re PR target/64205 (powerpc64-linux --with-cpu=G5 bootstrap failure)

[gcc]
2015-02-06  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/64205
	* config/rs6000/rs6000.c (rs6000_init_hard_regno_mode_ok): Do not
	add a general secondary reload handler for SDmode, unless we have
	both read/write support for SDmode.

[gcc/testsuite]
2015-02-06  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/64205
	* gcc.target/powerpc/pr64205.c: New file.

From-SVN: r220485

gcc/ChangeLog

+2015-02-06  Michael Meissner  <meissner@linux.vnet.ibm.com>
+
+	PR target/64205
+	* config/rs6000/rs6000.c (rs6000_init_hard_regno_mode_ok): Do not
+	add a general secondary reload handler for SDmode, unless we have
+	both read/write support for SDmode.
+
 2015-02-06  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/64937
@@ -23,7 +30,7 @@
 	(h8300_push_pop): Corresponding changes.
 	(h8300_expand_prologue): Likewise.
 	(h8300_swap_into_er6): Likewise.  Do not set RTX_FRAME_RELATED_P.
-		
+
 2015-02-06  Jakub Jelinek  <jakub@redhat.com>
 
 	PR rtl-optimization/64957

gcc/config/rs6000/rs6000.c

@@ -2849,8 +2849,14 @@ rs6000_init_hard_regno_mode_ok (bool global_init_p)
 	  reg_addr[DDmode].reload_load     = CODE_FOR_reload_dd_di_load;
 	  reg_addr[SFmode].reload_store    = CODE_FOR_reload_sf_di_store;
 	  reg_addr[SFmode].reload_load     = CODE_FOR_reload_sf_di_load;
-	  reg_addr[SDmode].reload_store    = CODE_FOR_reload_sd_di_store;
-	  reg_addr[SDmode].reload_load     = CODE_FOR_reload_sd_di_load;
+
+	  /* Only provide a reload handler for SDmode if lfiwzx/stfiwx are
+	     available.  */
+	  if (TARGET_NO_SDMODE_STACK)
+	    {
+	      reg_addr[SDmode].reload_store = CODE_FOR_reload_sd_di_store;
+	      reg_addr[SDmode].reload_load  = CODE_FOR_reload_sd_di_load;
+	    }
 
 	  if (TARGET_VSX_TIMODE)
 	    {
@@ -2903,8 +2909,14 @@ rs6000_init_hard_regno_mode_ok (bool global_init_p)
 	  reg_addr[DDmode].reload_load     = CODE_FOR_reload_dd_si_load;
 	  reg_addr[SFmode].reload_store    = CODE_FOR_reload_sf_si_store;
 	  reg_addr[SFmode].reload_load     = CODE_FOR_reload_sf_si_load;
-	  reg_addr[SDmode].reload_store    = CODE_FOR_reload_sd_si_store;
-	  reg_addr[SDmode].reload_load     = CODE_FOR_reload_sd_si_load;
+
+	  /* Only provide a reload handler for SDmode if lfiwzx/stfiwx are
+	     available.  */
+	  if (TARGET_NO_SDMODE_STACK)
+	    {
+	      reg_addr[SDmode].reload_store = CODE_FOR_reload_sd_si_store;
+	      reg_addr[SDmode].reload_load  = CODE_FOR_reload_sd_si_load;
+	    }
 
 	  if (TARGET_VSX_TIMODE)
 	    {

gcc/testsuite/ChangeLog

+2015-02-06  Michael Meissner  <meissner@linux.vnet.ibm.com>
+
+	PR target/64205
+	* gcc.target/powerpc/pr64205.c: New file.
+
 2015-02-06  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.target/i386/pr64317.c: Compile for 32bit *-*-linux* targets.

gcc/testsuite/gcc.target/powerpc/pr64205.c

+/* { dg-do compile { target { powerpc*-*-* && ilp32 } } } */
+/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=G5" } } */
+/* { dg-options "-O2 -mcpu=G5 -maltivec -m32" } */
+
+union ieee754r_Decimal32
+{
+  _Decimal32 sd;
+  unsigned int cc0;
+};
+
+unsigned int
+__decoded32 (_Decimal32 a)
+{
+    union ieee754r_Decimal32 d;
+    d.sd = a;
+    return d.cc0;
+}