The attached patch fixes PR/78748. Bootstrapped and regression
tested on s390 and s390x.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78748
Ciao
Dominik ^_^ ^_^
--
Dominik Vogt
IBM Germany
gcc/ChangeLog-pr78748
PR target/78748
* config/s390/s390.md ("*andc_split_<mode>"): Allow memory destination
only if it coincides with operand 2.
gcc/testsuite/ChangeLog-pr78748
PR target/78748
* gcc.c-torture/compile/pr78748.c: New test.
>From b48da97e3b2f5b0b49543ed35d8c667a607067cf Mon Sep 17 00:00:00 2001
From: Dominik Vogt <v...@linux.vnet.ibm.com>
Date: Mon, 12 Dec 2016 10:35:21 +0100
Subject: [PATCH] PR target/78748: S/390: Fix ICE with ANDC splitter.
---
gcc/config/s390/s390.md | 6 +++++-
gcc/testsuite/gcc.c-torture/compile/pr78748.c | 16 ++++++++++++++++
2 files changed, 21 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gcc.c-torture/compile/pr78748.c
diff --git a/gcc/config/s390/s390.md b/gcc/config/s390/s390.md
index 4f2effd..9d8e6b6 100644
--- a/gcc/config/s390/s390.md
+++ b/gcc/config/s390/s390.md
@@ -7420,7 +7420,11 @@
(and:GPR (not:GPR (match_operand:GPR 1 "nonimmediate_operand" ""))
(match_operand:GPR 2 "general_operand" "")))
(clobber (reg:CC CC_REGNUM))]
- "! reload_completed && s390_logical_operator_ok_p (operands)"
+ "! reload_completed
+ && (GET_CODE (operands[0]) != MEM
+ /* Ensure that s390_logical_operator_ok_p will succeed even
+ on the split xor if (b & a) is stored into a pseudo. */
+ || rtx_equal_p (operands[0], operands[2]))"
"#"
"&& 1"
[
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr78748.c
b/gcc/testsuite/gcc.c-torture/compile/pr78748.c
new file mode 100644
index 0000000..d24a334
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr78748.c
@@ -0,0 +1,16 @@
+/* PR target/78748 */
+/* { dg-options "-march=zEC12" { target { s390*-*-* } } } */
+
+void
+foo (int *p, int *q)
+{
+ *q = *p & ~*q;
+}
+
+#if 0 /*!!!*/
+void
+bar (int *p, int *q)
+{
+ *q = ~*p & *q;
+}
+#endif
--
2.3.0
