Added initial support for DEBUG_LABEL allowing debug specific labels to be

inserted in the code.

llvm-svn: 25104

3 files changed, 16 insertions, 6 deletions

diff --git a/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp b/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
index abbe95a852e..de865db69bd 100644
--- a/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ b/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -252,7 +252,9 @@ namespace {
     bool doFinalization(Module &M);
     
     void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesAll();
       AU.addRequired<MachineDebugInfo>();
+      PPCAsmPrinter::getAnalysisUsage(AU);
     }
 
   };
@@ -418,6 +420,9 @@ void PPCAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
 /// method to print assembly for each instruction.
 ///
 bool DarwinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+  // FIXME - is this the earliest this can be set.
+  DW.SetDebugInfo(&getAnalysis<MachineDebugInfo>());
+
   SetupMachineFunction(MF);
   O << "\n\n";
   
@@ -486,7 +491,6 @@ bool DarwinAsmPrinter::doInitialization(Module &M) {
   Mang->setUseQuotes(true);
   
   // Emit initial debug information.
-  DW.SetDebugInfo(getAnalysisToUpdate<MachineDebugInfo>());
   DW.BeginModule();
   return false;
 }
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index 01d8f075b7b..8eb4ac303a7 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -94,8 +94,11 @@ PPCTargetLowering::PPCTargetLowering(TargetMachine &TM)
   // PowerPC does not have truncstore for i1.
   setOperationAction(ISD::TRUNCSTORE, MVT::i1, Promote);
 
-  // PowerPC doesn't have line number support yet.
+  // Support label based line numbers.
   setOperationAction(ISD::LOCATION, MVT::Other, Expand);
+  // FIXME - use subtarget debug flags
+  if (TM.getSubtarget<PPCSubtarget>().isDarwin())
+    setOperationAction(ISD::DEBUG_LABEL, MVT::Other, Expand);
   
   // We want to legalize GlobalAddress and ConstantPool nodes into the 
   // appropriate instructions to materialize the address.
diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.td b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
index 3d3424d17bc..66b1bad4b0d 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
@@ -955,11 +955,14 @@ def V_SET0 : VXForm_setzero<1220, (ops VRRC:$vD),
 // DWARF Pseudo Instructions
 //
 
-def DWARF_LOC        : Pseudo<(ops i32imm:$line, i32imm:$col, i32imm:$file,
-                                   i32imm:$id),
-                              "; .loc $file, $line, $col\nLdebug_loc$id:",
+def DWARF_LOC        : Pseudo<(ops i32imm:$line, i32imm:$col, i32imm:$file),
+                              "; .loc $file, $line, $col",
                       [(dwarf_loc (i32 imm:$line), (i32 imm:$col),
-                                  (i32 imm:$file), (i32 imm:$id))]>;
+                                  (i32 imm:$file))]>;
+
+def DWARF_LABEL      : Pseudo<(ops i32imm:$id),
+                              "\nLdebug_loc$id:",
+                      [(dwarf_label (i32 imm:$id))]>;
 
 //===----------------------------------------------------------------------===//
 // PowerPC Instruction Patterns