Zero initialize memory arrays

test/cmdlineTests/standard_ir_requested/output.json

@@ -20,6 +20,7 @@ object \"C_6\" {
 
         function fun_f_5()  {
 
+
         }
 
     }
@@ -69,6 +70,7 @@ object \"C_6\" {
 
             function fun_f_5()  {
 
+
             }
 
             function shift_right_224_unsigned(value) -> newValue {

test/cmdlineTests/yul_string_format_ascii/output.json

@@ -35,11 +35,18 @@ object \"C_10\" {
         }
 
         function fun_f_9()  -> vloc__4_mpos {
+            let zero_value_for_type_t_string_memory_ptr_1_mpos := zero_value_for_split_t_string_memory_ptr()
+            vloc__4_mpos := zero_value_for_type_t_string_memory_ptr_1_mpos
+
             vloc__4_mpos := convert_t_stringliteral_9f0adad0a59b05d2e04a1373342b10b9eb16c57c164c8a3bfcbf46dccee39a21_to_t_string_memory_ptr()
             leave
 
         }
 
+        function zero_value_for_split_t_string_memory_ptr() -> ret {
+            ret := 96
+        }
+
     }
     object \"C_10_deployed\" {
         code {
@@ -131,6 +138,9 @@ object \"C_10\" {
             }
 
             function fun_f_9()  -> vloc__4_mpos {
+                let zero_value_for_type_t_string_memory_ptr_1_mpos := zero_value_for_split_t_string_memory_ptr()
+                vloc__4_mpos := zero_value_for_type_t_string_memory_ptr_1_mpos
+
                 vloc__4_mpos := convert_t_stringliteral_9f0adad0a59b05d2e04a1373342b10b9eb16c57c164c8a3bfcbf46dccee39a21_to_t_string_memory_ptr()
                 leave
 
@@ -147,6 +157,10 @@ object \"C_10\" {
 
             }
 
+            function zero_value_for_split_t_string_memory_ptr() -> ret {
+                ret := 96
+            }
+
         }
     }
 }

test/cmdlineTests/yul_string_format_ascii_bytes32/output.json

@@ -23,11 +23,18 @@ object \"C_10\" {
         }
 
         function fun_f_9()  -> vloc__4 {
+            let zero_value_for_type_t_bytes32_1 := zero_value_for_split_t_bytes32()
+            vloc__4 := zero_value_for_type_t_bytes32_1
+
             vloc__4 := convert_t_stringliteral_9f0adad0a59b05d2e04a1373342b10b9eb16c57c164c8a3bfcbf46dccee39a21_to_t_bytes32()
             leave
 
         }
 
+        function zero_value_for_split_t_bytes32() -> ret {
+            ret := 0
+        }
+
     }
     object \"C_10_deployed\" {
         code {
@@ -88,6 +95,9 @@ object \"C_10\" {
             }
 
             function fun_f_9()  -> vloc__4 {
+                let zero_value_for_type_t_bytes32_1 := zero_value_for_split_t_bytes32()
+                vloc__4 := zero_value_for_type_t_bytes32_1
+
                 vloc__4 := convert_t_stringliteral_9f0adad0a59b05d2e04a1373342b10b9eb16c57c164c8a3bfcbf46dccee39a21_to_t_bytes32()
                 leave
 
@@ -100,6 +110,10 @@ object \"C_10\" {
 
             }
 
+            function zero_value_for_split_t_bytes32() -> ret {
+                ret := 0
+            }
+
         }
     }
 }

test/cmdlineTests/yul_string_format_ascii_bytes32_from_number/output.json

@@ -27,6 +27,9 @@ object \"C_10\" {
         }
 
         function fun_f_9()  -> vloc__4 {
+            let zero_value_for_type_t_bytes4_1 := zero_value_for_split_t_bytes4()
+            vloc__4 := zero_value_for_type_t_bytes4_1
+
             let expr_6 := 0x61626364
             vloc__4 := convert_t_rational_1633837924_by_1_to_t_bytes4(expr_6)
             leave
@@ -40,6 +43,10 @@ object \"C_10\" {
 
         }
 
+        function zero_value_for_split_t_bytes4() -> ret {
+            ret := 0
+        }
+
     }
     object \"C_10_deployed\" {
         code {
@@ -104,6 +111,9 @@ object \"C_10\" {
             }
 
             function fun_f_9()  -> vloc__4 {
+                let zero_value_for_type_t_bytes4_1 := zero_value_for_split_t_bytes4()
+                vloc__4 := zero_value_for_type_t_bytes4_1
+
                 let expr_6 := 0x61626364
                 vloc__4 := convert_t_rational_1633837924_by_1_to_t_bytes4(expr_6)
                 leave
@@ -124,6 +134,10 @@ object \"C_10\" {
 
