Changes in directory llvm/lib/Target/X86:
X86TargetAsmInfo.cpp updated: 1.29 -> 1.30
---
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)
X86TargetAsmInfo.cpp | 7 +++++++
1 files changed, 7 insertions(+)
Index: llvm/lib/Target/X86/X86TargetAsmInfo.cpp
diff -u llvm/lib/Target/X86/X86TargetAsmInfo.cpp:1.29
llvm/lib/Target/X86/X86TargetAsmInfo.cpp:1.30
--- llvm/lib/Target/X86/X86TargetAsmInfo.cpp:1.29 Wed Jan 17 11:43:33 2007
+++ llvm/lib/Target/X86/X86TargetAsmInfo.cpp Wed Jan 17 19:15:58 2007
@@ -68,6 +68,13 @@
WeakRefDirective = "\t.weak_reference\t";
HiddenDirective = "\t.private_extern\t";
+ // 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";
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