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1 From 8b3f554d869e1d6e7a0bd1574135402cfc6dc1a3 Mon Sep 17 00:00:00 2001 |
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2 From: Michael Hudson-Doyle <[email protected]> |
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3 Date: Mon, 5 Oct 2015 16:07:59 +1300 |
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4 Subject: [PATCH 38/63] [release-branch.go1.5] cmd/compile: do not let regopt |
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5 use REGTMP on ppc64 |
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6 |
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7 ppc64 codegen assumes that it is OK to stomp on r31 at any time, but it is not |
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8 excluded from the set of registers that regopt is allowed to use. |
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9 |
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10 Fixes #12597 |
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11 |
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12 Change-Id: I29c7655e32abd22f3c21d88427b73e4fca055233 |
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13 Reviewed-on: https://go-review.googlesource.com/15245 |
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14 Reviewed-by: Minux Ma <[email protected]> |
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15 Reviewed-on: https://go-review.googlesource.com/16981 |
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16 Run-TryBot: Austin Clements <[email protected]> |
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17 Reviewed-by: Ian Lance Taylor <[email protected]> |
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18 Reviewed-by: Russ Cox <[email protected]> |
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19 --- |
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20 src/cmd/compile/internal/ppc64/reg.go | 2 +- |
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21 1 file changed, 1 insertion(+), 1 deletion(-) |
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22 |
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23 diff --git a/src/cmd/compile/internal/ppc64/reg.go b/src/cmd/compile/internal/ppc64/reg.go |
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24 index fa1cb71..a301836 100644 |
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25 --- a/src/cmd/compile/internal/ppc64/reg.go |
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26 +++ b/src/cmd/compile/internal/ppc64/reg.go |
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27 @@ -111,7 +111,7 @@ func regnames(n *int) []string { |
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28 |
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29 func excludedregs() uint64 { |
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30 // Exclude registers with fixed functions |
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31 - regbits := uint64(1<<0 | RtoB(ppc64.REGSP) | RtoB(ppc64.REGG) | RtoB(ppc64.REGTLS)) |
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32 + regbits := uint64(1<<0 | RtoB(ppc64.REGSP) | RtoB(ppc64.REGG) | RtoB(ppc64.REGTLS) | RtoB(ppc64.REGTMP)) |
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33 |
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34 // Also exclude floating point registers with fixed constants |
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35 regbits |= RtoB(ppc64.REG_F27) | RtoB(ppc64.REG_F28) | RtoB(ppc64.REG_F29) | RtoB(ppc64.REG_F30) | RtoB(ppc64.REG_F31) |
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36 -- |
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37 2.6.1 |
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38 |