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cmd/compile,runtime: remove ambiguously live logic

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The previous CL introduced stack objects. This CL removes the old
ambiguously live liveness analysis. After this CL we're relying
on stack objects exclusively.

Update a bunch of liveness tests to reflect the new world.

Fixes #22350

Change-Id: I739b26e015882231011ce6bc1a7f426049e59f31
Reviewed-on: https://go-review.googlesource.com/c/134156
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Keith Randall 2018-09-07 14:55:09 -07:00 • committed by Keith Randall
parent cbafcc55e8
commit 9a8372f8bd
16 changed files with 375 additions and 334 deletions
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6
src/cmd/compile/internal/gc/sinit.go
View file

@ -839,6 +839,10 @@ func slicelit(ctxt initContext, n *Node, var_ *Node, init *Nodes) {
a = nod(OAS, x, nil)
a = typecheck(a, Etop)
init.Append(a) // zero new temp
} else {
// Declare that we're about to initialize all of x.
// (Which happens at the *vauto = vstat below.)
init.Append(nod(OVARDEF, x, nil))
}
a = nod(OADDR, x, nil)
@ -849,6 +853,8 @@ func slicelit(ctxt initContext, n *Node, var_ *Node, init *Nodes) {
a = typecheck(a, Etop)
init.Append(a) // zero new temp
a = a.Left
} else {
init.Append(nod(OVARDEF, a, nil))
}
a = nod(OADDR, a, nil)