Merge pull request #2171 from Smit-create/i-2170

LLVM: Support Unsigned Int in visit_Variable

Author: certik

Diff for: integration_tests/CMakeLists.txt

@@ -573,6 +573,7 @@ RUN(NAME test_unary_op_04    LABELS cpython llvm c) # unary bitinvert
 RUN(NAME test_unary_op_05    LABELS cpython llvm c) # unsigned unary minus, plus
 RUN(NAME test_unary_op_06    LABELS cpython llvm c) # unsigned unary bitnot
 RUN(NAME test_unsigned_01    LABELS cpython llvm c) # unsigned bitshift left, right
+RUN(NAME test_unsigned_02    LABELS cpython llvm c)
 RUN(NAME test_bool_binop     LABELS cpython llvm c)
 RUN(NAME test_issue_518      LABELS cpython llvm c NOFAST)
 RUN(NAME structs_01          LABELS cpython llvm c)

Diff for: integration_tests/test_unsigned_02.py

@@ -0,0 +1,10 @@
+from lpython import u16, i32
+
+# test issue 2170
+
+i : i32
+u : u16 = u16(32768)
+x : i32
+
+for i in range(i32(u)):
+    x = i * 2

Diff for: src/libasr/codegen/asr_to_llvm.cpp

@@ -2375,6 +2375,27 @@ class ASRToLLVMVisitor : public ASR::BaseVisitor<ASRToLLVMVisitor>
                 }
             }
             llvm_symtab[h] = ptr;
+        } else if (x.m_type->type == ASR::ttypeType::UnsignedInteger) {
+            int a_kind = down_cast<ASR::UnsignedInteger_t>(x.m_type)->m_kind;
+            llvm::Type *type;
+            int init_value_bits = 8*a_kind;
+            type = llvm_utils->getIntType(a_kind);
+            llvm::Constant *ptr = module->getOrInsertGlobal(x.m_name,
+                type);
+            if (!external) {
+                if (ASRUtils::is_array(x.m_type)) {
+                    throw CodeGenError("Arrays are not supported by visit_Variable");
+                }
+                if (init_value) {
+                    module->getNamedGlobal(x.m_name)->setInitializer(
+                            init_value);
+                } else {
+                    module->getNamedGlobal(x.m_name)->setInitializer(
+                            llvm::ConstantInt::get(context,
+                                llvm::APInt(init_value_bits, 0)));
+                }
+            }
+            llvm_symtab[h] = ptr;
         } else if (x.m_type->type == ASR::ttypeType::Real) {
             int a_kind = down_cast<ASR::Real_t>(x.m_type)->m_kind;
             llvm::Type *type;