[llvm-commits] CVS: llvm/lib/Target/ARM/ARMTargetAsmInfo.cpp

[Evan Cheng]

Changes in directory llvm/lib/Target/ARM:

ARMTargetAsmInfo.cpp updated: 1.4 -> 1.5
---
Log message:

Modify emission of jump tables on darwin to emit an extra "l" label that
delimits the boundaries of jump tables.  This lets the linker's dead code
stripping optimization do a better job.

---
Diffs of the changes:  (+7 -0)

 ARMTargetAsmInfo.cpp |    7 +++++++
 1 files changed, 7 insertions(+)


Index: llvm/lib/Target/ARM/ARMTargetAsmInfo.cpp
diff -u llvm/lib/Target/ARM/ARMTargetAsmInfo.cpp:1.4 llvm/lib/Target/ARM/ARMTargetAsmInfo.cpp:1.5
--- llvm/lib/Target/ARM/ARMTargetAsmInfo.cpp:1.4	Fri Jan 19 01:51:42 2007
+++ llvm/lib/Target/ARM/ARMTargetAsmInfo.cpp	Fri Jan 19 12:59:56 2007
@@ -33,6 +33,13 @@
     LCOMMDirective = "\t.lcomm\t";
     COMMDirectiveTakesAlignment = false;
     
+    // In non-PIC modes, emit a special label before jump tables so that the
+    // linker can perform more accurate dead code stripping.
+    if (TM.getRelocationModel() != Reloc::PIC_) {
+      // Emit a local label that is preserved until the linker runs.
+      JumpTableSpecialLabelPrefix = "l";
+    }
+    
     NeedsSet = true;
     DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
     DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";