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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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1
src/cmd/compile/internal/gc/syntax.go
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@ -739,6 +739,7 @@ const (
OCLOSUREVAR // variable reference at beginning of closure function
OCFUNC // reference to c function pointer (not go func value)
OCHECKNIL // emit code to ensure pointer/interface not nil
OVARDEF // variable is about to be fully initialized
OVARKILL // variable is dead
OVARLIVE // variable is alive
OINDREGSP // offset plus indirect of REGSP, such as 8(SP).