From 6d49a073b49d3f2f467ebf6cc36ec12f8a3ec012 Mon Sep 17 00:00:00 2001 From: Jim Wilson Date: Thu, 22 Jan 1998 14:48:58 +0000 Subject: Fix powerpc/rs6000 (subreg:SF (mem:SI ...)) reload problem. * reload.c (push_reload): In WORD_REGISTER_OPERATIONS code, add test to require the SUBREG mode to be smaller than the SUBREG_REG mode. * reload1.c (eliminate_regs): Likewise. From-SVN: r17444 --- gcc/reload1.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) (limited to 'gcc/reload1.c') diff --git a/gcc/reload1.c b/gcc/reload1.c index 6de93b9..01263c8 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -3122,17 +3122,19 @@ eliminate_regs (x, mem_mode, insn) int new_size = GET_MODE_SIZE (GET_MODE (new)); if (GET_CODE (new) == MEM - && x_size <= new_size + && ((x_size < new_size #ifdef WORD_REGISTER_OPERATIONS - /* On these machines, combine can create rtl of the form - (set (subreg:m1 (reg:m2 R) 0) ...) - where m1 < m2, and expects something interesting to - happen to the entire word. Moreover, it will use the - (reg:m2 R) later, expecting all bits to be preserved. - So if the number of words is the same, preserve the - subreg so that push_reloads can see it. */ - && ! ((x_size-1)/UNITS_PER_WORD == (new_size-1)/UNITS_PER_WORD) + /* On these machines, combine can create rtl of the form + (set (subreg:m1 (reg:m2 R) 0) ...) + where m1 < m2, and expects something interesting to + happen to the entire word. Moreover, it will use the + (reg:m2 R) later, expecting all bits to be preserved. + So if the number of words is the same, preserve the + subreg so that push_reloads can see it. */ + && ! ((x_size-1)/UNITS_PER_WORD == (new_size-1)/UNITS_PER_WORD) #endif + ) + || (x_size == new_size)) #ifdef LOAD_EXTEND_OP /* On these machines we will be reloading what is inside the SUBREG if it originally was a pseudo and -- cgit v1.1