re PR rtl-optimization/78547 (ICE: in loc_cmp, at var-tracking.c:3417 with -Os -g -mstringop-strategy=libcall -freorder-blocks-algorithm=simple)

	PR rtl-optimization/78547
	* emit-rtl.c (unshare_all_rtl): Make sure DECL_RTL and
	DECL_INCOMING_RTL is not shared.
	* config/i386/i386.c (convert_scalars_to_vectors): If any
	insns have been converted, adjust all parameter's DEC_RTL and
	DECL_INCOMING_RTL back from V1TImode to TImode if the parameters have
	TImode.

	* gcc.dg/pr78547.c: New test.

From-SVN: r243165

5 files changed, 59 insertions, 0 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a83f528..260a66d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,13 @@
 2016-12-02  Jakub Jelinek  <jakub@redhat.com>
 
+	PR rtl-optimization/78547
+	* emit-rtl.c (unshare_all_rtl): Make sure DECL_RTL and
+	DECL_INCOMING_RTL is not shared.
+	* config/i386/i386.c (convert_scalars_to_vectors): If any
+	insns have been converted, adjust all parameter's DEC_RTL and
+	DECL_INCOMING_RTL back from V1TImode to TImode if the parameters have
+	TImode.
+
 	PR rtl-optimization/78575
 	* config/i386/i386.c (timode_scalar_chain::fix_debug_reg_uses): Use
 	DF infrastructure to wrap all V1TImode reg uses into TImode subreg
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 5226e454..5678fa2 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -4075,6 +4075,28 @@ convert_scalars_to_vector ()
 	crtl->stack_alignment_needed = 128;
       if (crtl->stack_alignment_estimated < 128)
 	crtl->stack_alignment_estimated = 128;
+      /* Fix up DECL_RTL/DECL_INCOMING_RTL of arguments.  */
+      if (TARGET_64BIT)
+	for (tree parm = DECL_ARGUMENTS (current_function_decl);
+	     parm; parm = DECL_CHAIN (parm))
+	  {
+	    if (TYPE_MODE (TREE_TYPE (parm)) != TImode)
+	      continue;
+	    if (DECL_RTL_SET_P (parm)
+		&& GET_MODE (DECL_RTL (parm)) == V1TImode)
+	      {
+		rtx r = DECL_RTL (parm);
+		if (REG_P (r))
+		  SET_DECL_RTL (parm, gen_rtx_SUBREG (TImode, r, 0));
+	      }
+	    if (DECL_INCOMING_RTL (parm)
+		&& GET_MODE (DECL_INCOMING_RTL (parm)) == V1TImode)
+	      {
+		rtx r = DECL_INCOMING_RTL (parm);
+		if (REG_P (r))
+		  DECL_INCOMING_RTL (parm) = gen_rtx_SUBREG (TImode, r, 0);
+	      }
+	  }
     }
 
   return 0;
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 02512d3..d2ac88b 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -2668,6 +2668,14 @@ unsigned int
 unshare_all_rtl (void)
 {
   unshare_all_rtl_1 (get_insns ());
+
+  for (tree decl = DECL_ARGUMENTS (cfun->decl); decl; decl = DECL_CHAIN (decl))
+    {
+      if (DECL_RTL_SET_P (decl))
+	SET_DECL_RTL (decl, copy_rtx_if_shared (DECL_RTL (decl)));
+      DECL_INCOMING_RTL (decl) = copy_rtx_if_shared (DECL_INCOMING_RTL (decl));
+    }
+
   return 0;
 }
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 6ee4b13..490d081 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2016-12-02  Jakub Jelinek  <jakub@redhat.com>
 
+	PR rtl-optimization/78547
+	* gcc.dg/pr78547.c: New test.
+
 	PR rtl-optimization/78575
 	* gcc.dg/pr78575.c: New test.
 
diff --git a/gcc/testsuite/gcc.dg/pr78547.c b/gcc/testsuite/gcc.dg/pr78547.c
new file mode 100644
index 0000000..9300cbc
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr78547.c
@@ -0,0 +1,18 @@
+/* PR rtl-optimization/78547 */
+/* { dg-do compile { target int128 } } */
+/* { dg-options "-Os -g -freorder-blocks-algorithm=simple -Wno-psabi" } */
+/* { dg-additional-options "-mstringop-strategy=libcall" { target i?86-*-* x86_64-*-* } } */
+
+typedef unsigned __int128 u128;
+typedef unsigned __int128 V __attribute__ ((vector_size (64)));
+
+V
+foo (u128 a, u128 b, u128 c, V d)
+{
+  V e = (V) {a};
+  V f = e & 1;
+  e = 0 != e;
+  c = c;
+  f = f << ((V) {c} & 7);
+  return f + e;
+}