[Sparc] Add support for 13-bit PIC
Summary: When compiling with -fpic, in contrast to -fPIC, use only the
immediate field to index into the GOT. This saves space if the GOT is
known to be small. The linker will warn if the GOT is too large for
this method.
Reviewers: jyknight, venkatra
Reviewed By: jyknight
Subscribers: brad, fedor.sergeev, jrtc27, llvm-commits
Differential Revision: https://reviews.llvm.org/D47136
llvm-svn: 334383
diff --git a/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp b/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp
index 35d92a9..c7a5a1e 100644
--- a/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp
+++ b/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp
@@ -885,9 +885,17 @@
const MCExpr *Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None,
getContext());
- if (isCall && getContext().getObjectFileInfo()->isPositionIndependent())
- Res = SparcMCExpr::create(SparcMCExpr::VK_Sparc_WPLT30, Res,
- getContext());
+ SparcMCExpr::VariantKind Kind = SparcMCExpr::VK_Sparc_13;
+
+ if (getContext().getObjectFileInfo()->isPositionIndependent()) {
+ if (isCall)
+ Kind = SparcMCExpr::VK_Sparc_WPLT30;
+ else
+ Kind = SparcMCExpr::VK_Sparc_GOT13;
+ }
+
+ Res = SparcMCExpr::create(Kind, Res, getContext());
+
Op = SparcOperand::CreateImm(Res, S, E);
}
break;