tree 826dc7355c8b4308d7e90343957a2626c3de4f6b
parent d8796368ecb22601131847098d788992dfff6c93
author Cherry Zhang <cherryyz@google.com> 1505247528 -0400
committer Cherry Zhang <cherryyz@google.com> 1505331036 +0000

gollvm: fast path for creating zero valued composite constant

Detect if we're creating a zero value, and if so take a fast
path. This makes "[1<<30]byte{}" not take forever.

Nonzero value like "[1<<30]byte{1<<29: 42}" is still very slow.
gccgo just sets the element inlined without creating a gigantic
literal in static data. Maybe we can do this as well. This will
rely on a fast creation of zero value. So this CL sets up the
base.

Change-Id: I15a9cf828e528a99c3cd72be1fb03344156687c8
Reviewed-on: https://go-review.googlesource.com/63271
Reviewed-by: Than McIntosh <thanm@google.com>