[JITLink][COFF][x86_64] Implement remaining IMAGE_REL_AMD64_REL32_*.

[sunho]

Summary

Implements remaining IMAGE_REL_AMD64_REL32_*. We only need IMAGE_REL_AMD64_REL32_4 for now but doing all remaining ones for completeness. (clang only uses IMAGE_REL_AMD64_REL32_1 and IMAGE_REL_AMD64_REL32)

[lhames]

Are there test cases for this already? Can some be added?

Otherwise LGTM.

[sunho]

In D130452#3678111, @lhames wrote:

Are there test cases for this already? Can some be added?

Otherwise LGTM.

It's tricky to add testcases for all relocations as llvm-mc can only generate IMAGE_REL_AMD64_REL32 and IMAGE_REL_AMD64_REL32_1 afaik. I manually created a testcase for IMAGE_REL_AMD64_REL32_4 by extracting dump from msvc genrated obj file to cover at least one representitive one.

llvm/lib/ExecutionEngine/JITLink/COFF_x86_64.cpp

case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_REL32: {
       break;
     }
     case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_REL32_1: {
       Kind = EdgeKind_coff_x86_64::PCRel32;
       Addend = *reinterpret_cast<const support::little32_t *>(FixupPtr);
       Addend -= 1;
       break;
     }
+    case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_REL32_2: {
+      Kind = EdgeKind_coff_x86_64::PCRel32;
+      Addend = *reinterpret_cast<const support::little32_t *>(FixupPtr);
+      Addend -= 2;
+      break;
+    }
+    case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_REL32_3: {
+      Kind = EdgeKind_coff_x86_64::PCRel32;
+      Addend = *reinterpret_cast<const support::little32_t *>(FixupPtr);
+      Addend -= 3;
+      break;
+    }
+    case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_REL32_4: {
+      Kind = EdgeKind_coff_x86_64::PCRel32;
+      Addend = *reinterpret_cast<const support::little32_t *>(FixupPtr);
+      Addend -= 4;
+      break;
+    }
+    case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_REL32_5: {
+      Kind = EdgeKind_coff_x86_64::PCRel32;
+      Addend = *reinterpret_cast<const support::little32_t *>(FixupPtr);
+      Addend -= 5;
+      break;
+    }
     case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_ADDR64: {
       Kind = EdgeKind_coff_x86_64::Pointer64;
       Addend = *reinterpret_cast<const support::little64_t *>(FixupPtr);
       break;
     }
     case COFF::RelocationTypeAMD64::IMAGE_REL_AMD64_SECTION: {
       Kind = EdgeKind_coff_x86_64::SectionIdx16;
       Addend = *reinterpret_cast<const support::little16_t *>(FixupPtr);