tinygo-org/tinygo
1
0
Fork 0
mirror of https://github.com/tinygo-org/tinygo.git synced 2026-08-10 14:03:39 +00:00
Code Issues Packages Projects Releases 6 Wiki Activity

compiler: add support for channel operations

Browse Source 
Support for channels is not complete. The following pieces are missing:

  * Channels with values bigger than int. An int in TinyGo can always
    contain at least a pointer, so pointers are okay to send.
  * Buffered channels.
  * The select statement.
This commit is contained in:
Ayke van Laethem
2019-01-13 17:05:00 +01:00
parent 602c264749
commit 2e4dd09bbc
8 changed files with 502 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
compiler/compiler.go
+18 -2
View File
@@ -366,6 +366,8 @@ func (c *Compiler) Compile(mainPath string) error {
realMain.SetLinkage(llvm.ExternalLinkage) // keep alive until goroutine lowering
c.mod.NamedFunction("runtime.alloc").SetLinkage(llvm.ExternalLinkage)
c.mod.NamedFunction("runtime.free").SetLinkage(llvm.ExternalLinkage)
c.mod.NamedFunction("runtime.chanSend").SetLinkage(llvm.ExternalLinkage)
c.mod.NamedFunction("runtime.chanRecv").SetLinkage(llvm.ExternalLinkage)
c.mod.NamedFunction("runtime.sleepTask").SetLinkage(llvm.ExternalLinkage)
c.mod.NamedFunction("runtime.activateTask").SetLinkage(llvm.ExternalLinkage)
c.mod.NamedFunction("runtime.scheduler").SetLinkage(llvm.ExternalLinkage)
@@ -1297,6 +1299,8 @@ func (c *Compiler) parseInstr(frame *Frame, instr ssa.Instruction) error {
}
case *ssa.RunDefers:
return c.emitRunDefers(frame)
case *ssa.Send:
return c.emitChanSend(frame, instr)
case *ssa.Store:
llvmAddr, err := c.parseExpr(frame, instr.Addr)
if err == ir.ErrCGoWrapper {
@@ -1362,11 +1366,17 @@ func (c *Compiler) parseBuiltin(frame *Frame, args []ssa.Value, callName string,
return llvm.Value{}, err
}
switch args[0].Type().(type) {
case *types.Chan:
// Channel. Buffered channels haven't been implemented yet so always
// return 0.
return llvm.ConstInt(c.intType, 0, false), nil
case *types.Slice:
return c.builder.CreateExtractValue(value, 2, "cap"), nil
default:
return llvm.Value{}, c.makeError(pos, "todo: cap: unknown type")
}
case "close":
return llvm.Value{}, c.emitChanClose(frame, args[0])
case "complex":
r, err := c.parseExpr(frame, args[0])
if err != nil {
@@ -1434,6 +1444,10 @@ func (c *Compiler) parseBuiltin(frame *Frame, args []ssa.Value, callName string,
case *types.Basic, *types.Slice:
// string or slice
llvmLen = c.builder.CreateExtractValue(value, 1, "len")
case *types.Chan:
// Channel. Buffered channels haven't been implemented yet so always
// return 0.
llvmLen = llvm.ConstInt(c.intType, 0, false)
case *types.Map:
llvmLen = c.createRuntimeCall("hashmapLen", []llvm.Value{value}, "len")
default:
@@ -2000,12 +2014,12 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
default:
panic("unknown lookup type: " + expr.String())
}
case *ssa.MakeChan:
return c.emitMakeChan(expr)
case *ssa.MakeClosure:
// A closure returns a function pointer with context:
// {context, fp}
return c.parseMakeClosure(frame, expr)
case *ssa.MakeInterface:
val, err := c.parseExpr(frame, expr.X)
if err != nil {
@@ -2941,6 +2955,8 @@ func (c *Compiler) parseUnOp(frame *Frame, unop *ssa.UnOp) (llvm.Value, error) {
}
case token.XOR: // ^x, toggle all bits in integer
return c.builder.CreateXor(x, llvm.ConstInt(x.Type(), ^uint64(0), false), ""), nil
case token.ARROW: // <-x, receive from channel
return c.emitChanRecv(frame, unop)
default:
return llvm.Value{}, c.makeError(unop.Pos(), "todo: unknown unop")
}