https://bugs.gentoo.org/664014
https://gcc.gnu.org/PR79242

From 59f5415b4462a60d9f2dd6dc5229247da183b9fc Mon Sep 17 00:00:00 2001
From: law <law@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sat, 17 Feb 2018 00:25:15 +0000
Subject: [PATCH] 2018-02-16  Jozef Lawrynowicz <jozefl.gcc@gmail.com>

	PR target/79242
	* machmode.def: Define a complex mode for PARTIAL_INT.
	* genmodes.c (complex_class): Return MODE_COMPLEX_INT for
	MODE_PARTIAL_INT.
	* doc/rtl.texi: Document CSPImode.
	* config/msp430/msp430.c (msp430_hard_regno_nregs): Add CPSImode
	handling.
	(msp430_hard_regno_nregs_with_padding): Likewise.

	PR target/79242
	gcc.target/msp430/pr79242.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-7-branch@257779 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/ChangeLog                             | 11 +++++++++++
 gcc/config/msp430/msp430.c                |  4 ++++
 gcc/doc/rtl.texi                          |  5 +++--
 gcc/genmodes.c                            |  1 +
 gcc/machmode.def                          |  1 +
 gcc/testsuite/ChangeLog                   |  5 +++++
 gcc/testsuite/gcc.target/msp430/pr79242.c | 11 +++++++++++
 7 files changed, 36 insertions(+), 2 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/msp430/pr79242.c

--- a/gcc/config/msp430/msp430.c
+++ b/gcc/config/msp430/msp430.c
@@ -905,6 +905,8 @@ msp430_hard_regno_nregs (int regno ATTRIBUTE_UNUSED,
 {
   if (mode == PSImode && msp430x)
     return 1;
+  if (mode == CPSImode && msp430x)
+    return 2;
   return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1)
 	  / UNITS_PER_WORD);
 }
@@ -927,6 +929,8 @@ msp430_hard_regno_nregs_with_padding (int regno ATTRIBUTE_UNUSED,
 {
   if (mode == PSImode)
     return 2;
+  if (mode == CPSImode)
+    return 4;
   return msp430_hard_regno_nregs (regno, mode);
 }
 
--- a/gcc/genmodes.c
+++ b/gcc/genmodes.c
@@ -116,6 +116,7 @@ complex_class (enum mode_class c)
   switch (c)
     {
     case MODE_INT: return MODE_COMPLEX_INT;
+    case MODE_PARTIAL_INT: return MODE_COMPLEX_INT;
     case MODE_FLOAT: return MODE_COMPLEX_FLOAT;
     default:
       error ("no complex class for class %s", mode_class_names[c]);
--- a/gcc/machmode.def
+++ b/gcc/machmode.def
@@ -243,6 +243,7 @@ UACCUM_MODE (UTA, 16, 64, 64); /* 64.64 */
 
 /* Complex modes.  */
 COMPLEX_MODES (INT);
+COMPLEX_MODES (PARTIAL_INT);
 COMPLEX_MODES (FLOAT);
 
 /* Decimal floating point modes.  */