From 1d5fa6b42508d546fe875bb6809e645523f01e70 Mon Sep 17 00:00:00 2001
From: "J\"orn Rennecke" <joern.rennecke@superh.com>
Date: Tue, 23 Jul 2002 19:57:42 +0000
Subject: [PATCH] simplify-rtx.x (simplify_subreg): When constructing a
CONST_VECTOR from individual subregs...
* simplify-rtx.x (simplify_subreg): When constructing a CONST_VECTOR
from individual subregs, check that each subreg has been generated
sucessfully.
From-SVN: r55686
---
gcc/ChangeLog | 6 ++++++
gcc/simplify-rtx.c | 9 ++++++++-
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 90bf680648c9..36d45caec217 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+Tue Jul 23 20:56:03 2002 J"orn Rennecke <joern.rennecke@superh.com>
+
+ * simplify-rtx.x (simplify_subreg): When constructing a CONST_VECTOR
+ from individual subregs, check that each subreg has been generated
+ sucessfully.
+
2002-07-23 Neil Booth <neil@daikokuya.co.uk>
* genautomata.c (VLA_HWINT_SHORTEN, VLA_HWINT_LAST): Remove.
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index c69084f70277..d07de68d223f 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -2367,10 +2367,17 @@ simplify_subreg (outermode, op, innermode, byte)
int subsize = GET_MODE_UNIT_SIZE (outermode);
int i, elts = GET_MODE_NUNITS (outermode);
rtvec v = rtvec_alloc (elts);
+ rtx elt;
for (i = 0; i < elts; i++, byte += subsize)
{
- RTVEC_ELT (v, i) = simplify_subreg (submode, op, innermode, byte);
+ /* This might fail, e.g. if taking a subreg from a SYMBOL_REF. */
+ /* ??? It would be nice if we could actually make such subregs
+ on targets that allow such relocations. */
+ elt = simplify_subreg (submode, op, innermode, byte);
+ if (! elt)
+ return NULL_RTX;
+ RTVEC_ELT (v, i) = elt;
}
return gen_rtx_CONST_VECTOR (outermode, v);
}
--
GitLab