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authorAlexey Neyman <stilor@att.net>2017-02-28 19:08:24 (GMT)
committerGitHub <noreply@github.com>2017-02-28 19:08:24 (GMT)
commitc8b355ea925cfea1f6ff00e2edef4f0afa0f76a7 (patch)
treeee8b04c33cf0797e985d0f5476d310e9abb8ba78 /patches/gcc/linaro-4.8-2015.06/842-PR60155.patch
parented7e671013eae3ffa7e683de9470b5cf80d3cb4f (diff)
parent99283866cc84102f22324a751a2ba3afb9221cb6 (diff)
Merge pull request #622 from stilor/missing-linaro-patches
Add patches to Linaro GCC
Diffstat (limited to 'patches/gcc/linaro-4.8-2015.06/842-PR60155.patch')
-rw-r--r--patches/gcc/linaro-4.8-2015.06/842-PR60155.patch111
1 files changed, 111 insertions, 0 deletions
diff --git a/patches/gcc/linaro-4.8-2015.06/842-PR60155.patch b/patches/gcc/linaro-4.8-2015.06/842-PR60155.patch
new file mode 100644
index 0000000..7bc2122
--- /dev/null
+++ b/patches/gcc/linaro-4.8-2015.06/842-PR60155.patch
@@ -0,0 +1,111 @@
+From gcc bugzilla https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60155
+Upstream status: in trunk.
+
+Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+
+--- trunk/gcc/gcse.c 2014/02/12 14:50:06 207726
++++ trunk/gcc/gcse.c 2014/04/04 22:25:51 209134
+@@ -2502,6 +2502,65 @@
+ }
+ }
+
++struct set_data
++{
++ rtx insn;
++ const_rtx set;
++ int nsets;
++};
++
++/* Increment number of sets and record set in DATA. */
++
++static void
++record_set_data (rtx dest, const_rtx set, void *data)
++{
++ struct set_data *s = (struct set_data *)data;
++
++ if (GET_CODE (set) == SET)
++ {
++ /* We allow insns having multiple sets, where all but one are
++ dead as single set insns. In the common case only a single
++ set is present, so we want to avoid checking for REG_UNUSED
++ notes unless necessary. */
++ if (s->nsets == 1
++ && find_reg_note (s->insn, REG_UNUSED, SET_DEST (s->set))
++ && !side_effects_p (s->set))
++ s->nsets = 0;
++
++ if (!s->nsets)
++ {
++ /* Record this set. */
++ s->nsets += 1;
++ s->set = set;
++ }
++ else if (!find_reg_note (s->insn, REG_UNUSED, dest)
++ || side_effects_p (set))
++ s->nsets += 1;
++ }
++}
++
++static const_rtx
++single_set_gcse (rtx insn)
++{
++ struct set_data s;
++ rtx pattern;
++
++ gcc_assert (INSN_P (insn));
++
++ /* Optimize common case. */
++ pattern = PATTERN (insn);
++ if (GET_CODE (pattern) == SET)
++ return pattern;
++
++ s.insn = insn;
++ s.nsets = 0;
++ note_stores (pattern, record_set_data, &s);
++
++ /* Considered invariant insns have exactly one set. */
++ gcc_assert (s.nsets == 1);
++ return s.set;
++}
++
+ /* Emit move from SRC to DEST noting the equivalence with expression computed
+ in INSN. */
+
+@@ -2509,7 +2568,8 @@
+ gcse_emit_move_after (rtx dest, rtx src, rtx insn)
+ {
+ rtx new_rtx;
+- rtx set = single_set (insn), set2;
++ const_rtx set = single_set_gcse (insn);
++ rtx set2;
+ rtx note;
+ rtx eqv = NULL_RTX;
+
+@@ -3369,13 +3429,12 @@
+ FOR_EACH_VEC_ELT (occrs_to_hoist, j, occr)
+ {
+ rtx insn;
+- rtx set;
++ const_rtx set;
+
+ gcc_assert (!occr->deleted_p);
+
+ insn = occr->insn;
+- set = single_set (insn);
+- gcc_assert (set);
++ set = single_set_gcse (insn);
+
+ /* Create a pseudo-reg to store the result of reaching
+ expressions into. Get the mode for the new pseudo
+@@ -3456,10 +3515,8 @@
+ {
+ rtx reg;
+ enum reg_class pressure_class;
+- rtx set = single_set (insn);
++ const_rtx set = single_set_gcse (insn);
+
+- /* Considered invariant insns have only one set. */
+- gcc_assert (set != NULL_RTX);
+ reg = SET_DEST (set);
+ if (GET_CODE (reg) == SUBREG)
+ reg = SUBREG_REG (reg);