From c33db31d9ad96f6414460315c12b4b505fad5dd7 Mon Sep 17 00:00:00 2001 From: Bernd Edlinger Date: Wed, 21 Apr 2021 14:13:04 +0200 Subject: Fix target/100106 ICE in gen_movdi As the test case shows, the outer mode may have a higher alignment requirement than the inner mode here. 2021-04-27 Bernd Edlinger PR target/100106 * simplify-rtx.c (simplify_context::simplify_subreg): Check the memory alignment for the outer mode. * gcc.c-torture/compile/pr100106.c: New testcase. --- gcc/simplify-rtx.c | 1 + 1 file changed, 1 insertion(+) (limited to 'gcc/simplify-rtx.c') diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index d13c390..ad3b7b2 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -7217,6 +7217,7 @@ simplify_context::simplify_subreg (machine_mode outermode, rtx op, have instruction to move the whole thing. */ && (! MEM_VOLATILE_P (op) || ! have_insn_for (SET, innermode)) + && !(STRICT_ALIGNMENT && MEM_ALIGN (op) < GET_MODE_ALIGNMENT (outermode)) && known_le (outersize, innersize)) return adjust_address_nv (op, outermode, byte); -- cgit v1.1