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1b45cc45e3
Change two-bit stack map entries to encode: 0 = dead 1 = scalar 2 = pointer 3 = multiword If multiword, the two-bit entry for the following word encodes: 0 = string 1 = slice 2 = iface 3 = eface That way, during stack scanning we can check if a string is zero length or a slice has zero capacity. We can avoid following the contained pointer in those cases. It is safe to do so because it can never be dereferenced, and it is desirable to do so because it may cause false retention of the following block in memory. Slice feature turned off until issue 7564 is fixed. Update #7549 LGTM=rsc R=golang-codereviews, bradfitz, rsc CC=golang-codereviews https://golang.org/cl/76380043 |
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| .. | ||
| acid.c | ||
| bits.c | ||
| bv.c | ||
| cc.h | ||
| cc.y | ||
| com64.c | ||
| com.c | ||
| dcl.c | ||
| doc.go | ||
| dpchk.c | ||
| funct.c | ||
| godefs.c | ||
| lex.c | ||
| lexbody | ||
| mac.c | ||
| macbody | ||
| Makefile | ||
| omachcap.c | ||
| pgen.c | ||
| pswt.c | ||
| scon.c | ||
| sub.c | ||
| y.tab.c | ||
| y.tab.h | ||