3897ded714
As described at:
4520524ba0
this commit continues a series of updates of ARC tools.
This time we're updating tools to arc-2016.09-eng007 tag plus a
couple of fixes on top of it that will all make its way in the
next engineering build.
We hope this patch will cure most buildroot ARC failures as it
contains important fixes:
1) PIE fix. We have added PIE support to ARC toolchain at last.
So that should prevent breakage of many packages. As ARC now
supports PIE we remove ARC from BR2_TOOLCHAIN_SUPPORTS_PIE
exclusion in toolchain/Config.in file.
2) Assembler fix. This patch also have changes that fixes frequent
assembler failures, e.g.:
http://autobuild.buildroot.net/results/543/5430b902d900943a34c1888e7e410bd5df367bc2//
We still keep GDB as it is of arc-2016.03 release because there're some
issues we'd like to resolve before releasing it to wider audience.
So again note this is next engineering builds of arc-2016.09 series
and it might have all kinds of breakages, please don't use it for
production builds.
Signed-off-by: Vlad Zakharov <vzakhar@synopsys.com>
[Thomas: remove uClibc PIE patch, since we have bumped uClibc in the
mean time, to a version that contains the PIE fix for ARC.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
112 lines
2.6 KiB
Diff
112 lines
2.6 KiB
Diff
From gcc bugzilla https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60155
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Upstream status: in trunk.
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Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
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--- trunk/gcc/gcse.c 2014/02/12 14:50:06 207726
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+++ trunk/gcc/gcse.c 2014/04/04 22:25:51 209134
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@@ -2502,6 +2502,65 @@
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}
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}
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+struct set_data
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+{
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+ rtx insn;
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+ const_rtx set;
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+ int nsets;
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+};
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+
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+/* Increment number of sets and record set in DATA. */
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+
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+static void
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+record_set_data (rtx dest, const_rtx set, void *data)
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+{
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+ struct set_data *s = (struct set_data *)data;
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+
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+ if (GET_CODE (set) == SET)
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+ {
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+ /* We allow insns having multiple sets, where all but one are
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+ dead as single set insns. In the common case only a single
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+ set is present, so we want to avoid checking for REG_UNUSED
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+ notes unless necessary. */
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+ if (s->nsets == 1
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+ && find_reg_note (s->insn, REG_UNUSED, SET_DEST (s->set))
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+ && !side_effects_p (s->set))
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+ s->nsets = 0;
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+
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+ if (!s->nsets)
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+ {
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+ /* Record this set. */
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+ s->nsets += 1;
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+ s->set = set;
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+ }
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+ else if (!find_reg_note (s->insn, REG_UNUSED, dest)
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+ || side_effects_p (set))
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+ s->nsets += 1;
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+ }
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+}
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+
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+static const_rtx
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+single_set_gcse (rtx insn)
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+{
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+ struct set_data s;
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+ rtx pattern;
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+
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+ gcc_assert (INSN_P (insn));
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+
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+ /* Optimize common case. */
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+ pattern = PATTERN (insn);
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+ if (GET_CODE (pattern) == SET)
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+ return pattern;
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+
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+ s.insn = insn;
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+ s.nsets = 0;
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+ note_stores (pattern, record_set_data, &s);
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+
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+ /* Considered invariant insns have exactly one set. */
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+ gcc_assert (s.nsets == 1);
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+ return s.set;
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+}
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+
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/* Emit move from SRC to DEST noting the equivalence with expression computed
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in INSN. */
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@@ -2509,7 +2568,8 @@
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gcse_emit_move_after (rtx dest, rtx src, rtx insn)
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{
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rtx new_rtx;
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- rtx set = single_set (insn), set2;
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+ const_rtx set = single_set_gcse (insn);
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+ rtx set2;
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rtx note;
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rtx eqv = NULL_RTX;
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@@ -3369,13 +3429,12 @@
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FOR_EACH_VEC_ELT (occrs_to_hoist, j, occr)
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{
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rtx insn;
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- rtx set;
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+ const_rtx set;
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gcc_assert (!occr->deleted_p);
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insn = occr->insn;
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- set = single_set (insn);
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- gcc_assert (set);
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+ set = single_set_gcse (insn);
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/* Create a pseudo-reg to store the result of reaching
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expressions into. Get the mode for the new pseudo
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@@ -3456,10 +3515,8 @@
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{
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rtx reg;
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enum reg_class pressure_class;
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- rtx set = single_set (insn);
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+ const_rtx set = single_set_gcse (insn);
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- /* Considered invariant insns have only one set. */
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- gcc_assert (set != NULL_RTX);
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reg = SET_DEST (set);
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if (GET_CODE (reg) == SUBREG)
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reg = SUBREG_REG (reg);
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