diff options
| author | Chris Lattner <sabre@nondot.org> | 2007-01-18 01:15:58 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-01-18 01:15:58 +0000 |
| commit | b266ccd0f41b3ac9d9ad733e73204d9177c12e9f (patch) | |
| tree | 132422713692506d709337c4ef38c7cb58adb8fe /lib/Target/PowerPC/PPCTargetAsmInfo.cpp | |
| parent | 393a8eea3c15de08eaf6953aa8a65a3961b76153 (diff) | |
| download | external_llvm-b266ccd0f41b3ac9d9ad733e73204d9177c12e9f.tar.gz external_llvm-b266ccd0f41b3ac9d9ad733e73204d9177c12e9f.tar.bz2 external_llvm-b266ccd0f41b3ac9d9ad733e73204d9177c12e9f.zip | |
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33315 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCTargetAsmInfo.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPCTargetAsmInfo.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCTargetAsmInfo.cpp b/lib/Target/PowerPC/PPCTargetAsmInfo.cpp index b9f5849bdf..b54c9e9eb6 100644 --- a/lib/Target/PowerPC/PPCTargetAsmInfo.cpp +++ b/lib/Target/PowerPC/PPCTargetAsmInfo.cpp @@ -57,6 +57,13 @@ DarwinTargetAsmInfo::DarwinTargetAsmInfo(const PPCTargetMachine &TM) 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) |