From 78cf0a232ee4314a9d668aab9b4b54f86b308111 Mon Sep 17 00:00:00 2001 From: Sebastian Pop Date: Thu, 27 Aug 2015 17:11:21 -0500 Subject: port revision 219584 from linaro/gcc-4_9-branch gcc/ 2015-01-14 Yvan Roux Backport from trunk r218451. 2014-12-06 James Greenhalgh Sebastian Pop Brian Rzycki PR tree-optimization/54742 * params.def (max-fsm-thread-path-insns, max-fsm-thread-length, max-fsm-thread-paths): New. * doc/invoke.texi (max-fsm-thread-path-insns, max-fsm-thread-length, max-fsm-thread-paths): Documented. * tree-cfg.c (split_edge_bb_loc): Export. * tree-cfg.h (split_edge_bb_loc): Declared extern. * tree-ssa-threadedge.c (simplify_control_stmt_condition): Restore the original value of cond when simplification fails. (fsm_find_thread_path): New. (fsm_find_control_statement_thread_paths): New. (thread_through_normal_block): Call find_control_statement_thread_paths. * tree-ssa-threadupdate.c (dump_jump_thread_path): Pretty print EDGE_FSM_THREAD. (verify_seme): New. (duplicate_seme_region): New. (thread_through_all_blocks): Generate code for EDGE_FSM_THREAD edges calling duplicate_seme_region. * tree-ssa-threadupdate.h (jump_thread_edge_type): Add EDGE_FSM_THREAD. gcc/testsuite/ 2015-01-14 Yvan Roux Backport from trunk r218451. 2014-12-06 James Greenhalgh Sebastian Pop Brian Rzycki PR tree-optimization/54742 * gcc.dg/tree-ssa/ssa-dom-thread-6.c: New test. * gcc.dg/tree-ssa/ssa-dom-thread-7.c: New test. --- .../testsuite/gcc.dg/tree-ssa/ssa-dom-thread-6.c | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-6.c (limited to 'gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-6.c') diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-6.c b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-6.c new file mode 100644 index 000000000..bb34a7432 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-6.c @@ -0,0 +1,43 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-dom1-details" } */ +/* { dg-final { scan-tree-dump-times "FSM" 6 "dom1" } } */ +/* { dg-final { cleanup-tree-dump "dom1" } } */ + +int sum0, sum1, sum2, sum3; +int foo (char *s, char **ret) +{ + int state=0; + char c; + + for (; *s && state != 4; s++) + { + c = *s; + if (c == '*') + { + s++; + break; + } + switch (state) + { + case 0: + if (c == '+') + state = 1; + else if (c != '-') + sum0+=c; + break; + case 1: + if (c == '+') + state = 2; + else if (c == '-') + state = 0; + else + sum1+=c; + break; + default: + break; + } + + } + *ret = s; + return state; +} -- cgit v1.2.3