https://gcc.gnu.org/PR91472
Fix gmp test suite failrues.

From 0a09a00c87081e0a8d1d382b33bb0b1ec03875e7 Mon Sep 17 00:00:00 2001
From: ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sun, 1 Sep 2019 12:55:22 +0000
Subject: [PATCH] 	PR target/91472 	* config/sparc/sparc.c
 (sparc_cannot_force_const_mem): Return true 	during LRA/reload in PIC mode
 if the PIC register hasn't been used yet. 	(sparc_pic_register_p): Test
 reload_in_progress for consistency's sake.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@275270 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/config/sparc/sparc.c                      |  9 ++++-
 .../gcc.c-torture/execute/20190901-1.c        | 36 +++++++++++++++++++

--- a/gcc/config/sparc/sparc.c
+++ b/gcc/config/sparc/sparc.c
@@ -4201,6 +4201,13 @@ eligible_for_sibcall_delay (rtx_insn *trial)
 static bool
 sparc_cannot_force_const_mem (machine_mode mode, rtx x)
 {
+  /* After IRA has run in PIC mode, it is too late to put anything into the
+     constant pool if the PIC register hasn't already been initialized.  */
+  if ((lra_in_progress || reload_in_progress)
+      && flag_pic
+      && !crtl->uses_pic_offset_table)
+    return true;
+
   switch (GET_CODE (x))
     {
     case CONST_INT:
@@ -4450,7 +4457,7 @@ sparc_pic_register_p (rtx x)
     return true;
 
   if (!HARD_REGISTER_P (pic_offset_table_rtx)
-      && (HARD_REGISTER_P (x) || lra_in_progress)
+      && (HARD_REGISTER_P (x) || lra_in_progress || reload_in_progress)
       && ORIGINAL_REGNO (x) == REGNO (pic_offset_table_rtx))
     return true;
 
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/20190901-1.c
@@ -0,0 +1,36 @@
+/* PR target/91472 */
+/* Reported by John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> */
+
+typedef unsigned int gmp_uint_least32_t;
+
+union ieee_double_extract
+{
+  struct
+    {
+      gmp_uint_least32_t sig:1;
+      gmp_uint_least32_t exp:11;
+      gmp_uint_least32_t manh:20;
+      gmp_uint_least32_t manl:32;
+    } s;
+  double d;
+};
+
+double __attribute__((noipa))
+tests_infinity_d (void)
+{
+  union ieee_double_extract x;
+  x.s.exp = 2047;
+  x.s.manl = 0;
+  x.s.manh = 0;
+  x.s.sig = 0;
+  return x.d;
+}
+
+int
+main (void)
+{
+  double x = tests_infinity_d ();
+  if (x == 0.0)
+    __builtin_abort ();
+  return 0;
+}
-- 
2.23.0