Changes in directory llvm/lib/Target/PowerPC:
PPCTargetAsmInfo.cpp updated: 1.13 -> 1.14
---
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)
PPCTargetAsmInfo.cpp | 7 +++++++
1 files changed, 7 insertions(+)
Index: llvm/lib/Target/PowerPC/PPCTargetAsmInfo.cpp
diff -u llvm/lib/Target/PowerPC/PPCTargetAsmInfo.cpp:1.13
llvm/lib/Target/PowerPC/PPCTargetAsmInfo.cpp:1.14
--- llvm/lib/Target/PowerPC/PPCTargetAsmInfo.cpp:1.13 Tue Jan 16 03:29:16 2007
+++ llvm/lib/Target/PowerPC/PPCTargetAsmInfo.cpp Wed Jan 17 19:15:58 2007
@@ -57,6 +57,13 @@
UsedDirective = "\t.no_dead_strip\t";
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";
+ }
}
LinuxTargetAsmInfo::LinuxTargetAsmInfo(const PPCTargetMachine &TM)
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