[flang-commits] [clang-tools-extra] [clang] [flang] [llvm] [flang] Add EXECUTE_COMMAND_LINE runtime and lowering intrinsics implementation (PR #74077)

[Yi Wu via flang-commits]

================
@@ -411,6 +412,48 @@ RT_API_ATTRS void ShallowCopy(const Descriptor &to, const Descriptor &from,
     bool toIsContiguous, bool fromIsContiguous);
 RT_API_ATTRS void ShallowCopy(const Descriptor &to, const Descriptor &from);
 
+RT_API_ATTRS const char *EnsureNullTerminated(
+    const char *str, size_t length, Terminator &terminator);
+
+RT_API_ATTRS std::size_t LengthWithoutTrailingSpaces(const Descriptor &d);
+
+// Returns the length of the \p string. Assumes \p string is valid.
+RT_API_ATTRS std::int64_t StringLength(const char *string);
+
+// Assumes Descriptor \p value is not nullptr.
+RT_API_ATTRS bool IsValidCharDescriptor(const Descriptor *value);
+
+// Assumes Descriptor \p intVal is not nullptr.
+RT_API_ATTRS bool IsValidIntDescriptor(const Descriptor *intVal);
+
+// Assume Descriptor \p value is valid: pass IsValidCharDescriptor check.
+RT_API_ATTRS void FillWithSpaces(
+    const Descriptor &value, std::size_t offset = 0);
+
+RT_API_ATTRS std::int32_t CopyToDescriptor(const Descriptor &value,
+    const char *rawValue, std::int64_t rawValueLength, const Descriptor *errmsg,
+    std::size_t offset = 0);
+
+void CopyCharToDescriptor(
+    const Descriptor &value, const char *rawValue, std::size_t offset = 0);
+
+RT_API_ATTRS std::int32_t CheckAndCopyToDescriptor(const Descriptor *value,
+    const char *rawValue, const Descriptor *errmsg, std::size_t &offset);
+
+RT_API_ATTRS void CheckAndCopyCharToDescriptor(
+    const Descriptor *value, const char *rawValue, std::size_t offset = 0);
+
+RT_API_ATTRS void StoreIntToDescriptor(
+    const Descriptor *length, std::int64_t value, Terminator &terminator);
+
+RT_API_ATTRS void CheckAndStoreIntToDescriptor(
+    const Descriptor *intVal, std::int64_t value, Terminator &terminator);
+
+template <int KIND> struct FitsInIntegerKind;
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yi-wu-arm wrote:

check if it can hold a int64, moved back to `command.cpp` since it is only used there.

https://github.com/llvm/llvm-project/pull/74077