From ff7848297eb1516dca6f023766866c8e6771d57f Mon Sep 17 00:00:00 2001 From: Jakub Jelinek Date: Tue, 15 Jan 2013 10:31:28 +0100 Subject: [PATCH] re PR tree-optimization/55955 (ICE in optab_for_tree_code, at optabs.c:402) PR tree-optimization/55955 * tree-vect-loop.c (vectorizable_reduction): Give up early on *SHIFT_EXPR and *ROTATE_EXPR codes. * gcc.c-torture/compile/pr55955.c: New test. From-SVN: r195190 --- gcc/ChangeLog | 4 ++++ gcc/testsuite/ChangeLog | 5 +++++ gcc/testsuite/gcc.c-torture/compile/pr55955.c | 12 ++++++++++++ gcc/tree-vect-loop.c | 11 +++++++++++ 4 files changed, 32 insertions(+) create mode 100644 gcc/testsuite/gcc.c-torture/compile/pr55955.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6b4f1d4..ea0e4fa 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,9 @@ 2013-01-15 Jakub Jelinek + PR tree-optimization/55955 + * tree-vect-loop.c (vectorizable_reduction): Give up early on + *SHIFT_EXPR and *ROTATE_EXPR codes. + PR tree-optimization/48766 * opts.c (common_handle_option): For -fwrapv disable -ftrapv, for -ftrapv disable -fwrapv. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 26a479b..a80f16b 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2013-01-15 Jakub Jelinek + + PR tree-optimization/55955 + * gcc.c-torture/compile/pr55955.c: New test. + 2013-01-15 Dodji Seketeli PR c++/55663 diff --git a/gcc/testsuite/gcc.c-torture/compile/pr55955.c b/gcc/testsuite/gcc.c-torture/compile/pr55955.c new file mode 100644 index 0000000..2656ffb --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/pr55955.c @@ -0,0 +1,12 @@ +/* PR tree-optimization/55955 */ + +int b; + +void +foo (int x) +{ + int a; + for (a = x; a < 2; a++) + for (b = 0; b < 2; b++) + *(unsigned short *) 0x100000UL %= 46; +} diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 3a470e3..d4f6bc7 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -4776,6 +4776,17 @@ vectorizable_reduction (gimple stmt, gimple_stmt_iterator *gsi, { /* 4. Supportable by target? */ + if (code == LSHIFT_EXPR || code == RSHIFT_EXPR + || code == LROTATE_EXPR || code == RROTATE_EXPR) + { + /* Shifts and rotates are only supported by vectorizable_shifts, + not vectorizable_reduction. */ + if (dump_enabled_p ()) + dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location, + "unsupported shift or rotation."); + return false; + } + /* 4.1. check support for the operation in the loop */ optab = optab_for_tree_code (code, vectype_in, optab_default); if (!optab) -- 2.7.4