From 7af52b39059b4496b17337d0efc7575f17febb26 Mon Sep 17 00:00:00 2001 From: Pat Haugen Date: Mon, 17 Oct 2022 14:53:11 -0500 Subject: [PATCH] Fix register count when not splitting Complex IEEE 128-bit args. For ABI_V4, we do not split complex args. This created a problem because even though an arg would be passed in two VSX regs, we were only advancing the function arg counter by one VSX register. Fixed with this patch. (backported commit 2ee68beee709e48fce85b8892ff9985acc6a91a8) gcc/ PR target/99685 * config/rs6000/rs6000-call.c (rs6000_function_arg_advance_1): Bump register count when not splitting IEEE 128-bit Complex. --- gcc/config/rs6000/rs6000-call.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/gcc/config/rs6000/rs6000-call.c b/gcc/config/rs6000/rs6000-call.c index c910ee5c71a6..4e55cbaab55f 100644 --- a/gcc/config/rs6000/rs6000-call.c +++ b/gcc/config/rs6000/rs6000-call.c @@ -6534,6 +6534,12 @@ rs6000_function_arg_advance_1 (CUMULATIVE_ARGS *cum, machine_mode mode, { cum->vregno += n_elts; + /* If we are not splitting Complex IEEE128 args then account for the + fact that they are passed in 2 VSX regs. */ + if (!targetm.calls.split_complex_arg && type + && TREE_CODE (type) == COMPLEX_TYPE && elt_mode == KCmode) + cum->vregno++; + if (!TARGET_ALTIVEC) error ("cannot pass argument in vector register because" " altivec instructions are disabled, use %qs" -- 2.47.2