[mips] Interrupt attribute support for mips32r2+.
Summary:
This patch adds support for using the "interrupt" attribute on Mips
for interrupt handling functions. At this time only mips32r2+ with the
o32 ABI with the static relocation model is supported. Unsupported
configurations will be rejected
Patch by Simon Dardis (+ clang-format & some trivial changes to follow the
LLVM coding standards by me).
Reviewers: mpf, dsanders
Subscribers: dsanders, vkalintiris, llvm-commits
Differential Revision: http://reviews.llvm.org/D10768
llvm-svn: 251286
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.h b/llvm/lib/Target/Mips/MipsISelLowering.h
index 632eefd..8546227 100644
--- a/llvm/lib/Target/Mips/MipsISelLowering.h
+++ b/llvm/lib/Target/Mips/MipsISelLowering.h
@@ -67,6 +67,10 @@
// Return
Ret,
+ // Interrupt, exception, error trap Return
+ ERet,
+
+ // Software Exception Return.
EH_RETURN,
// Node used to extract integer from accumulator.
@@ -482,6 +486,9 @@
const SmallVectorImpl<SDValue> &OutVals,
SDLoc dl, SelectionDAG &DAG) const override;
+ SDValue LowerInterruptReturn(SmallVectorImpl<SDValue> &RetOps, SDLoc DL,
+ SelectionDAG &DAG) const;
+
bool shouldSignExtendTypeInLibCall(EVT Type, bool IsSigned) const override;
// Inline asm support