[PPC64] Support "symbol@high" and "symbol@higha" symbol modifers.

Add support for the "@high" and "@higha" symbol modifiers in powerpc64 assembly.
The modifiers represent accessing the segment consiting of bits 16-31 of a
64-bit address/offset.

Differential Revision: https://reviews.llvm.org/D47729

llvm-svn: 334855

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp
index 52bf5149d38..7315a73d286 100644
--- a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp
+++ b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp
@@ -55,6 +55,10 @@ static MCSymbolRefExpr::VariantKind getAccessVariant(const MCValue &Target,
     return MCSymbolRefExpr::VK_PPC_HI;
   case PPCMCExpr::VK_PPC_HA:
     return MCSymbolRefExpr::VK_PPC_HA;
+  case PPCMCExpr::VK_PPC_HIGH:
+    return MCSymbolRefExpr::VK_PPC_HIGH;
+  case PPCMCExpr::VK_PPC_HIGHA:
+    return MCSymbolRefExpr::VK_PPC_HIGHA;
   case PPCMCExpr::VK_PPC_HIGHERA:
     return MCSymbolRefExpr::VK_PPC_HIGHERA;
   case PPCMCExpr::VK_PPC_HIGHER:
@@ -151,6 +155,12 @@ unsigned PPCELFObjectWriter::getRelocType(MCContext &Ctx, const MCValue &Target,
       case MCSymbolRefExpr::VK_PPC_HA:
         Type = ELF::R_PPC_ADDR16_HA;
         break;
+      case MCSymbolRefExpr::VK_PPC_HIGH:
+        Type = ELF::R_PPC64_ADDR16_HIGH;
+        break;
+      case MCSymbolRefExpr::VK_PPC_HIGHA:
+        Type = ELF::R_PPC64_ADDR16_HIGHA;
+        break;
       case MCSymbolRefExpr::VK_PPC_HIGHER:
         Type = ELF::R_PPC64_ADDR16_HIGHER;
         break;