[llvm] r181201 - [SystemZ] Define DWARF encoding

[Ulrich Weigand]

Author: uweigand
Date: Mon May  6 11:11:12 2013
New Revision: 181201

URL: http://llvm.org/viewvc/llvm-project?rev=181201&view=rev
Log:

[SystemZ] Define DWARF encoding

This is another patch in preparation for adding the SystemZ target.
It defines the appropriate values for DWARF encodings; the intent
is to be compatible with what GCC currently does on the target.

Patch by Richard Sandiford.


Modified:
    llvm/trunk/lib/MC/MCObjectFileInfo.cpp

Modified: llvm/trunk/lib/MC/MCObjectFileInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCObjectFileInfo.cpp?rev=181201&r1=181200&r2=181201&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCObjectFileInfo.cpp (original)
+++ llvm/trunk/lib/MC/MCObjectFileInfo.cpp Mon May  6 11:11:12 2013
@@ -295,6 +295,15 @@ void MCObjectFileInfo::InitELFMCObjectFi
     FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
     TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
       dwarf::DW_EH_PE_udata8;
+  } else if (T.getArch() == Triple::systemz) {
+    // All currently-defined code models guarantee that 4-byte PC-relative
+    // values will be in range.
+    PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+      dwarf::DW_EH_PE_sdata4;
+    LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+    FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+    TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+      dwarf::DW_EH_PE_sdata4;
   }
 
   // Solaris requires different flags for .eh_frame to seemingly every other