re PR rtl-optimization/79916 (ICE in Max. number of generated reload insns per…

re PR rtl-optimization/79916 (ICE in Max. number of generated reload insns per insn is achieved (90))

2018-04-13  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/79916
	* config/rs6000/rs6000.c (rs6000_emit_move): Use assigned hard
	regs (if any) to define how to gnerate SD moves when LRA is in
	progress.

2018-04-13  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/79916
	* gcc.target/powerpc/pr79916.c: New.

From-SVN: r259379

gcc/ChangeLog

+2018-04-13  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/79916
+	* config/rs6000/rs6000.c (rs6000_emit_move): Use assigned hard
+	regs (if any) to define how to gnerate SD moves when LRA is in
+	progress.
+
 2018-04-13  Jakub Jelinek  <jakub@redhat.com>
 
 	PR rtl-optimization/85393

gcc/config/rs6000/rs6000.c

@@ -10610,7 +10610,9 @@ rs6000_emit_move (rtx dest, rtx source, machine_mode mode)
       if (regno >= FIRST_PSEUDO_REGISTER)
 	{
 	  cl = reg_preferred_class (regno);
-	  regno = cl == NO_REGS ? -1 : ira_class_hard_regs[cl][1];
+	  regno = reg_renumber[regno];
+	  if (regno < 0)
+	    regno = cl == NO_REGS ? -1 : ira_class_hard_regs[cl][1];
 	}
       if (regno >= 0 && ! FP_REGNO_P (regno))
 	{
@@ -10635,7 +10637,9 @@ rs6000_emit_move (rtx dest, rtx source, machine_mode mode)
 	{
 	  cl = reg_preferred_class (regno);
 	  gcc_assert (cl != NO_REGS);
-	  regno = ira_class_hard_regs[cl][0];
+	  regno = reg_renumber[regno];
+	  if (regno < 0)
+	    regno = ira_class_hard_regs[cl][0];
 	}
       if (FP_REGNO_P (regno))
 	{
@@ -10664,7 +10668,9 @@ rs6000_emit_move (rtx dest, rtx source, machine_mode mode)
       if (regno >= FIRST_PSEUDO_REGISTER)
 	{
 	  cl = reg_preferred_class (regno);
-	  regno = cl == NO_REGS ? -1 : ira_class_hard_regs[cl][0];
+	  regno = reg_renumber[regno];
+	  if (regno < 0)
+	    regno = cl == NO_REGS ? -1 : ira_class_hard_regs[cl][0];
 	}
       if (regno >= 0 && ! FP_REGNO_P (regno))
 	{
@@ -10689,7 +10695,9 @@ rs6000_emit_move (rtx dest, rtx source, machine_mode mode)
 	{
 	  cl = reg_preferred_class (regno);
 	  gcc_assert (cl != NO_REGS);
-	  regno = ira_class_hard_regs[cl][0];
+	  regno = reg_renumber[regno];
+	  if (regno < 0)
+	    regno = ira_class_hard_regs[cl][0];
 	}
       if (FP_REGNO_P (regno))
 	{

gcc/testsuite/ChangeLog

+2018-04-13  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/79916
+	* gcc.target/powerpc/pr79916.c: New.
+
 2018-04-13  Jakub Jelinek  <jakub@redhat.com>
 
 	PR rtl-optimization/85393