cmd/internal/obj/arm64: assembler parses ARM64 vector register arrangement incorrectly. #24249
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Change https://golang.org/cl/98555 mentions this issue: |
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Change https://golang.org/cl/100115 mentions this issue: |
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Please answer these questions before submitting your issue. Thanks!
What version of Go are you using (
go version)?go version devel +80bfb75 Sun Mar 4 01:05:02 2018 +0000 linux/arm64
Does this issue reproduce with the latest release?
yes
What operating system and processor architecture are you using (
go env)?GOARCH="arm64"
GOBIN=""
GOCACHE="/home/fanzha02/.cache/go-build"
GOEXE=""
GOHOSTARCH="arm64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/fanzha02/go"
GORACE=""
GOROOT="/mnt/share/homes/fanzha02/optimize/micro_benchmark/golang"
GOTMPDIR=""
GOTOOLDIR="/mnt/share/homes/fanzha02/optimize/micro_benchmark/golang/pkg/tool/linux_arm64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build873870783=/tmp/go-build -gno-record-gcc-switches"
What did you do?
1, add a case " VLD1 (R30), [V15.S2,V16.S2] // cfab400c" in the test file arm64.s
2, go test -run "ARM64EndToEnd"
If possible, provide a recipe for reproducing the error.
A complete runnable program is good.
A link on play.golang.org is best.
What did you expect to see?
the test is ok.
What did you see instead?
the test is failed and assembler reports the error as below.
--- FAIL: TestARM64EndToEnd (0.01s)
endtoend_test.go:156: mismatched output:
have 00002 (testdata/arm64.s:21) VLD1 (R30), [V15.H4,V16.H4]
want 00002 (testdata/arm64.s:21) VLD1 (R30), [V15.S2,V16.S2]
endtoend_test.go:228: 00000 (testdata/arm64.s:21) VLD1 (R30), [V15.H4,V16.H4]: have encoding cfa7400c, want cfab400c
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