commit 30ea00a73f82df33ce1a38628fbff1b56a778f4c
author Jim Grosbach <grosbach@apple.com> Wed Jul 21 23:03:52 2010 +0000
committer Jim Grosbach <grosbach@apple.com> Wed Jul 21 23:03:52 2010 +0000
tree 233f587ebc5132d81e673a7ff8ec77788b6f7321
parent 3cc577cf1f21f8c881195e50ad88e03392cee742

For ARM/Darwin, add a dwarf entry indicating whether a function is arm or thumb
rdar://8202967

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109057 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/DwarfDebug.cpp

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 513e6ad..5618f09 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1336,6 +1336,10 @@
   if (SP.isOptimized())
     addUInt(SPDie, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1);
 
+  if (unsigned isa = Asm->getISAEncoding()) {
+    addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa);
+  }
+
   // DW_TAG_inlined_subroutine may refer to this DIE.
   SPCU->insertDIE(SP, SPDie);
 

lib/Target/ARM/ARMAsmPrinter.cpp

diff --git a/lib/Target/ARM/ARMAsmPrinter.cpp b/lib/Target/ARM/ARMAsmPrinter.cpp
index 3cc6c8f..003bdac 100644
--- a/lib/Target/ARM/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/ARMAsmPrinter.cpp
@@ -56,6 +56,15 @@
 EnableMCInst("enable-arm-mcinst-printer", cl::Hidden,
             cl::desc("enable experimental asmprinter gunk in the arm backend"));
 
+namespace llvm {
+  namespace ARM {
+    enum DW_ISA {
+      DW_ISA_ARM_thumb = 1,
+      DW_ISA_ARM_arm = 2
+    };
+  }
+}
+
 namespace {
   class ARMAsmPrinter : public AsmPrinter {
 
@@ -196,6 +205,14 @@
     void EmitStartOfAsmFile(Module &M);
     void EmitEndOfAsmFile(Module &M);
 
+    virtual unsigned getISAEncoding() {
+      // ARM/Darwin adds ISA to the DWARF info for each function.
+      if (!Subtarget->isTargetDarwin())
+        return 0;
+      return Subtarget->isThumb() ?
+        llvm::ARM::DW_ISA_ARM_thumb : llvm::ARM::DW_ISA_ARM_arm;
+    }
+
     MCSymbol *GetARMSetPICJumpTableLabel2(unsigned uid, unsigned uid2,
                                           const MachineBasicBlock *MBB) const;
     MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const;