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- Add getLSDAEncoding to the PowerPC backend.

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- Greatly improve the comments to the getLSDAEncoding method.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93796 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2010-01-18 22:36:35 +00:00
parent 59780b8017
commit 48814681d7
5 changed files with 51 additions and 2 deletions
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lib/Target/X86/X86TargetMachine.cpp
+8 -1
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@@ -250,12 +250,19 @@ void X86TargetMachine::setCodeModelForJIT() {
setCodeModel(CodeModel::Small);
}
/// getLSDAEncoding - Returns the LSDA pointer encoding. The choices are 4-byte,
/// 8-byte, and target default. The CIE is hard-coded to indicate that the LSDA
/// pointer in the FDE section is an "sdata4", and should be encoded as a 4-byte
/// pointer by default. However, some systems may require a different size due
/// to bugs or other conditions. We will default to a 4-byte encoding unless the
/// system tells us otherwise.
///
/// FIXME: This call-back isn't good! We should be using the correct encoding
/// regardless of the system. However, there are some systems which have bugs
/// that prevent this from occuring.
DwarfLSDAEncoding::Encoding X86TargetMachine::getLSDAEncoding() const {
if (Subtarget.isTargetDarwin() && Subtarget.getDarwinVers() != 10)
return DwarfLSDAEncoding::FourByte;
return DwarfLSDAEncoding::Default;
return DwarfLSDAEncoding::EightByte;
}