[PATCH] D87347: [NFC] Fix compiler warnings due to integer comparison of different signedness

[Yang Fan via Phabricator via llvm-commits]

nullptr.cpp updated this revision to Diff 290886.
nullptr.cpp added a comment.

[NFC] Fix pessimizing-move warnings due to std::move in return statements

Gcc warning:

  warning: moving a local object in a return statement prevents copy elision [-Wpessimizing-move]
         return std::move(Err);
                             ^

Fix by removing redundant `std::move` in return statements.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D87347/new/

https://reviews.llvm.org/D87347

Files:
  clang/lib/Lex/Pragma.cpp
  llvm/include/llvm/ExecutionEngine/Orc/RPC/RPCUtils.h
  llvm/lib/Analysis/VectorUtils.cpp
  llvm/lib/MC/WasmObjectWriter.cpp
  llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp


Index: llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
===================================================================
--- llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
+++ llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
@@ -2037,8 +2037,7 @@
     if (Mask[i] == UndefMaskElem)
       continue;
     uint64_t LSBIndex = IsBigEndian ? (i + 1) * TruncRatio - 1 : i * TruncRatio;
-    assert(LSBIndex <= std::numeric_limits<int32_t>::max() &&
-           "Overflowed 32-bits");
+    assert(LSBIndex <= INT32_MAX && "Overflowed 32-bits");
     if (Mask[i] != (int)LSBIndex)
       return nullptr;
   }
Index: llvm/lib/MC/WasmObjectWriter.cpp
===================================================================
--- llvm/lib/MC/WasmObjectWriter.cpp
+++ llvm/lib/MC/WasmObjectWriter.cpp
@@ -939,9 +939,8 @@
     if (Segment.InitFlags & wasm::WASM_SEGMENT_HAS_MEMINDEX)
       encodeULEB128(0, W.OS); // memory index
     if ((Segment.InitFlags & wasm::WASM_SEGMENT_IS_PASSIVE) == 0) {
-      W.OS << char(Segment.Offset > std::numeric_limits<int32_t>().max()
-                     ? wasm::WASM_OPCODE_I64_CONST
-                     : wasm::WASM_OPCODE_I32_CONST);
+      W.OS << char(Segment.Offset > INT32_MAX ? wasm::WASM_OPCODE_I64_CONST
+                                              : wasm::WASM_OPCODE_I32_CONST);
       encodeSLEB128(Segment.Offset, W.OS); // offset
       W.OS << char(wasm::WASM_OPCODE_END);
     }
Index: llvm/lib/Analysis/VectorUtils.cpp
===================================================================
--- llvm/lib/Analysis/VectorUtils.cpp
+++ llvm/lib/Analysis/VectorUtils.cpp
@@ -416,8 +416,7 @@
   ScaledMask.clear();
   for (int MaskElt : Mask) {
     if (MaskElt >= 0) {
-      assert(((uint64_t)Scale * MaskElt + (Scale - 1)) <=
-                 std::numeric_limits<int32_t>::max() &&
+      assert(((uint64_t)Scale * MaskElt + (Scale - 1)) <= INT32_MAX &&
              "Overflowed 32-bits");
     }
     for (int SliceElt = 0; SliceElt != Scale; ++SliceElt)
Index: llvm/include/llvm/ExecutionEngine/Orc/RPC/RPCUtils.h
===================================================================
--- llvm/include/llvm/ExecutionEngine/Orc/RPC/RPCUtils.h
+++ llvm/include/llvm/ExecutionEngine/Orc/RPC/RPCUtils.h
@@ -1525,20 +1525,20 @@
             Args...)) {
       detail::ResultTraits<typename Func::ReturnType>::consumeAbandoned(
           std::move(Result));
-      return std::move(Err);
+      return Err;
     }
 
     if (auto Err = this->C.send()) {
       detail::ResultTraits<typename Func::ReturnType>::consumeAbandoned(
           std::move(Result));
-      return std::move(Err);
+      return Err;
     }
 
     while (!ReceivedResponse) {
       if (auto Err = this->handleOne()) {
         detail::ResultTraits<typename Func::ReturnType>::consumeAbandoned(
             std::move(Result));
-        return std::move(Err);
+        return Err;
       }
     }
 
Index: clang/lib/Lex/Pragma.cpp
===================================================================
--- clang/lib/Lex/Pragma.cpp
+++ clang/lib/Lex/Pragma.cpp
@@ -1356,7 +1356,7 @@
         while (Tok.is(tok::numeric_constant)) {
           uint64_t Value;
           if (!PP.parseSimpleIntegerLiteral(Tok, Value) || Value == 0 ||
-              Value > std::numeric_limits<int>::max()) {
+              Value > INT_MAX) {
             PP.Diag(Tok, diag::warn_pragma_warning_expected_number);
             return;
           }


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D87347.290886.patch
Type: text/x-patch
Size: 3463 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20200910/91588f1d/attachment.bin>