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2020-10-27cmd/compile: defer lowering OANDNOT until SSACuong Manh Le
Currently, "x &^ y" gets rewriten into "x & ^y" during walk. It adds unnecessary complexity to other parts, which must aware about this. Instead, we can just implement "&^" in the conversion to SSA, so "&^" can be handled like other binary operators. However, this CL does not pass toolstash-check. It seems that implements "&^" in the conversion to SSA causes registers allocation change. With the parent: obj: 00212 (.../src/runtime/complex.go:47) MOVQ X0, AX obj: 00213 (.../src/runtime/complex.go:47) BTRQ $63, AX obj: 00214 (.../src/runtime/complex.go:47) MOVQ "".n(SP), CX obj: 00215 (.../src/runtime/complex.go:47) MOVQ $-9223372036854775808, DX obj: 00216 (.../src/runtime/complex.go:47) ANDQ DX, CX obj: 00217 (.../src/runtime/complex.go:47) ORQ AX, CX With this CL: obj: 00212 (.../src/runtime/complex.go:47) MOVQ X0, AX obj: 00213 (.../src/runtime/complex.go:47) BTRQ $63, AX obj: 00214 (.../src/runtime/complex.go:47) MOVQ $-9223372036854775808, CX obj: 00215 (.../src/runtime/complex.go:47) MOVQ "".n(SP), DX obj: 00216 (.../src/runtime/complex.go:47) ANDQ CX, DX obj: 00217 (.../src/runtime/complex.go:47) ORQ AX, DX Change-Id: I80acf8496a91be4804fb7ef3df04c19baae2754c Reviewed-on: https://go-review.googlesource.com/c/go/+/264660 Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com> Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2020-10-27test: add index bounds check elided with "&^"Cuong Manh Le
For follow up CL, which will defer lowering OANDNOT until SSA. Change-Id: I5a988d0b8f0ae664580f08b123811b2a31ef55c6 Reviewed-on: https://go-review.googlesource.com/c/go/+/265040 Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com> Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2018-05-29test: gofmt bounds.goJosh Bleecher Snyder
Change-Id: I8b462e20064658120afc8eb1cbac926254d1e24e Reviewed-on: https://go-review.googlesource.com/114937 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
2016-05-02all: make copyright headers consistent with one space after periodEmmanuel Odeke
Follows suit with https://go-review.googlesource.com/#/c/20111. Generated by running $ grep -R 'Go Authors. All' * | cut -d":" -f1 | while read F;do perl -pi -e 's/Go Authors. All/Go Authors. All/g' $F;done The code in cmd/internal/unvendor wasn't changed. Fixes #15213 Change-Id: I4f235cee0a62ec435f9e8540a1ec08ae03b1a75f Reviewed-on: https://go-review.googlesource.com/21819 Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
2012-09-24test: prepare for 64-bit intsRuss Cox
Minor tweaks to avoid assuming that int is always 32 bits. Update #2188. R=golang-dev, r CC=golang-dev https://golang.org/cl/6553062
2012-09-23test: expand run.go's errorcheck, make clear which bugs runRuss Cox
Today, if run.go doesn't understand a test header line it just ignores the test, making it too easy to write or edit tests that are not actually being run. - expand errorcheck to accept flags, so that bounds.go and escape*.go can run. - create a whitelist of skippable tests in run.go; skipping others is an error. - mark all skipped tests at top of file. Update #4139. R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/6549054
2012-05-24cmd/gc: faster code, mainly for rotateRuss Cox
* Eliminate bounds check on known small shifts. * Rewrite x<<s | x>>(32-s) as a rotate (constant s). * More aggressive (but still minimal) range analysis. R=ken, dave, iant CC=golang-dev https://golang.org/cl/6209077
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