MCObjectStreamer: assign MCSymbols in the dummy fragment to offset 0.
In MCObjectStreamer, when there is no current fragment, initially
symbols are created in a "pending" state and assigned to a dummy
empty fragment.
Previously, they were not being assigned an offset, and thus
evaluateAbsolute would fail if trying to evaluate an expression 'a -
b', where both 'a' and 'b' were in this pending state.
Also slightly refactored the EmitLabel overload which takes an
MCFragment for clarity.
Fixes: https://llvm.org/PR41825
Differential Revision: https://reviews.llvm.org/D70062
diff --git a/llvm/lib/MC/MCELFStreamer.cpp b/llvm/lib/MC/MCELFStreamer.cpp
index fa21330..c2e2beb 100644
--- a/llvm/lib/MC/MCELFStreamer.cpp
+++ b/llvm/lib/MC/MCELFStreamer.cpp
@@ -106,9 +106,10 @@
Symbol->setType(ELF::STT_TLS);
}
-void MCELFStreamer::EmitLabel(MCSymbol *S, SMLoc Loc, MCFragment *F) {
+void MCELFStreamer::EmitLabelAtPos(MCSymbol *S, SMLoc Loc, MCFragment *F,
+ uint64_t Offset) {
auto *Symbol = cast<MCSymbolELF>(S);
- MCObjectStreamer::EmitLabel(Symbol, Loc, F);
+ MCObjectStreamer::EmitLabelAtPos(Symbol, Loc, F, Offset);
const MCSectionELF &Section =
static_cast<const MCSectionELF &>(*getCurrentSectionOnly());