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| author | Russ Cox <rsc@golang.org> | 2011-12-05 09:40:22 -0500 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2011-12-05 09:40:22 -0500 |
| commit | 531134952ddf04ec44d3319720b50ebe857850a8 (patch) | |
| tree | eee90e78705f3e72558e5d0b05cc57a9af89596a /src/cmd/gc/range.c | |
| parent | 30355daa70240096df49dfb5f7150c7d2c5f02bc (diff) | |
| download | go-531134952ddf04ec44d3319720b50ebe857850a8.tar.gz | |
runtime: prep for type-specific algorithms
Equality on structs will require arbitrary code for type equality,
so change algorithm in type data from uint8 to table pointer.
In the process, trim top-level map structure from
104/80 bytes (64-bit/32-bit) to 24/12.
Equality on structs will require being able to call code generated
by the Go compiler, and C code has no way to access Go return
values, so change the hash and equal algorithm functions to take
a pointer to a result instead of returning the result.
R=ken
CC=golang-dev
http://codereview.appspot.com/5453043
Diffstat (limited to 'src/cmd/gc/range.c')
| -rw-r--r-- | src/cmd/gc/range.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/cmd/gc/range.c b/src/cmd/gc/range.c index 25d1131ec..9bcd833a7 100644 --- a/src/cmd/gc/range.c +++ b/src/cmd/gc/range.c @@ -167,7 +167,9 @@ walkrange(Node *n) case TMAP: th = typ(TARRAY); th->type = ptrto(types[TUINT8]); - th->bound = (sizeof(struct Hiter) + widthptr - 1) / widthptr; + // see ../../pkg/runtime/hashmap.h:/hash_iter + // Size in words. + th->bound = 5 + 4*3 + 4*4/widthptr; hit = temp(th); fn = syslook("mapiterinit", 1); |