From 4fcf82f3163f34ddc5c659ceb20e87057a287e10 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Thu, 9 May 2013 15:10:36 +0000
Subject: Avoid runtime type checks.

In most cases the relocation type implies the object word size and
endianness.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181515 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Object/RelocVisitor.h | 54 ++++++++++++++++++++++++++++----------
 1 file changed, 40 insertions(+), 14 deletions(-)

diff --git a/include/llvm/Object/RelocVisitor.h b/include/llvm/Object/RelocVisitor.h
index df21e86..69ce5cf 100644
--- a/include/llvm/Object/RelocVisitor.h
+++ b/include/llvm/Object/RelocVisitor.h
@@ -124,12 +124,37 @@ private:
   StringRef FileFormat;
   bool HasError;
 
-  int64_t getAddend(RelocationRef R) {
+  int64_t getAddend32LE(RelocationRef R) {
+    const ELF32LEObjectFile *Obj = cast<ELF32LEObjectFile>(R.getObjectFile());
+    DataRefImpl DRI = R.getRawDataRefImpl();
     int64_t Addend;
-    getELFRelocationAddend(R, Addend);
+    Obj->getRelocationAddend(DRI, Addend);
+    return Addend;
+  }
+
+  int64_t getAddend64LE(RelocationRef R) {
+    const ELF64LEObjectFile *Obj = cast<ELF64LEObjectFile>(R.getObjectFile());
+    DataRefImpl DRI = R.getRawDataRefImpl();
+    int64_t Addend;
+    Obj->getRelocationAddend(DRI, Addend);
+    return Addend;
+  }
+
+  int64_t getAddend32BE(RelocationRef R) {
+    const ELF32BEObjectFile *Obj = cast<ELF32BEObjectFile>(R.getObjectFile());
+    DataRefImpl DRI = R.getRawDataRefImpl();
+    int64_t Addend;
+    Obj->getRelocationAddend(DRI, Addend);
     return Addend;
   }
 
+  int64_t getAddend64BE(RelocationRef R) {
+    const ELF64BEObjectFile *Obj = cast<ELF64BEObjectFile>(R.getObjectFile());
+    DataRefImpl DRI = R.getRawDataRefImpl();
+    int64_t Addend;
+    Obj->getRelocationAddend(DRI, Addend);
+    return Addend;
+  }
   /// Operations
 
   /// 386-ELF
@@ -140,13 +165,13 @@ private:
   // Ideally the Addend here will be the addend in the data for
   // the relocation. It's not actually the case for Rel relocations.
   RelocToApply visitELF_386_32(RelocationRef R, uint64_t Value) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend = getAddend32LE(R);
     return RelocToApply(Value + Addend, 4);
   }
 
   RelocToApply visitELF_386_PC32(RelocationRef R, uint64_t Value,
                                  uint64_t SecAddr) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend = getAddend32LE(R);
     uint64_t Address;
     R.getOffset(Address);
     return RelocToApply(Value + Addend - Address, 4);
@@ -157,44 +182,45 @@ private:
     return RelocToApply(0, 0);
   }
   RelocToApply visitELF_X86_64_64(RelocationRef R, uint64_t Value) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend = getAddend64LE(R);
     return RelocToApply(Value + Addend, 8);
   }
   RelocToApply visitELF_X86_64_PC32(RelocationRef R, uint64_t Value,
                                     uint64_t SecAddr) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend = getAddend64LE(R);
     uint64_t Address;
     R.getOffset(Address);
     return RelocToApply(Value + Addend - Address, 4);
   }
   RelocToApply visitELF_X86_64_32(RelocationRef R, uint64_t Value) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend = getAddend64LE(R);
     uint32_t Res = (Value + Addend) & 0xFFFFFFFF;
     return RelocToApply(Res, 4);
   }
   RelocToApply visitELF_X86_64_32S(RelocationRef R, uint64_t Value) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend = getAddend64LE(R);
     int32_t Res = (Value + Addend) & 0xFFFFFFFF;
     return RelocToApply(Res, 4);
   }
 
   /// PPC64 ELF
   RelocToApply visitELF_PPC64_ADDR32(RelocationRef R, uint64_t Value) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend = getAddend64BE(R);
     uint32_t Res = (Value + Addend) & 0xFFFFFFFF;
     return RelocToApply(Res, 4);
   }
 
   /// MIPS ELF
   RelocToApply visitELF_MIPS_32(RelocationRef R, uint64_t Value) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend;
+    getELFRelocationAddend(R, Addend);
     uint32_t Res = (Value + Addend) & 0xFFFFFFFF;
     return RelocToApply(Res, 4);
   }
 
   // AArch64 ELF
   RelocToApply visitELF_AARCH64_ABS32(RelocationRef R, uint64_t Value) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend = getAddend64LE(R);
     int64_t Res =  Value + Addend;
 
     // Overflow check allows for both signed and unsigned interpretation.
@@ -205,13 +231,13 @@ private:
   }
 
   RelocToApply visitELF_AARCH64_ABS64(RelocationRef R, uint64_t Value) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend = getAddend64LE(R);
     return RelocToApply(Value + Addend, 8);
   }
 
   // SystemZ ELF
   RelocToApply visitELF_390_32(RelocationRef R, uint64_t Value) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend = getAddend64BE(R);
     int64_t Res = Value + Addend;
 
     // Overflow check allows for both signed and unsigned interpretation.
@@ -222,7 +248,7 @@ private:
   }
 
   RelocToApply visitELF_390_64(RelocationRef R, uint64_t Value) {
-    int64_t Addend = getAddend(R);
+    int64_t Addend = getAddend64BE(R);
     return RelocToApply(Value + Addend, 8);
   }
 };
-- 
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