From: J"orn Rennecke Date: Fri, 29 Jan 1999 19:27:51 +0000 (+0000) Subject: * loop.c (strength_reduce): Size reg_map according to reg_iv_type. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=97ec0ad883d536fc349b52d6e07c6db3e305a20d;p=gcc.git * loop.c (strength_reduce): Size reg_map according to reg_iv_type. From-SVN: r24910 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index af182758c50..fdd20095c48 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +Sat Jan 30 03:24:37 1999 J"orn Rennecke + + * loop.c (strength_reduce): Size reg_map according to reg_iv_type. + Fri Jan 29 18:26:07 1999 Dave Brolley * emit-rtl.c (remove_insn): New function. diff --git a/gcc/loop.c b/gcc/loop.c index b0e7e87c923..109ededbba1 100644 --- a/gcc/loop.c +++ b/gcc/loop.c @@ -3666,6 +3666,7 @@ strength_reduce (scan_start, end, loop_top, insn_count, int threshold = (loop_has_call ? 1 : 2) * (3 + n_non_fixed_regs); /* Map of pseudo-register replacements. */ rtx *reg_map; + int reg_map_size; int call_seen; rtx test; rtx end_insert_before; @@ -4419,9 +4420,12 @@ strength_reduce (scan_start, end, loop_top, insn_count, so that "decrement and branch until zero" insn can be used. */ check_dbra_loop (loop_end, insn_count, loop_start, loop_info); - /* Create reg_map to hold substitutions for replaceable giv regs. */ - reg_map = (rtx *) alloca (max_reg_before_loop * sizeof (rtx)); - bzero ((char *) reg_map, max_reg_before_loop * sizeof (rtx)); + /* Create reg_map to hold substitutions for replaceable giv regs. + Some givs might have been made from biv increments, so look at + reg_iv_type for a suitable size. */ + reg_map_size = reg_iv_type->num_elements; + reg_map = (rtx *) alloca (reg_map_size * sizeof (rtx)); + bzero ((char *) reg_map, reg_map_size * sizeof (rtx)); /* Examine each iv class for feasibility of strength reduction/induction variable elimination. */ @@ -4962,8 +4966,8 @@ strength_reduce (scan_start, end, loop_top, insn_count, if (GET_CODE (p) == INSN || GET_CODE (p) == JUMP_INSN || GET_CODE (p) == CALL_INSN) { - replace_regs (PATTERN (p), reg_map, max_reg_before_loop, 0); - replace_regs (REG_NOTES (p), reg_map, max_reg_before_loop, 0); + replace_regs (PATTERN (p), reg_map, reg_map_size, 0); + replace_regs (REG_NOTES (p), reg_map, reg_map_size, 0); INSN_CODE (p) = -1; }