re PR target/12898 (Tru64 UNIX bootstrap failure: ICE in gen_reg_rtx, at emit-rtl.c:819)

        PR target/12898
        * config/alpha/alpha.c (alpha_emit_set_const_1): If
        no_new_pseudos, use gen_rtx_SET directly for SImode constants
        which need multiple instructions to emit.

        * testsuite/gcc.c-torture/compile/20040121-1.c: New test.

From-SVN: r76283

4 files changed, 60 insertions, 1 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5eaac36..ac0537f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2004-01-21  Falk Hueffner  <falk@debian.org>
+
+	PR target/12898
+	* config/alpha/alpha.c (alpha_emit_set_const_1): If
+	no_new_pseudos, use gen_rtx_SET directly for SImode constants
+	which need multiple instructions to emit.
+
 2004-01-21  Inaoka Kazuhiro  <inaoka.kazuhiro@renesas.com>
 
 	* config/m32r/m32r.h (CPP_SPEC): Define.
diff --git a/gcc/config/alpha/alpha.c b/gcc/config/alpha/alpha.c
index f6485a0..581d344 100644
--- a/gcc/config/alpha/alpha.c
+++ b/gcc/config/alpha/alpha.c
@@ -2503,7 +2503,14 @@ alpha_emit_set_const_1 (rtx target, enum machine_mode mode,
 	}
       else if (n >= 2 + (extra != 0))
 	{
-	  temp = copy_to_suggested_reg (GEN_INT (high << 16), subtarget, mode);
+	  if (no_new_pseudos)
+	    {
+	      emit_insn (gen_rtx_SET (VOIDmode, target, GEN_INT (high << 16)));
+	      temp = target;
+	    }
+	  else
+	    temp = copy_to_suggested_reg (GEN_INT (high << 16),
+					  subtarget, mode);
 
 	  /* As of 2002-02-23, addsi3 is only available when not optimizing.
 	     This means that if we go through expand_binop, we'll try to
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9b022b8..35f7953 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2004-01-21  Falk Hueffner  <falk@debian.org>
+
+	* gcc.c-torture/compile/20040121-1.c: New test.
+
 2004-01-21  Zack Weinberg  <zack@codesourcery.com>
 
 	* gcc.dg/noncompile/20020213-1.c: Add another dg-warning line.
diff --git a/gcc/testsuite/gcc.c-torture/compile/20040121-1.c b/gcc/testsuite/gcc.c-torture/compile/20040121-1.c
new file mode 100644
index 0000000..2039472
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/20040121-1.c
@@ -0,0 +1,41 @@
+/* PR target/12898
+   0x8000 needs multiple instructions to be emitted on Alpha; the
+   fluff around it causes it to be emitted in a no_new_pseudos
+   context, which triggered a problem in alpha.c.  */
+
+void f (const char *, ...);
+int g (void);
+void *p (void);
+
+int isymBase, ilineBase, sym_hdr, want_line, proc_desc;
+char *lines;
+
+void print_file_desc (int *fdp)
+{
+  char *str_base = p ();
+  int symi, pdi = g ();
+
+  for (symi = 0; isymBase;)
+    {
+      int proc_ptr = proc_desc + pdi;
+      f("1", isymBase, proc_ptr + *fdp, str_base);
+      if (want_line && *fdp)
+	{
+	  int delta;
+	  long cur_line = proc_ptr;
+	  char *line_ptr = lines + proc_ptr;
+	  char *line_end = p ();
+
+	  f("2", sym_hdr);
+	  while (line_ptr < line_end)
+	    {
+	      delta = *line_ptr;
+	      if (delta)
+		line_ptr++;
+	      else
+		delta = line_ptr[1] ^ 0x8000;
+	      f("3", cur_line, delta);
+	    }
+	}
+    }
+}