From 3968f33b6542cf20cf63cf49bfbc033bd2486295 Mon Sep 17 00:00:00 2001 From: Khem Raj Date: Sun, 12 Jun 2011 20:56:57 -0700 Subject: gcc-4.6.0: Bring in patches from FSF 4.6 branch This brings in new patches from 4.6 release branch updates the comment section of existing branch to not contain patch numbers. Tested build on qemu for arm ppc mips x86 and x86_64 Signed-off-by: Khem Raj --- ...-05-12-Richard-Guenther-rguenther-suse.de.patch | 100 +++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0259-2011-05-12-Richard-Guenther-rguenther-suse.de.patch (limited to 'meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0259-2011-05-12-Richard-Guenther-rguenther-suse.de.patch') diff --git a/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0259-2011-05-12-Richard-Guenther-rguenther-suse.de.patch b/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0259-2011-05-12-Richard-Guenther-rguenther-suse.de.patch new file mode 100644 index 000000000..4754ace97 --- /dev/null +++ b/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0259-2011-05-12-Richard-Guenther-rguenther-suse.de.patch @@ -0,0 +1,100 @@ +From 32e55402bb0fc442831d775a516f2def4f948f93 Mon Sep 17 00:00:00 2001 +From: rguenth +Date: Thu, 12 May 2011 14:08:00 +0000 +Subject: [PATCH] 2011-05-12 Richard Guenther + + Backport from mainline + 2011-05-02 Richard Guenther + + PR tree-optimization/48822 + * tree-ssa-sccvn.c (set_ssa_val_to): Never go up the lattice. + (process_scc): Indicate which iteration we start. + + * gcc.dg/torture/pr48822.c: New testcase. + + +git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@173705 138bc75d-0d04-0410-961f-82ee72b054a4 + +index be253f4..81b52db 100644 +new file mode 100644 +index 0000000..b619f36 +--- /dev/null ++++ b/gcc/testsuite/gcc.dg/torture/pr48822.c +@@ -0,0 +1,20 @@ ++/* { dg-do compile } */ ++ ++void foo (int *, int *); ++int bar () ++{ ++ int a = 0; ++ int b = 0; ++ if (b != 0) ++ { ++ int ax = a; ++ int bx = b; ++ while (bx != 0) ++ { ++ int tem = ax % bx; ++ ax = bx; ++ bx = tem; ++ } ++ } ++ foo (&a, &b); ++} +diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c +index 9222cb5..eb88969 100644 +--- a/gcc/tree-ssa-sccvn.c ++++ b/gcc/tree-ssa-sccvn.c +@@ -2103,12 +2103,26 @@ print_scc (FILE *out, VEC (tree, heap) *scc) + static inline bool + set_ssa_val_to (tree from, tree to) + { +- tree currval; ++ tree currval = SSA_VAL (from); + +- if (from != to +- && TREE_CODE (to) == SSA_NAME +- && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (to)) +- to = from; ++ if (from != to) ++ { ++ if (currval == from) ++ { ++ if (dump_file && (dump_flags & TDF_DETAILS)) ++ { ++ fprintf (dump_file, "Not changing value number of "); ++ print_generic_expr (dump_file, from, 0); ++ fprintf (dump_file, " from VARYING to "); ++ print_generic_expr (dump_file, to, 0); ++ fprintf (dump_file, "\n"); ++ } ++ return false; ++ } ++ else if (TREE_CODE (to) == SSA_NAME ++ && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (to)) ++ to = from; ++ } + + /* The only thing we allow as value numbers are VN_TOP, ssa_names + and invariants. So assert that here. */ +@@ -2125,8 +2139,6 @@ set_ssa_val_to (tree from, tree to) + print_generic_expr (dump_file, to, 0); + } + +- currval = SSA_VAL (from); +- + if (currval != to && !operand_equal_p (currval, to, OEP_PURE_SAME)) + { + VN_INFO (from)->valnum = to; +@@ -3124,6 +3136,8 @@ process_scc (VEC (tree, heap) *scc) + { + changed = false; + iterations++; ++ if (dump_file && (dump_flags & TDF_DETAILS)) ++ fprintf (dump_file, "Starting iteration %d\n", iterations); + /* As we are value-numbering optimistically we have to + clear the expression tables and the simplified expressions + in each iteration until we converge. */ +-- +1.7.0.4 + -- cgit v1.2.3