             }
 
+            function zero_value_for_split_t_bytes4() -> ret {
+                ret := 0
+            }
+
         }
     }
 }

test/cmdlineTests/yul_string_format_ascii_long/output.json

@@ -39,11 +39,18 @@ object \"C_10\" {
         }
 
         function fun_f_9()  -> vloc__4_mpos {
+            let zero_value_for_type_t_string_memory_ptr_1_mpos := zero_value_for_split_t_string_memory_ptr()
+            vloc__4_mpos := zero_value_for_type_t_string_memory_ptr_1_mpos
+
             vloc__4_mpos := convert_t_stringliteral_d6604f85ac07e2b33103a620b3d3d75b0473c7214912beded67b9b624d41c571_to_t_string_memory_ptr()
             leave
 
         }
 
+        function zero_value_for_split_t_string_memory_ptr() -> ret {
+            ret := 96
+        }
+
     }
     object \"C_10_deployed\" {
         code {
@@ -139,6 +146,9 @@ object \"C_10\" {
             }
 
             function fun_f_9()  -> vloc__4_mpos {
+                let zero_value_for_type_t_string_memory_ptr_1_mpos := zero_value_for_split_t_string_memory_ptr()
+                vloc__4_mpos := zero_value_for_type_t_string_memory_ptr_1_mpos
+
                 vloc__4_mpos := convert_t_stringliteral_d6604f85ac07e2b33103a620b3d3d75b0473c7214912beded67b9b624d41c571_to_t_string_memory_ptr()
                 leave
 
@@ -155,6 +165,10 @@ object \"C_10\" {
 
             }
 
+            function zero_value_for_split_t_string_memory_ptr() -> ret {
+                ret := 96
+            }
+
         }
     }
 }

test/cmdlineTests/yul_string_format_hex/output.json

@@ -27,6 +27,9 @@ object \"C_10\" {
         }
 
         function fun_f_9()  -> vloc__4 {
+            let zero_value_for_type_t_bytes4_1 := zero_value_for_split_t_bytes4()
+            vloc__4 := zero_value_for_type_t_bytes4_1
+
             let expr_6 := 0xaabbccdd
             vloc__4 := convert_t_rational_2864434397_by_1_to_t_bytes4(expr_6)
             leave
@@ -40,6 +43,10 @@ object \"C_10\" {
 
         }
 
+        function zero_value_for_split_t_bytes4() -> ret {
+            ret := 0
+        }
+
     }
     object \"C_10_deployed\" {
         code {
@@ -104,6 +111,9 @@ object \"C_10\" {
             }
 
             function fun_f_9()  -> vloc__4 {
+                let zero_value_for_type_t_bytes4_1 := zero_value_for_split_t_bytes4()
+                vloc__4 := zero_value_for_type_t_bytes4_1
+
                 let expr_6 := 0xaabbccdd
                 vloc__4 := convert_t_rational_2864434397_by_1_to_t_bytes4(expr_6)
                 leave
@@ -124,6 +134,10 @@ object \"C_10\" {
 
             }
 
+            function zero_value_for_split_t_bytes4() -> ret {
+                ret := 0
+            }
+
         }
     }
 }

test/libsolidity/semanticTests/viaYul/array_function_pointers.sol

@@ -0,0 +1,29 @@
+contract C {
+	function f(uint n, uint m) public {
+		function() internal returns (uint)[] memory arr = new function() internal returns (uint)[](n);
+		arr[m]();
+	}
+	function f2(uint n, uint m, uint a, uint b) public {
+		function() internal returns (uint)[][] memory arr = new function() internal returns (uint)[][](n);
+		for (uint i = 0; i < n; ++i)
+			arr[i] = new function() internal returns (uint)[](m);
+		arr[a][b]();
+	}
+	function g(uint n, uint m) public {
+		function() external returns (uint)[] memory arr = new function() external returns (uint)[](n);
+		arr[m]();
+	}
+	function g2(uint n, uint m, uint a, uint b) public {
+		function() external returns (uint)[][] memory arr = new function() external returns (uint)[][](n);
+		for (uint i = 0; i < n; ++i)
+			arr[i] = new function() external returns (uint)[](m);
+		arr[a][b]();
+	}
+}
+// ====
+// compileViaYul: also
+// ----
+// f(uint256,uint256): 1823621, 12323 -> FAILURE
+// f2(uint256,uint256,uint256,uint256): 18723921, 1823621, 123, 12323 -> FAILURE
+// g(uint256,uint256): 1823621, 12323 -> FAILURE
+// g2(uint256,uint256,uint256,uint256): 18723921, 1823621, 123, 12323 -> FAILURE

test/libsolidity/semanticTests/viaYul/array_memory_allocation/array_2d_zeroed_memory_index_access.sol

@@ -0,0 +1,24 @@
+contract C {
+	uint test1;
+	uint test2;
+	uint test3;
+	uint test4;
+	uint test5;
+	uint test6;
+	uint test7;
+	mapping (string => uint) map;
+	function set(string memory s, uint n, uint m, uint a, uint b) public returns (uint) {
+		map[s] = 0;
+		uint[][] memory x = new uint[][](n);
+		for (uint i = 0; i < n; ++i)
+			x[i] = new uint[](m);
+		return x[a][b];
+	}
+}
+// ====
+// compileViaYul: also
+// ----
+// set(string,uint256,uint256,uint256,uint256): 0xa0, 2, 4, 0, 0, 32, "01234567890123456789012345678901" -> 0
+// set(string,uint256,uint256,uint256,uint256): 0xa0, 2, 4, 1, 3, 32, "01234567890123456789012345678901" -> 0
+// set(string,uint256,uint256,uint256,uint256): 0xa0, 2, 4, 3, 3, 32, "01234567890123456789012345678901" -> FAILURE
+// set(string,uint256,uint256,uint256,uint256): 0xa0, 2, 4, 1, 5, 32, "01234567890123456789012345678901" -> FAILURE

test/libsolidity/semanticTests/viaYul/array_memory_allocation/array_array_static.sol

