[PATCH] D15546: [WebAssembly] Print an extra local decl when the user stack pointer is used

[Dan Gohman via llvm-commits]

sunfish added inline comments.

================
Comment at: lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp:185
@@ -183,1 +184,3 @@
   }
+  if (MF->getFrameInfo()->getStackSize() > 0) {
+    // TODO: wasm64
----------------
dschuff wrote:
> well, IIUC it would be "iterate over phys regs except for ARGUMENTS and EXPR_STACK" which would leave us with SP and FP. so approximately the same level of weirdness either way?
I mean iterate over MFI->PhysRegs and only look at elements that are not -1U. That way if we implement MFI->adjustsStack() or hasFP(MF) or whatever in WebAssemblyFrameInfo.cpp, we won't need to update this code too.

I think you can extend WebAssemblyAsmPrinter::getRegType to know about physregs using TRI->getMinimalPhysRegClass.


http://reviews.llvm.org/D15546