[cfe-commits] r94086 - in /cfe/trunk: lib/Sema/SemaChecking.cpp test/Sema/warn-unreachable.c

[Mike Stump]

Author: mrs
Date: Thu Jan 21 11:31:41 2010
New Revision: 94086

URL: http://llvm.org/viewvc/llvm-project?rev=94086&view=rev
Log:
Improve unreachable code warnings for with respect to compound
assignments.

Modified:
    cfe/trunk/lib/Sema/SemaChecking.cpp
    cfe/trunk/test/Sema/warn-unreachable.c

Modified: cfe/trunk/lib/Sema/SemaChecking.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaChecking.cpp?rev=94086&r1=94085&r2=94086&view=diff

==============================================================================
--- cfe/trunk/lib/Sema/SemaChecking.cpp (original)
+++ cfe/trunk/lib/Sema/SemaChecking.cpp Thu Jan 21 11:31:41 2010
@@ -2102,6 +2102,12 @@
     R1 = UO->getSubExpr()->getSourceRange();
     return UO->getOperatorLoc();
   }
+  case Expr::CompoundAssignOperatorClass: {
+    const CompoundAssignOperator *CAO = cast<CompoundAssignOperator>(S);
+    R1 = CAO->getLHS()->getSourceRange();
+    R2 = CAO->getRHS()->getSourceRange();
+    return CAO->getOperatorLoc();
+  }
   case Stmt::CXXTryStmtClass: {
     return cast<CXXTryStmt>(S)->getHandler(0)->getCatchLoc();
   }

Modified: cfe/trunk/test/Sema/warn-unreachable.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/warn-unreachable.c?rev=94086&r1=94085&r2=94086&view=diff

==============================================================================
--- cfe/trunk/test/Sema/warn-unreachable.c (original)
+++ cfe/trunk/test/Sema/warn-unreachable.c Thu Jan 21 11:31:41 2010
@@ -24,6 +24,7 @@
 }
 
 void test2() {
+  int i;
   switch (live()) {
   case 1:
     halt(),
@@ -78,5 +79,9 @@
       dead();
     -           // expected-warning {{will never be executed}}
       halt();
+  case 8:
+    i
+      +=        // expected-warning {{will never be executed}}
+      halt();
   }
 }