[lld] r339083 - [ELF] Use MathExtras.h llvm::SignExtend64

[Fangrui Song via llvm-commits]

Author: maskray
Date: Mon Aug  6 16:50:26 2018
New Revision: 339083

URL: http://llvm.org/viewvc/llvm-project?rev=339083&view=rev
Log:
[ELF] Use MathExtras.h llvm::SignExtend64

Summary: To be consistent with other files where only SignExtend64 is used.

Reviewers: ruiu, espindola

Subscribers: emaste, arichardson, llvm-commits

Differential Revision: https://reviews.llvm.org/D50366

Modified:
    lld/trunk/ELF/Target.h

Modified: lld/trunk/ELF/Target.h
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/Target.h?rev=339083&r1=339082&r2=339083&view=diff
==============================================================================
--- lld/trunk/ELF/Target.h (original)
+++ lld/trunk/ELF/Target.h Mon Aug  6 16:50:26 2018
@@ -13,6 +13,7 @@
 #include "InputSection.h"
 #include "lld/Common/ErrorHandler.h"
 #include "llvm/Object/ELF.h"
+#include "llvm/Support/MathExtras.h"
 
 namespace lld {
 std::string toString(elf::RelType Type);
@@ -189,14 +190,9 @@ static inline void reportRangeError(uint
         Twine(Max).str() + "]" + Hint);
 }
 
-// Sign-extend Nth bit all the way to MSB.
-inline int64_t signExtend(uint64_t V, int N) {
-  return int64_t(V << (64 - N)) >> (64 - N);
-}
-
 // Make sure that V can be represented as an N bit signed integer.
 inline void checkInt(uint8_t *Loc, int64_t V, int N, RelType Type) {
-  if (V != signExtend(V, N))
+  if (V != llvm::SignExtend64(V, N))
     reportRangeError(Loc, Type, Twine(V), llvm::minIntN(N), llvm::maxIntN(N));
 }
 
@@ -210,7 +206,7 @@ inline void checkUInt(uint8_t *Loc, uint
 inline void checkIntUInt(uint8_t *Loc, uint64_t V, int N, RelType Type) {
   // For the error message we should cast V to a signed integer so that error
   // messages show a small negative value rather than an extremely large one
-  if (V != (uint64_t)signExtend(V, N) && (V >> N) != 0)
+  if (V != (uint64_t)llvm::SignExtend64(V, N) && (V >> N) != 0)
     reportRangeError(Loc, Type, Twine((int64_t)V), llvm::minIntN(N),
                      llvm::maxIntN(N));
 }