[BOLT][NFCI] Fix return type of BC::getSignedValueAtAddress

[aaupov]

getSignedValueAtAddress calls DataExtractor::getSigned which naturally
returns a signed value.

Test Plan: NFCI

[llvmbot]

@llvm/pr-subscribers-bolt

Author: Amir Ayupov (aaupov)

Changes

getSignedValueAtAddress calls DataExtractor::getSigned which naturally
returns a signed value.

Test Plan: NFCI

---

Full diff: https://github.com/llvm/llvm-project/pull/91664.diff

3 Files Affected:

• (modified) bolt/include/bolt/Core/BinaryContext.h (+1-2)
• (modified) bolt/lib/Core/BinaryContext.cpp (+1-1)
• (modified) bolt/lib/Rewrite/LinuxKernelRewriter.cpp (+1-1)

diff --git a/bolt/include/bolt/Core/BinaryContext.h b/bolt/include/bolt/Core/BinaryContext.h
index 75765819ac464..4a59a581dfedb 100644
--- a/bolt/include/bolt/Core/BinaryContext.h
+++ b/bolt/include/bolt/Core/BinaryContext.h
@@ -1217,8 +1217,7 @@ class BinaryContext {
 
   /// Return a signed value of \p Size stored at \p Address. The address has
   /// to be a valid statically allocated address for the binary.
-  ErrorOr<uint64_t> getSignedValueAtAddress(uint64_t Address,
-                                            size_t Size) const;
+  ErrorOr<int64_t> getSignedValueAtAddress(uint64_t Address, size_t Size) const;
 
   /// Special case of getUnsignedValueAtAddress() that uses a pointer size.
   ErrorOr<uint64_t> getPointerAtAddress(uint64_t Address) const {
diff --git a/bolt/lib/Core/BinaryContext.cpp b/bolt/lib/Core/BinaryContext.cpp
index ad2eb18caf109..507b203ea9d8b 100644
--- a/bolt/lib/Core/BinaryContext.cpp
+++ b/bolt/lib/Core/BinaryContext.cpp
@@ -2212,7 +2212,7 @@ ErrorOr<uint64_t> BinaryContext::getUnsignedValueAtAddress(uint64_t Address,
   return DE.getUnsigned(&ValueOffset, Size);
 }
 
-ErrorOr<uint64_t> BinaryContext::getSignedValueAtAddress(uint64_t Address,
+ErrorOr<int64_t> BinaryContext::getSignedValueAtAddress(uint64_t Address,
                                                          size_t Size) const {
   const ErrorOr<const BinarySection &> Section = getSectionForAddress(Address);
   if (!Section)
diff --git a/bolt/lib/Rewrite/LinuxKernelRewriter.cpp b/bolt/lib/Rewrite/LinuxKernelRewriter.cpp
index 99775ccfe38d3..b2c8b2446f7e1 100644
--- a/bolt/lib/Rewrite/LinuxKernelRewriter.cpp
+++ b/bolt/lib/Rewrite/LinuxKernelRewriter.cpp
@@ -393,7 +393,7 @@ void LinuxKernelRewriter::processLKKSymtab(bool IsGPL) {
 
   for (uint64_t I = 0; I < SectionSize; I += 4) {
     const uint64_t EntryAddress = SectionAddress + I;
-    ErrorOr<uint64_t> Offset = BC.getSignedValueAtAddress(EntryAddress, 4);
+    ErrorOr<int64_t> Offset = BC.getSignedValueAtAddress(EntryAddress, 4);
     assert(Offset && "Reading valid PC-relative offset for a ksymtab entry");
     const int32_t SignedOffset = *Offset;
     const uint64_t RefAddress = EntryAddress + SignedOffset;

[rafaelauler]

LG