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cmd/compile: out of fixed registers on amd64 and arm #10088

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dvyukov opened this issue Mar 5, 2015 · 3 comments
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cmd/compile: out of fixed registers on amd64 and arm #10088

dvyukov opened this issue Mar 5, 2015 · 3 comments
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@dvyukov
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dvyukov commented Mar 5, 2015

go version devel +7be32d0 Wed Mar 4 18:24:53 2015 +0000 linux/amd64

The following program crashes compiler with "internal compiler error: out of fixed registers" on amd64 and arm but not on 386.

package main
func main() {
    type X struct {
        f int
    }
    var x X
    var xx []X
    var s0 []int
    var s1 []func()
    var s2 [][][]int
    var s3 [][]int
    var s4 [][]int16
    s1[xx[int(s4[0][s0[s3[s0[s2[s3[s0[s0[s0[x.f]]-1]+1][0]-1][0][0]]-1][0]]+1])].f-1]() 
}
@dvyukov dvyukov added this to the Go1.5 milestone Mar 5, 2015
@rsc rsc modified the milestones: Unplanned, Go1.5 May 19, 2015
@rsc
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rsc commented May 19, 2015

There is basically no benefit to trying to fix this at this point in the cycle, and it might introduce real bugs. Also, since this code is basically in maintenance mode pending Keith's new SSA-based code generation, it's not clear we should spend any time fixing corner cases like this at all. Removed milestone.

@rsc rsc changed the title cmd/gc: out of fixed registers on amd64 and arm cmd/compile: out of fixed registers on amd64 and arm Jun 8, 2015
@odeke-em
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Duplicate of #8355? cc @griesemer.

@griesemer
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@odeke-em Sure. Closing as duplicate of #8355.

@griesemer griesemer mentioned this issue Aug 12, 2016
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