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cmd/compile: tests fail with LEAQ merging disabled #19475

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mundaym opened this issue Mar 9, 2017 · 3 comments
Closed

cmd/compile: tests fail with LEAQ merging disabled #19475

mundaym opened this issue Mar 9, 2017 · 3 comments
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@mundaym
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mundaym commented Mar 9, 2017

This is possibly a red herring but I thought I'd post it anyway just in case it is a real bug. I've been experimenting with disabling address merging ((MOVQload (LEAQ ...) ...) -> (MOVQload ...) rules) and when I do I get a failure in the tests. Something similar happens on s390x.

What version of Go are you using (go version)?

https://go-review.googlesource.com/37990

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/munday/Development/gopath"
GORACE=""
GOROOT="/Users/munday/Development/go/master"
GOTOOLDIR="/Users/munday/Development/go/master/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/q0/9n8rk3pd4hx5cjxcq2rqctvm0000gn/T/go-build139713524=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
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"

What did you do?

Run ./all.bash.

What did you expect to see?

Tests pass (well, maybe not... but not the error I get anyway).

What did you see instead?

# cmd/compile/internal/syntax
cmd/compile/internal/syntax/parser_test.go:33: invalid instruction: 00494 (/Users/munday/Development/go/master/src/cmd/compile/internal/syntax/parser_test.go:70)	MOVUPS	CX, DX
FAIL	cmd/compile/internal/syntax [build failed]

The MOVUPS appears to come from a moveByType call with a 16-byte string type.
@mundaym
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mundaym commented Mar 9, 2017

cc @dr2chase @randall77

@mundaym
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mundaym commented Mar 9, 2017

Looks like this is a typo in the generic rules. I'll send a CL.

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CL https://golang.org/cl/37869 mentions this issue.

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