From 44c389e479e9e226cd7d4e33abf8fda15209c894 Mon Sep 17 00:00:00 2001 From: Jim Wilson Date: Mon, 3 Feb 1997 17:00:11 -0800 Subject: [PATCH] (find_cross_jump): Don't allow old-style and volatile asms to match. From-SVN: r13603 --- gcc/jump.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/gcc/jump.c b/gcc/jump.c index 1d2b3cb7f88..e1382b38e87 100644 --- a/gcc/jump.c +++ b/gcc/jump.c @@ -2605,7 +2605,19 @@ find_cross_jump (e1, e2, minimum, f1, f2) } #endif - if (lose || GET_CODE (p1) != GET_CODE (p2) + /* Don't allow old-style asm or volatile extended asms to be accepted + for cross jumping purposes. It is conceptually correct to allow + them, since cross-jumping preserves the dynamic instruction order + even though it is changing the static instruction order. However, + if an asm is being used to emit an assembler pseudo-op, such as + the MIPS `.set reorder' pseudo-op, then the static instruction order + matters and it must be preserved. */ + if (GET_CODE (p1) == ASM_INPUT || GET_CODE (p2) == ASM_INPUT + || (GET_CODE (p1) == ASM_OPERANDS && MEM_VOLATILE_P (p1)) + || (GET_CODE (p2) == ASM_OPERANDS && MEM_VOLATILE_P (p2))) + lose = 1; + + if (lose || GET_CODE (p1) != GET_CODE (p2) || ! rtx_renumbered_equal_p (p1, p2)) { /* The following code helps take care of G++ cleanups. */ -- 2.30.2