_char
unsigned char explicit_unsigned_char_to_signed_char(unsigned char src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return (unsigned char)src;
}
// CHECK-LABEL: @explicit_signed_char_to_signed_char
signed char explicit_signed_char_to_signed_char(signed char src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return (signed char)src;
}
// Explicit functional truncating casts.
// ========================================================================== //
using UnsignedChar = unsigned char;
using SignedChar = signed char;
using UnsignedInt = unsigned int;
using SignedInt = signed int;
// CHECK-LABEL: @explicit_functional_unsigned_int_to_unsigned_char
unsigned char explicit_functional_unsigned_int_to_unsigned_char(unsigned int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return UnsignedChar(src);
}
// CHECK-LABEL: @explicit_functional_signed_int_to_unsigned_char
unsigned char explicit_functional_signed_int_to_unsigned_char(signed int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return UnsignedChar(src);
}
// CHECK-LABEL: @explicit_functional_unsigned_int_to_signed_char
signed char explicit_functional_unsigned_int_to_signed_char(unsigned int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return SignedChar(src);
}
// CHECK-LABEL: @explicit_functional_signed_int_to_signed_char
signed char explicit_functional_signed_int_to_signed_char(signed int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return SignedChar(src);
}
// Explicit functional NOP casts.
// ========================================================================== //
// CHECK-LABEL: @explicit_functional_unsigned_int_to_unsigned_int
unsigned int explicit_functional_unsigned_int_to_unsigned_int(unsigned int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return UnsignedInt(src);
}
// CHECK-LABEL: @explicit_functional_signed_int_to_signed_int
signed int explicit_functional_signed_int_to_signed_int(signed int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return SignedInt(src);
}
// CHECK-LABEL: @explicit_functional_unsigned_char_to_signed_char
unsigned char explicit_functional_unsigned_char_to_signed_char(unsigned char src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return UnsignedChar(src);
}
// CHECK-LABEL: @explicit_functional_signed_char_to_signed_char
signed char explicit_functional_signed_char_to_signed_char(signed char src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return SignedChar(src);
}
// Explicit C++-style casts truncating casts.
// ========================================================================== //
// CHECK-LABEL: @explicit_cppstyleunsigned_int_to_unsigned_char
unsigned char explicit_cppstyleunsigned_int_to_unsigned_char(unsigned int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return static_cast<unsigned char>(src);
}
// CHECK-LABEL: @explicit_cppstylesigned_int_to_unsigned_char
unsigned char explicit_cppstylesigned_int_to_unsigned_char(signed int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return static_cast<unsigned char>(src);
}
// CHECK-LABEL: @explicit_cppstyleunsigned_int_to_signed_char
signed char explicit_cppstyleunsigned_int_to_signed_char(unsigned int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return static_cast<signed char>(src);
}
// CHECK-LABEL: @explicit_cppstylesigned_int_to_signed_char
signed char explicit_cppstylesigned_int_to_signed_char(signed int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return static_cast<signed char>(src);
}
// Explicit C++-style casts NOP casts.
// ========================================================================== //
// CHECK-LABEL: @explicit_cppstyleunsigned_int_to_unsigned_int
unsigned int explicit_cppstyleunsigned_int_to_unsigned_int(unsigned int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return static_cast<unsigned int>(src);
}
// CHECK-LABEL: @explicit_cppstylesigned_int_to_signed_int
signed int explicit_cppstylesigned_int_to_signed_int(signed int src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return static_cast<signed int>(src);
}
// CHECK-LABEL: @explicit_cppstyleunsigned_char_to_signed_char
unsigned char explicit_cppstyleunsigned_char_to_signed_char(unsigned char src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return static_cast<unsigned char>(src);
}
// CHECK-LABEL: @explicit_cppstylesigned_char_to_signed_char
signed char explicit_cppstylesigned_char_to_signed_char(signed char src) {
// CHECK-SANITIZE-NOT: call
// CHECK: }
return static_cast<signed char>(src);
}
} // extern "C"
// ---------------------------------------------------------------------------//
// A problematic true-negative involving simple C++ code.
// The problem is tha the NoOp ExplicitCast is directly within MaterializeTemporaryExpr(),
// so a special care is neeeded.
// See https://reviews.llvm.org/D48958#1161345
template <typename a>
a b(a c, const a &d) {
if (d)
;
return c;
}
extern "C" { // Disable name mangling.
// CHECK-LABEL: @false_positive_with_MaterializeTemporaryExpr
int false_positive_with_MaterializeTemporaryExpr() {
// CHECK-SANITIZE-NOT: call{{.*}}ubsan
// CHECK: }
int e = b<unsigned>(4, static_cast<unsigned>(4294967296));
return e;
}
// ---------------------------------------------------------------------------//
} // extern "C"
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