Control flow analysis for inline assembly.

test/libsolidity/syntaxTests/controlFlow/unreachableCode/assembly/double_revert.sol

@@ -0,0 +1,17 @@
+contract C {
+    function f() public pure {
+        assembly {
+            revert(0, 0)
+            revert(0, 0)
+        }
+    }
+    function g() public pure {
+        assembly {
+            revert(0, 0)
+        }
+        revert();
+    }
+}
+// ----
+// Warning: (100-112): Unreachable code.
+// Warning: (222-230): Unreachable code.

test/libsolidity/syntaxTests/controlFlow/unreachableCode/assembly/for_break.sol

@@ -0,0 +1,13 @@
+contract C {
+    function f() public pure {
+        assembly {
+            for { let a := 0} lt(a,1) { a := add(a, 1) } {
+                break
+                let b := 42
+            }
+        }
+    }
+}
+// ----
+// Warning: (103-117): Unreachable code.
+// Warning: (160-171): Unreachable code.

test/libsolidity/syntaxTests/controlFlow/unreachableCode/assembly/for_continue.sol

@@ -0,0 +1,12 @@
+contract C {
+    function f() public pure {
+        assembly {
+            for { let a := 0} lt(a,1) { a := add(a, 1) } {
+                continue
+                let b := 42
+            }
+        }
+    }
+}
+// ----
+// Warning: (163-174): Unreachable code.

test/libsolidity/syntaxTests/controlFlow/unreachableCode/assembly/return.sol

@@ -0,0 +1,17 @@
+contract C {
+    function f(uint256 y) public pure returns (uint256 x) {
+        assembly {
+            return(0, 0)
+            x := y
+        }
+    }
+    function g(uint256 y) public pure returns (uint256 x) {
+        assembly {
+            return(0, 0)
+        }
+        x = y;
+    }
+}
+// ----
+// Warning: (129-135): Unreachable code.
+// Warning: (274-279): Unreachable code.

test/libsolidity/syntaxTests/controlFlow/unreachableCode/assembly/revert.sol

@@ -0,0 +1,17 @@
+contract C {
+    function f(uint256 y) public pure returns (uint256 x) {
+        assembly {
+            revert(0, 0)
+            x := y
+        }
+    }
+    function g(uint256 y) public pure returns (uint256 x) {
+        assembly {
+            revert(0, 0)
+        }
+        x = y;
+    }
+}
+// ----
+// Warning: (129-135): Unreachable code.
+// Warning: (274-279): Unreachable code.