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[dev.typeparams] Revert "[dev.typeparams] runtime,cmd/compile,cmd/link: replace jmpdefer with a loop"

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This reverts CL 227652.

I'm reverting CL 337651 and this builds on top of it.

Change-Id: I03ce363be44c2a3defff2e43e7b1aad83386820d
Reviewed-on: https://go-review.googlesource.com/c/go/+/338709
Trust: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Austin Clements 2021-07-30 16:40:17 -04:00
parent 40e561d933
commit e3e9f0bb2d
31 changed files with 324 additions and 39 deletions
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7
src/cmd/compile/internal/wasm/ssa.go
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@ -24,6 +24,7 @@ func Init(arch *ssagen.ArchInfo) {
arch.ZeroRange = zeroRange
arch.Ginsnop = ginsnop
arch.Ginsnopdefer = ginsnop
arch.SSAMarkMoves = ssaMarkMoves
arch.SSAGenValue = ssaGenValue
@ -125,11 +126,7 @@ func ssaGenValue(s *ssagen.State, v *ssa.Value) {
case ssa.OpWasmLoweredStaticCall, ssa.OpWasmLoweredClosureCall, ssa.OpWasmLoweredInterCall:
s.PrepareCall(v)
if call, ok := v.Aux.(*ssa.AuxCall); ok && call.Fn == ir.Syms.Deferreturn {
// The runtime needs to inject jumps to
// deferreturn calls using the address in
// _func.deferreturn. Hence, the call to
// deferreturn must itself be a resumption
// point so it gets a target PC.
// add a resume point before call to deferreturn so it can be called again via jmpdefer
s.Prog(wasm.ARESUMEPOINT)
}
if v.Op == ssa.OpWasmLoweredClosureCall {