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cmd/compile: intrinsify runtime.getcallersp

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Add a compiler intrinsic for getcallersp. So we are able to get
rid of the argument (not done in this CL).

Change-Id: Ic38fda1c694f918328659ab44654198fb116668d
Reviewed-on: https://go-review.googlesource.com/69350
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Cherry Zhang 2017-10-09 15:33:29 -04:00
parent ae175f74cb
commit 6f3e5e637c
37 changed files with 296 additions and 11 deletions
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src/cmd/compile/internal/ssa/gen/genericOps.go
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@ -379,6 +379,7 @@ var genericOps = []opData{
{name: "GetG", argLength: 1}, // runtime.getg() (read g pointer). arg0=mem
{name: "GetClosurePtr"}, // get closure pointer from dedicated register
{name: "GetCallerPC"}, // for getcallerpc intrinsic
{name: "GetCallerSP"}, // for getcallersp intrinsic
// Indexing operations
{name: "PtrIndex", argLength: 2}, // arg0=ptr, arg1=index. Computes ptr+sizeof(*v.type)*index, where index is extended to ptrwidth type