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| author | Keith Randall <khr@golang.org> | 2016-09-12 13:47:55 -0700 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2016-09-12 22:41:03 +0000 |
| commit | 6ca7c2055bd114c08426d3dbdee444b280b569b6 (patch) | |
| tree | e1a6b9551ef3a50ed17db4fc44e0c1e9a60d9102 /src/runtime | |
| parent | e42ae65a85079a9f39d0fb4837a78172ad898d84 (diff) | |
| download | go-6ca7c2055bd114c08426d3dbdee444b280b569b6.tar.xz | |
cmd/compile: fix tuple-generating flag ops as clobbering flags
If an op generates a tuple, and part of that tuple is of flags type,
then treat the op as clobbering flags.
Normally this doesn't matter because we do:
v1 = ADDS <int32, flags>
v2 = Select0 v1 <int32>
v3 = Select1 v1 <flags>
And v3 will do the right clobbering of flags. But in the rare
cases where we issue a tuple-with-flag op and the flag portion
is dead, then we never issue a Select1. But v1 still clobbers flags,
so we need to respect that.
Fixes builder failure in CL 28950.
Change-Id: I589089fd81aaeaaa9750bb8d85e7b10199aaa002
Reviewed-on: https://go-review.googlesource.com/29083
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Diffstat (limited to 'src/runtime')
0 files changed, 0 insertions, 0 deletions