[COFF, ARM64] Hook up a few remaining relocations

[peter.smith]

Looks good to me. I checked the relocation against the table in https://msdn.microsoft.com/en-us/library/windows/desktop/ms680547(v=vs.85).aspx#base_relocation_types

lib/Target/AArch64/MCTargetDesc/AArch64WinCOFFObjectWriter.cpp

unsigned AArch64WinCOFFObjectWriter::getRelocType(
   case AArch64::fixup_aarch64_ldst_imm12_scale16:
     if (const AArch64MCExpr *A64E = dyn_cast<AArch64MCExpr>(Expr)) {
       AArch64MCExpr::VariantKind RefKind = A64E->getKind();
       if (RefKind == AArch64MCExpr::VK_SECREL_LO12)
         return COFF::IMAGE_REL_ARM64_SECREL_LOW12L;
     }
     return COFF::IMAGE_REL_ARM64_PAGEOFFSET_12L;
 
+  case AArch64::fixup_aarch64_pcrel_adr_imm21:
+    return COFF::IMAGE_REL_ARM64_REL21;
+
   case AArch64::fixup_aarch64_pcrel_adrp_imm21:
     return COFF::IMAGE_REL_ARM64_PAGEBASE_REL21;
 
+  case AArch64::fixup_aarch64_pcrel_branch14:
+    return COFF::IMAGE_REL_ARM64_BRANCH14;
+
+  case AArch64::fixup_aarch64_pcrel_branch19:
+    return COFF::IMAGE_REL_ARM64_BRANCH19;
+
   case AArch64::fixup_aarch64_pcrel_branch26:
   case AArch64::fixup_aarch64_pcrel_call26:
     return COFF::IMAGE_REL_ARM64_BRANCH26;
   }
 }
 
 bool AArch64WinCOFFObjectWriter::recordRelocation(const MCFixup &Fixup) const {
   return true;

test/MC/AArch64/coff-relocations.s

 
 ; IMAGE_REL_ARM64_SECREL_LOW12A
 add x0, x0, :secrel_lo12:foo
 ; IMAGE_REL_ARM64_SECREL_HIGH12A
 add x0, x0, :secrel_hi12:foo
 ; IMAGE_REL_ARM64_SECREL_LOW12L
 ldr x0, [x0, :secrel_lo12:foo]
 
+; IMAGE_REL_ARM64_REL21
+adr x0, foo + 0x12345
+
+; IMAGE_REL_ARM64_BRANCH19
+bne target
+
+; IMAGE_REL_ARM64_BRANCH14
+tbz x0, #0, target
+
 ; CHECK: Format: COFF-ARM64
 ; CHECK: Arch: aarch64
 ; CHECK: AddressSize: 64bit
 ; CHECK: Relocations [
 ; CHECK:   Section (1) .text {
 ; CHECK: 0x4 IMAGE_REL_ARM64_ADDR32 foo
 ; CHECK: 0x8 IMAGE_REL_ARM64_ADDR32NB func
 ; CHECK: 0xC IMAGE_REL_ARM64_ADDR64 arr
 ; CHECK: 0x14 IMAGE_REL_ARM64_BRANCH26 target
 ; CHECK: 0x18 IMAGE_REL_ARM64_PAGEBASE_REL21 foo
 ; CHECK: 0x1C IMAGE_REL_ARM64_PAGEOFFSET_12A foo
 ; CHECK: 0x20 IMAGE_REL_ARM64_PAGEOFFSET_12L foo
 ; CHECK: 0x24 IMAGE_REL_ARM64_PAGEBASE_REL21 bar
 ; CHECK: 0x28 IMAGE_REL_ARM64_SECREL .text
 ; CHECK: 0x2C IMAGE_REL_ARM64_SECTION func
 ; CHECK: 0x30 IMAGE_REL_ARM64_PAGEBASE_REL21 baz
 ; CHECK: 0x34 IMAGE_REL_ARM64_PAGEOFFSET_12A foo
 ; CHECK: 0x38 IMAGE_REL_ARM64_PAGEOFFSET_12L foo
 ; CHECK: 0x3C IMAGE_REL_ARM64_PAGEOFFSET_12L foo
 ; CHECK: 0x40 IMAGE_REL_ARM64_SECREL_LOW12A foo
 ; CHECK: 0x44 IMAGE_REL_ARM64_SECREL_HIGH12A foo
 ; CHECK: 0x48 IMAGE_REL_ARM64_SECREL_LOW12L foo
+; CHECK: 0x4C IMAGE_REL_ARM64_REL21 foo
+; CHECK: 0x50 IMAGE_REL_ARM64_BRANCH19 target
+; CHECK: 0x54 IMAGE_REL_ARM64_BRANCH14 target
 ; CHECK:   }
 ; CHECK: ]
 
 ; DISASM: 30:       20 1a 09 b0     adrp    x0, #305418240
 ; DISASM: 34:       00 14 0d 91     add     x0, x0, #837
 ; DISASM: 38:       00 14 4d 39     ldrb    w0, [x0, #837]
 ; DISASM: 3c:       00 a4 41 f9     ldr     x0, [x0, #840]
 ; DISASM: 40:       00 00 00 91     add     x0, x0, #0
 ; DISASM: 44:       00 00 40 91     add     x0, x0, #0, lsl #12
 ; DISASM: 48:       00 00 40 f9     ldr     x0, [x0]
+; DISASM: 4c:       20 1a 09 30     adr     x0, #74565