[WebAssembly] Clean up several FIXME comments.
llvm-svn: 254079
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
index 493e4be..2933294 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
@@ -134,9 +134,8 @@
//===----------------------------------------------------------------------===//
void WebAssemblyPassConfig::addIRPasses() {
- // FIXME: the default for this option is currently POSIX, whereas
- // WebAssembly's MVP should default to Single.
if (TM->Options.ThreadModel == ThreadModel::Single)
+ // In "single" mode, atomics get lowered to non-atomics.
addPass(createLowerAtomicPass());
else
// Expand some atomic operations. WebAssemblyTargetLowering has hooks which
@@ -168,8 +167,9 @@
}
void WebAssemblyPassConfig::addPostRegAlloc() {
- // FIXME: the following passes dislike virtual registers. Disable them for now
- // so that basic tests can pass. Future patches will remedy this.
+ // TODO: The following CodeGen passes don't currently support code containing
+ // virtual registers. Consider removing their restrictions and re-enabling
+ // them.
//
// Fails with: Regalloc must assign all vregs.
disablePass(&PrologEpilogCodeInserterID);