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cmd/compile: branch too far on arm64 #17925

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dvyukov opened this issue Nov 15, 2016 · 4 comments
Closed

cmd/compile: branch too far on arm64 #17925

dvyukov opened this issue Nov 15, 2016 · 4 comments
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FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
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Go1.8

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@dvyukov
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dvyukov commented Nov 15, 2016

go version devel +b687d6a Tue Nov 15 05:35:54 2016 +0000 linux/amd64

Compilation of this file crashes on arm64:
https://gist.githubusercontent.com/dvyukov/85c7fa1b78b89ae2a16b27c3d681653f/raw/94b1ba106e5d748ab4b0efc8cbecc14b240f49fe/gistfile1.txt

$ GOARCH=arm64 compile sys_amd64.go
sys_amd64.go:20611: branch too far 0xc9579 vs 0x40000 [0x0]
00180 (/tmp/sys_amd64.go:1780)	CBNZW	R2, 3298968
3298968 (/tmp/sys_amd64.go:1780)	MOVD	R0, 8(RSP)

amd64 works fine.
@dvyukov
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dvyukov commented Nov 15, 2016

@matt2909

@bradfitz
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@cherrymui, can you triage for Go 1.8 vs Go 1.9?

@cherrymui
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The bug is introduced in b662e52. Marked as Go 1.8. Will try to make a fix.

@cherrymui cherrymui added this to the Go1.8 milestone Nov 15, 2016
@cherrymui cherrymui added the NeedsFix The path to resolution is known, but the work has not been done. label Nov 15, 2016
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CL https://golang.org/cl/33304 mentions this issue.

@golang golang locked and limited conversation to collaborators Nov 16, 2017
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FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
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Go1.8
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@bradfitz @dvyukov @gopherbot @cherrymui