From: David Edelsohn <dje.gcc@gmail.com>
Date: Tue, 4 Dec 2018 15:51:51 +0000 (+0000)
Subject: re PR target/61976 (aix64: Data corruption in struct passed by value)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b1e2e9063fc3e3ca32a91afeb3c8069586e15ddc;p=gcc.git

re PR target/61976 (aix64: Data corruption in struct passed by value)

        PR target/61976
        * config/rs6000/rs6000.c (rs6000_function_arg): Don't pass aggregates
        in FPRs on AIX.
        (rs6000_arg_partial_bytes): Same.

From-SVN: r266786
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1214f443997..bbfe5ae3056 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2018-12-04  David Edelsohn  <dje.gcc@gmail.com>
+
+	PR target/61976
+	* config/rs6000/rs6000.c (rs6000_function_arg): Don't pass aggregates
+	in FPRs on AIX.
+	(rs6000_arg_partial_bytes): Same.
+
 2018-12-04  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR target/88282
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 03b983b6d60..4e35a05bb38 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -11989,7 +11989,8 @@ rs6000_function_arg (cumulative_args_t cum_v, machine_mode mode,
       if (elt_mode == TDmode && (cum->fregno % 2) == 1)
 	cum->fregno++;
 
-      if (USE_FP_FOR_ARG_P (cum, elt_mode))
+      if (USE_FP_FOR_ARG_P (cum, elt_mode)
+	  && !(TARGET_AIX && AGGREGATE_TYPE_P (type)))
 	{
 	  rtx rvec[GP_ARG_NUM_REG + AGGR_ARG_NUM_REG + 1];
 	  rtx r, off;
@@ -12125,7 +12126,8 @@ rs6000_arg_partial_bytes (cumulative_args_t cum_v, machine_mode mode,
 
   align_words = rs6000_parm_start (mode, type, cum->words);
 
-  if (USE_FP_FOR_ARG_P (cum, elt_mode))
+  if (USE_FP_FOR_ARG_P (cum, elt_mode)
+      && !(TARGET_AIX && AGGREGATE_TYPE_P (type)))
     {
       unsigned long n_fpreg = (GET_MODE_SIZE (elt_mode) + 7) >> 3;