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Cherry Zhang f1ac85c8d1 cmd/internal/obj/arm64: fix 32-bit BITCON test 
The BITCON test, isbitcon, assumes 32-bit constants are expanded
repeatedly, i.e. by copying the low 32 bits to high 32 bits,
instead of zero extending. We already do such expansion in
progedit. In con32class when classifying 32-bit constants, we
should use the expanded constant, instead of zero-extending it.

TODO: we could have better encoding for things like ANDW $-1, Rx.

Fixes #38946.

Change-Id: I37d0c95d744834419db5c897fd1f6c187595c926
Reviewed-on: https://go-review.googlesource.com/c/go/+/232984
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
2020-05-08 20:57:01 +00:00
.github .github: add link to questions in ISSUE_TEMPLATE 2020-01-06 17:05:31 +00:00
api all: remove scattered remnants of darwin/386 2020-04-08 18:37:38 +00:00
doc syscall: if Setctty, require that Ctty be a child descriptor 2020-05-01 21:57:29 +00:00
lib/time lib/time, time/tzdata: update tz data to 2020a 2020-04-30 08:07:39 +00:00
misc cmd/cgo: use type aliases for #define type macros 2020-05-01 18:01:28 +00:00
src cmd/internal/obj/arm64: fix 32-bit BITCON test 2020-05-08 20:57:01 +00:00
test cmd/compile: improve error when setting unexported fields 2020-05-08 20:44:01 +00:00
.gitattributes build: force all Windows batch files to CRLF 2020-03-22 08:42:38 +00:00
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: add Alexey Semenyuk (individual CLA) 2020-05-01 19:36:54 +00:00
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README.md

The Go Programming Language

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