Annotate APInt methods where it's not clear whether they are in place with warn_unused_result.

Fix ScalarEvolution bugs uncovered by this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194928 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 6 deletions

diff --git a/include/llvm/ADT/APSInt.h b/include/llvm/ADT/APSInt.h
index 11be4c513e..ad035a7c30 100644
--- a/include/llvm/ADT/APSInt.h
+++ b/include/llvm/ADT/APSInt.h
@@ -68,18 +68,18 @@ public:
   }
   using APInt::toString;
 
-  APSInt trunc(uint32_t width) const {
+  APSInt LLVM_ATTRIBUTE_UNUSED_RESULT trunc(uint32_t width) const {
     return APSInt(APInt::trunc(width), IsUnsigned);
   }
 
-  APSInt extend(uint32_t width) const {
+  APSInt LLVM_ATTRIBUTE_UNUSED_RESULT extend(uint32_t width) const {
     if (IsUnsigned)
       return APSInt(zext(width), IsUnsigned);
     else
       return APSInt(sext(width), IsUnsigned);
   }
 
-  APSInt extOrTrunc(uint32_t width) const {
+  APSInt LLVM_ATTRIBUTE_UNUSED_RESULT extOrTrunc(uint32_t width) const {
       if (IsUnsigned)
         return APSInt(zextOrTrunc(width), IsUnsigned);
       else
@@ -212,7 +212,7 @@ public:
     assert(IsUnsigned == RHS.IsUnsigned && "Signedness mismatch!");
     return APSInt(static_cast<const APInt&>(*this) & RHS, IsUnsigned);
   }
-  APSInt And(const APSInt& RHS) const {
+  APSInt LLVM_ATTRIBUTE_UNUSED_RESULT And(const APSInt& RHS) const {
     return this->operator&(RHS);
   }
 
@@ -220,7 +220,7 @@ public:
     assert(IsUnsigned == RHS.IsUnsigned && "Signedness mismatch!");
     return APSInt(static_cast<const APInt&>(*this) | RHS, IsUnsigned);
   }
-  APSInt Or(const APSInt& RHS) const {
+  APSInt LLVM_ATTRIBUTE_UNUSED_RESULT Or(const APSInt& RHS) const {
     return this->operator|(RHS);
   }
 
@@ -229,7 +229,7 @@ public:
     assert(IsUnsigned == RHS.IsUnsigned && "Signedness mismatch!");
     return APSInt(static_cast<const APInt&>(*this) ^ RHS, IsUnsigned);
   }
-  APSInt Xor(const APSInt& RHS) const {
+  APSInt LLVM_ATTRIBUTE_UNUSED_RESULT Xor(const APSInt& RHS) const {
     return this->operator^(RHS);
   }