So, it turns out I forgot that one valid way of restoring GP after a call
is to use RA, which assumes the called function uses RA for the register
holding the return address when it issues a ret.
llvm-svn: 22301
diff --git a/llvm/lib/Target/Alpha/AlphaISelPattern.cpp b/llvm/lib/Target/Alpha/AlphaISelPattern.cpp
index deb3678..43bc1b8 100644
--- a/llvm/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/llvm/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -92,8 +92,7 @@
setOperationAction(ISD::BRCONDTWOWAY, MVT::Other, Expand);
setOperationAction(ISD::EXTLOAD, MVT::i1, Promote);
- setOperationAction(ISD::EXTLOAD, MVT::f32, Promote);
-
+
setOperationAction(ISD::ZEXTLOAD, MVT::i1 , Expand);
setOperationAction(ISD::ZEXTLOAD, MVT::i32 , Expand);
@@ -2392,7 +2391,8 @@
break;
}
// Just emit a 'ret' instruction
- BuildMI(BB, Alpha::RET, 1, Alpha::R31).addReg(AlphaLowering.getRA());
+ AlphaLowering.restoreRA(BB);
+ BuildMI(BB, Alpha::RET, 1, Alpha::R31).addReg(Alpha::R26);
return;
case ISD::TRUNCSTORE: