[WebAssembly] Define WebAssembly-specific relocation codes.
Currently WebAssembly has two kinds of relocations; data addresses and
function addresses. This adds ELF relocations for them, as well as an
MC symbol kind to indicate which type of relocation is needed.
llvm-svn: 257416
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
index 7a89f78..e9933b0 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
@@ -573,7 +573,8 @@
SDLoc DL(Op);
const auto *GA = cast<GlobalAddressSDNode>(Op);
EVT VT = Op.getValueType();
- assert(GA->getTargetFlags() == 0 && "WebAssembly doesn't set target flags");
+ assert(GA->getTargetFlags() == 0 &&
+ "Unexpected target flags on generic GlobalAddressSDNode");
if (GA->getAddressSpace() != 0)
fail(DL, DAG, "WebAssembly only expects the 0 address space");
return DAG.getNode(
@@ -587,9 +588,16 @@
SDLoc DL(Op);
const auto *ES = cast<ExternalSymbolSDNode>(Op);
EVT VT = Op.getValueType();
- assert(ES->getTargetFlags() == 0 && "WebAssembly doesn't set target flags");
+ assert(ES->getTargetFlags() == 0 &&
+ "Unexpected target flags on generic ExternalSymbolSDNode");
+ // Set the TargetFlags to 0x1 which indicates that this is a "function"
+ // symbol rather than a data symbol. We do this unconditionally even though
+ // we don't know anything about the symbol other than its name, because all
+ // external symbols used in target-independent SelectionDAG code are for
+ // functions.
return DAG.getNode(WebAssemblyISD::Wrapper, DL, VT,
- DAG.getTargetExternalSymbol(ES->getSymbol(), VT));
+ DAG.getTargetExternalSymbol(ES->getSymbol(), VT,
+ /*TargetFlags=*/0x1));
}
SDValue WebAssemblyTargetLowering::LowerJumpTable(SDValue Op,