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Modify emission of jump tables on darwin to emit an extra "l" label that

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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@33362 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-01-19 18:59:56 +00:00
parent 42d7ccfd8e
commit 8e1185bd5c
1 changed files with 7 additions and 0 deletions
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7
lib/Target/ARM/ARMTargetAsmInfo.cpp
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@ -33,6 +33,13 @@ ARMTargetAsmInfo::ARMTargetAsmInfo(const ARMTargetMachine &TM) {
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";