wipAdd VM Version Paris and new built in function `prevrandaoAdd VM Version Paris and new built in function prevrandao`

test/libsolidity/semanticTests/inlineAssembly/prevrandao_pre_paris_function.sol

@@ -0,0 +1,21 @@
+contract C {
+    function f() public view returns (uint ret) {
+        assembly {
+            let prevrandao := sload(0)
+            ret := prevrandao
+        }
+    }
+    function g() public pure returns (uint ret) {
+        assembly {
+            function prevrandao() -> r {
+                r := 1000
+            }
+            ret := prevrandao()
+        }
+    }
+}
+// ====
+// EVMVersion: <paris
+// ----
+// f() -> 0
+// g() -> 1000

test/libsolidity/syntaxTests/inlineAssembly/difficulty_nowarn_pre_paris.sol

@@ -0,0 +1,6 @@
+function f() view returns (uint) {
+    return block.difficulty;
+}
+// ====
+// EVMVersion: <paris
+// ----

test/libsolidity/syntaxTests/inlineAssembly/difficulty_reserved.sol

@@ -0,0 +1,18 @@
+contract C {
+    function f() public view returns (uint ret) {
+        assembly {
+            let difficulty := sload(0)
+            ret := difficulty
+        }
+    }
+    function g() public pure returns (uint ret) {
+        assembly {
+            function difficulty() -> r {
+                r := 1000
+            }
+            ret := difficulty()
+        }
+    }
+}
+// ----
+// ParserError 5568: (98-108): Cannot use builtin function name "difficulty" as identifier name.

test/libsolidity/syntaxTests/inlineAssembly/difficulty_warn_paris.sol

@@ -0,0 +1,7 @@
+function f() view returns (uint) {
+    return block.difficulty;
+}
+// ====
+// EVMVersion: >=paris
+// ----
+// Warning 8417: (43-59): "difficulty" was renamed and supplanted by "prevrandao" in the VM version paris.

test/libsolidity/syntaxTests/inlineAssembly/prevrandao_nowarn_paris.sol

@@ -0,0 +1,6 @@
+function f() view returns (uint) {
+    return block.prevrandao;
+}
+// ====
+// EVMVersion: >=paris
+// ----

test/libsolidity/syntaxTests/inlineAssembly/prevrandao_reserved_paris.sol

@@ -0,0 +1,20 @@
+contract C {
+    function f() public view returns (uint ret) {
+        assembly {
+            let prevrandao := sload(0)
+            ret := prevrandao
+        }
+    }
+    function g() public pure returns (uint ret) {
+        assembly {
+            function prevrandao() -> r {
+                r := 1000
+            }
+            ret := prevrandao()
+        }
+    }
+}
+// ====
+// EVMVersion: >=paris
+// ----
+// ParserError 5568: (98-108): Cannot use builtin function name "prevrandao" as identifier name.

test/libsolidity/syntaxTests/inlineAssembly/prevrandao_warn_pre_paris.sol

@@ -0,0 +1,7 @@
+function f() view returns (uint) {
+    return block.prevrandao;
+}
+// ====
+// EVMVersion: <paris
+// ----
+// Warning 9432: (43-59): "prevrandao" is not supported by the VM version and will be treated like "difficulty".

test/libsolidity/syntaxTests/types/magic_block_istanbul.sol

@@ -2,9 +2,6 @@ contract C {
     function f() public view returns (address payable) {
         return block.coinbase;
     }
-    function g() public view returns (uint) {
-        return block.difficulty;
-    }
     function h() public view returns (uint) {
         return block.gaslimit;
     }

test/libsolidity/syntaxTests/viewPureChecker/inline_assembly_instructions_allowed_pure.sol

@@ -74,6 +74,7 @@ contract C {
             //pop(timestamp())
             //pop(number())
             //pop(difficulty())
+            //pop(prevrandao())
             //pop(gaslimit())
 
             // NOTE: msize() is allowed only with optimizer disabled

test/libsolidity/syntaxTests/viewPureChecker/inline_assembly_instructions_allowed_view.sol

@@ -73,7 +73,7 @@ contract C {
             pop(coinbase())
             pop(timestamp())
             pop(number())
-            pop(difficulty())
+            pop(prevrandao())
             pop(gaslimit())
 
             // NOTE: msize() is allowed only with optimizer disabled
@@ -83,7 +83,7 @@ contract C {
     }
 }
 // ====
-// EVMVersion: >=london
+// EVMVersion: >=paris
 // ----
 // Warning 5740: (94-1733): Unreachable code.
 // Warning 5740: (1746-1758): Unreachable code.

test/libsolidity/syntaxTests/viewPureChecker/inline_assembly_instructions_allowed_view_london.sol

@@ -0,0 +1,15 @@
+contract C {
+    function f() public view {
+        assembly {
+            // Renamed in paris
+            pop(difficulty())
+        }
+    }
+}
+// ====
+// EVMVersion: =london
+// ----
+// Warning 5740: (94-1733): Unreachable code.
+// Warning 5740: (1746-1758): Unreachable code.
+// Warning 5740: (1801-1810): Unreachable code.
+// Warning 5740: (1978-2244): Unreachable code.

test/libsolidity/syntaxTests/viewPureChecker/inline_assembly_instructions_disallowed_pure.sol

@@ -32,7 +32,7 @@ contract C {
             pop(coinbase())
             pop(timestamp())
             pop(number())
-            pop(difficulty())
+            pop(prevrandao())
             pop(gaslimit())
 
             // These two are disallowed too but the error suppresses other errors.
@@ -42,7 +42,7 @@ contract C {
     }
 }
 // ====
-// EVMVersion: >=london
+// EVMVersion: >=paris
 // ----
 // Warning 5740: (672-1083): Unreachable code.
 // TypeError 2527: (79-87): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".

test/libsolidity/syntaxTests/viewPureChecker/inline_assembly_instructions_disallowed_pure_london.sol

@@ -0,0 +1,45 @@
+contract C {
+    function f() public pure {
+        assembly {
+            // Renamed in paris
+            pop(difficulty())
+        }
+    }
+}
+// ====
+// EVMVersion: =london
+// ----
+// Warning 5740: (672-1083): Unreachable code.
+// TypeError 2527: (79-87): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 8961: (101-113): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 2527: (130-135): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (153-162): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (180-190): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (208-221): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (239-247): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (265-276): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (294-308): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (322-345): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (362-376): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 8961: (394-409): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 8961: (427-446): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 8961: (464-489): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 8961: (507-536): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 8961: (554-584): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 2527: (602-630): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 8961: (644-659): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 8961: (672-682): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 8961: (695-708): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 8961: (721-737): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 8961: (750-769): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 8961: (782-804): Function cannot be declared as pure because this expression (potentially) modifies the state.
+// TypeError 2527: (821-830): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (848-857): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (875-883): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (901-911): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (929-941): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (959-969): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (987-998): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (1016-1024): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (1042-1054): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".
+// TypeError 2527: (1072-1082): Function declared as pure, but this expression (potentially) reads from the environment or state and thus requires "view".