@@ -0,0 +1,22 @@
+contract C {
+	uint test1;
+	uint test2;
+	uint test3;
+	uint test4;
+	uint test5;
+	uint test6;
+	uint test7;
+	mapping (string => uint) map;
+	function set(string memory s, uint n, uint m) public returns (uint) {
+		map[s] = 0;
+		uint[4][] memory x = new uint[4][](n);
+		return x[m][0];
+	}
+}
+// ====
+// compileViaYul: also
+// ----
+// set(string,uint256,uint256): 0x60, 2, 0, 32, "01234567890123456789012345678901" -> 0
+// set(string,uint256,uint256): 0x60, 2, 1, 32, "01234567890123456789012345678901" -> 0
+// set(string,uint256,uint256): 0x60, 2, 2, 32, "01234567890123456789012345678901" -> FAILURE
+// set(string,uint256,uint256): 0x60, 200, 199, 32, "01234567890123456789012345678901" -> 0

test/libsolidity/semanticTests/viaYul/array_memory_allocation/array_static_return_param_zeroed_memory_index_access.sol

@@ -0,0 +1,17 @@
+contract C {
+	uint test1;
+	uint test2;
+	uint test3;
+	uint test4;
+	uint test5;
+	uint test6;
+	uint test7;
+	mapping (string => uint) map;
+	function set(string memory s) public returns (uint[3] memory x, uint[2] memory y, uint[] memory z, uint t) {
+		map[s] = 0;
+	}
+}
+// ====
+// compileViaYul: also
+// ----
+// set(string): 0x20, 32, "01234567890123456789012345678901" -> 0, 0, 0, 0, 0, 0xe0, 0, 0

test/libsolidity/semanticTests/viaYul/array_memory_allocation/array_static_zeroed_memory_index_access.sol

@@ -0,0 +1,19 @@
+contract C {
+	uint test1;
+	uint test2;
+	uint test3;
+	uint test4;
+	uint test5;
+	uint test6;
+	uint test7;
+	mapping (string => uint) map;
+	function set(string memory s) public returns (uint) {
+		map[s] = 0;
+		uint[3] memory x;
+		return x[2];
+	}
+}
+// ====
+// compileViaYul: also
+// ----
+// set(string): 0x20, 32, "01234567890123456789012345678901" -> 0

test/libsolidity/semanticTests/viaYul/array_memory_allocation/array_zeroed_memory_index_access.sol

@@ -0,0 +1,22 @@
+contract C {
+	uint test1;
+	uint test2;
+	uint test3;
+	uint test4;
+	uint test5;
+	uint test6;
+	uint test7;
+	mapping (string => uint) map;
+	function set(string memory s, uint n, uint a) public returns (uint) {
+		map[s] = 0;
+		uint[] memory x = new uint[](n);
+		return x[a];
+	}
+}
+// ====
+// compileViaYul: also
+// ----
+// set(string,uint256,uint256): 0x60, 5, 0, 32, "01234567890123456789012345678901" -> 0
+// set(string,uint256,uint256): 0x60, 5, 1, 32, "01234567890123456789012345678901" -> 0
+// set(string,uint256,uint256): 0x60, 5, 4, 32, "01234567890123456789012345678901" -> 0
+// set(string,uint256,uint256): 0x60, 5, 5, 32, "01234567890123456789012345678901" -> FAILURE

test/libsolidity/semanticTests/viaYul/function_pointers.sol

@@ -0,0 +1,25 @@
+contract C {
+	function f() public {
+		function() internal returns (uint) _f;
+		_f();
+	}
+	function g() public {
+		function() external returns (uint) _g;
+		_g();
+	}
+	function h1() internal returns (function() internal returns (uint) _h) {}
+	function h2() public {
+		h1()();
+	}
+	function k1() internal returns (function() external returns (uint) _k) {}
+	function k2() public {
+		k1()();
+	}
+}
+// ====
+// compileViaYul: also
+// ----
+// f() -> FAILURE
+// g() -> FAILURE
+// h2() -> FAILURE
+// k2() -> FAILURE

test/libsolidity/semanticTests/viaYul/return_storage_pointers.sol

@@ -0,0 +1,16 @@
+contract C {
+	uint[] arr1;
+	uint[][] arr2;
+	function f() internal returns (uint[] storage ptr1, uint[][] storage ptr2) {
+		ptr1 = arr1;
+		ptr2 = arr2;
+	}
+	function g() public returns (uint, uint) {
+		return (arr1.length, arr2.length);
+	}
+
+}
+// ====
+// compileViaYul: also
+// ----
+// g() -> 0, 0