84 lines
2.2 KiB
Diff
84 lines
2.2 KiB
Diff
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From f00b0f17d6889d811468c2c77508fbea8bfc377d Mon Sep 17 00:00:00 2001
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From: Claudiu Zissulescu <claziss@synopsys.com>
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Date: Tue, 19 Jan 2016 14:40:16 +0100
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Subject: [PATCH] UPDATE1: Fix handling complex PIC moves.
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The arc_legitimate_pc_offset_p condition is too lax. Updated it.
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The fix is done in development tree: [arc-4.8-dev f00b0f1]
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and will be a part of the next release of ARC GNU tools.
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Once that new release happens this patch must be removed.
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gcc/
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2016-01-18 Claudiu Zissulescu <claziss@synopsys.com>
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* config/arc/arc.c (arc_needs_pcl_p ): New function
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(arc_legitimate_pc_offset_p): Use arc_needs_pcl_p.
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---
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gcc/config/arc/arc.c | 42 ++++++++++++++++++++++++++++++++++++++++--
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1 file changed, 40 insertions(+), 2 deletions(-)
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diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
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index f7cae9f..18d88a3 100644
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--- a/gcc/config/arc/arc.c
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+++ b/gcc/config/arc/arc.c
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@@ -5234,6 +5234,45 @@ arc_rtx_costs (rtx x, int code, int outer_code, int opno ATTRIBUTE_UNUSED,
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}
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}
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+/* Helper used by arc_legitimate_pc_offset_p. */
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+
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+static bool
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+arc_needs_pcl_p (rtx x)
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+{
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+ register const char *fmt;
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+ register int i, j;
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+
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+ if ((GET_CODE (x) == UNSPEC)
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+ && (XVECLEN (x, 0) == 1)
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+ && (GET_CODE (XVECEXP (x, 0, 0)) == SYMBOL_REF))
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+ switch (XINT (x, 1))
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+ {
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+ case ARC_UNSPEC_GOT:
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+ case ARC_UNSPEC_GOTOFFPC:
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+ case UNSPEC_TLS_GD:
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+ case UNSPEC_TLS_IE:
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+ return true;
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+ default:
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+ break;
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+ }
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+
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+ fmt = GET_RTX_FORMAT (GET_CODE (x));
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+ for (i = GET_RTX_LENGTH (GET_CODE (x)) - 1; i >= 0; i--)
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+ {
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+ if (fmt[i] == 'e')
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+ {
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+ if (arc_needs_pcl_p (XEXP (x, i)))
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+ return true;
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+ }
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+ else if (fmt[i] == 'E')
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+ for (j = XVECLEN (x, i) - 1; j >= 0; j--)
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+ if (arc_needs_pcl_p (XVECEXP (x, i, j)))
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+ return true;
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+ }
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+
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+ return false;
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+}
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+
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/* Return true if ADDR is an address that needs to be expressed as an
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explicit sum of pcl + offset. */
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@@ -5242,8 +5281,7 @@ arc_legitimate_pc_offset_p (rtx addr)
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{
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if (GET_CODE (addr) != CONST)
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return false;
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- addr = XEXP (addr, 0);
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- return flag_pic && !arc_raw_symbolic_reference_mentioned_p (addr, false);
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+ return arc_needs_pcl_p (addr);
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}
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/* Return true if ADDR is a valid pic address.
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--
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2.5.0
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