Generate SSA code from returns (#5172)

Modify return pseudo-instructions to have pairs of registers: virtual and real. This allows us to constrain the virtual registers to the real ones specified by the abi, instead of directly emitting moves to those real registers.
2022-11-08 16:00:49 -08:00
parent d59caf39b6
commit b077854b57
171 changed files with 6368 additions and 6364 deletions
--- a/cranelift/codegen/src/isa/aarch64/inst.isle
+++ b/cranelift/codegen/src/isa/aarch64/inst.isle
@@ -787,7 +787,7 @@

       ;; A machine return instruction.
       (Ret
-        (rets VecReg))
+        (rets VecRetPair))

       ;; A machine return instruction with pointer authentication using SP as the
       ;; modifier. This instruction requires pointer authentication support
@@ -797,7 +797,7 @@
       (AuthenticatedRet
        (key APIKey)
        (is_hint bool)
-        (rets VecReg))
+        (rets VecRetPair))

       ;; An unconditional branch.
       (Jump