From 3c20c9bc8a2eb19e97c9d04952d696e7d90a1d63 Mon Sep 17 00:00:00 2001 From: Vladimir Makarov Date: Fri, 20 Feb 2015 18:59:02 +0000 Subject: [PATCH] re PR rtl-optimization/64172 (Wrong code with GCC vector extensions on ARM when compiled without NEON) 2015-02-20 Vladimir Makarov PR target/64172 * ira-color.c (color_pass): Prevent splitting multi-register pseudos. From-SVN: r220877 --- gcc/ChangeLog | 6 ++++++ gcc/ira-color.c | 6 +++++- 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b1bd622..dad8489 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2015-02-20 Vladimir Makarov + + PR target/64172 + * ira-color.c (color_pass): Prevent splitting multi-register + pseudos. + 2015-02-20 Richard Biener PR tree-optimization/65136 diff --git a/gcc/ira-color.c b/gcc/ira-color.c index b77ff69..ff1fe8a 100644 --- a/gcc/ira-color.c +++ b/gcc/ira-color.c @@ -3274,7 +3274,11 @@ color_pass (ira_loop_tree_node_t loop_tree_node) && (loop_tree_node->reg_pressure[pclass] <= ira_class_hard_regs_num[pclass])) || (pic_offset_table_rtx != NULL - && regno == (int) REGNO (pic_offset_table_rtx))) + && regno == (int) REGNO (pic_offset_table_rtx)) + /* Avoid overlapped multi-registers. Moves between them + might result in wrong code generation. */ + || (hard_regno >= 0 + && ira_reg_class_max_nregs[pclass][mode] > 1)) { if (! ALLOCNO_ASSIGNED_P (subloop_allocno)) { -- 2.7.4