From: James E Wilson <wilson@specifixinc.com>
Date: Fri, 9 Jul 2004 23:10:26 +0000 (+0000)
Subject: Fix for IA-64 union/long double ICE.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5806d4fd849871d77fdc9b5f6a1ef05d42039a52;p=gcc.git

Fix for IA-64 union/long double ICE.

PR target/16364
* config/ia64/ia64.c (ia64_function_arg): For a single element HFA,
do return a parallel if hfa_mode == XFmode and mode == TImode.
* gcc.c-torture/compile/20040709-1.c: New.

From-SVN: r84416
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0bb7353eeab..3c59958f24d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2004-07-09  James E Wilson  <wilson@specifixinc.com>
+
+	PR target/16364
+	* config/ia64/ia64.c (ia64_function_arg): For a single element HFA,
+	do return a parallel if hfa_mode == XFmode and mode == TImode.
+
 2004-07-09 Jan Beulich <jbeulich@novell.com>
 
 	* builtin-types.def (BT_UINT): Rename from BT_UNSIGNED.
diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c
index 117f965e29e..fdebfba19cd 100644
--- a/gcc/config/ia64/ia64.c
+++ b/gcc/config/ia64/ia64.c
@@ -3746,8 +3746,12 @@ ia64_function_arg (CUMULATIVE_ARGS *cum, enum machine_mode mode, tree type,
 	}
 
       /* If we ended up using just one location, just return that one loc, but
-	 change the mode back to the argument mode.  */
-      if (i == 1)
+	 change the mode back to the argument mode.  However, we can't do this
+	 when hfa_mode is XFmode and mode is TImode.  In that case, we would
+	 return a TImode reference to an FP reg, but FP regs can't hold TImode.
+	 We need the PARALLEL to make this work.  This can happen for a union
+	 containing a single __float80 member.  */
+      if (i == 1 && ! (hfa_mode == XFmode && mode == TImode))
 	return gen_rtx_REG (mode, REGNO (XEXP (loc[0], 0)));
       else
 	return gen_rtx_PARALLEL (mode, gen_rtvec_v (i, loc));
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 89d0e6d3a31..d82a14fd844 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2004-07-09  James E Wilson  <wilson@specifixinc.com>
+
+	PR target/16364
+	* gcc.c-torture/compile/20040709-1.c: New.
+
 2004-07-09  Tobias Schlueter  <tobias.schlueter@physik.uni-muenchen.de>
 	
 	PR fortran/14077
diff --git a/gcc/testsuite/gcc.c-torture/compile/20040709-1.c b/gcc/testsuite/gcc.c-torture/compile/20040709-1.c
new file mode 100644
index 00000000000..c8c9cc357fb
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/20040709-1.c
@@ -0,0 +1,10 @@
+/* PR target/16364 */
+union foo {
+  long double ld;
+} bar;
+
+double
+sub (union foo baz)
+{
+  return baz.ld / 2;
+}