From: Vladimir Makarov <vmakarov@redhat.com>
Date: Thu, 25 Jul 2019 18:36:52 +0000 (+0000)
Subject: re PR rtl-optimization/91223 (ICE: in curr_insn_transform, at lra-constraints.c:4459)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9f41de41eaf6d30d2b492c1f13d01dd8e90bba81;p=gcc.git

re PR rtl-optimization/91223 (ICE: in curr_insn_transform, at lra-constraints.c:4459)

2019-07-25  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/91223
	* lra-constraints.c (process_alt_operands): Fail for unsuccessful
	matching with INOUT operand.

2019-07-25  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/91223
	* gcc.target/i386/pr91223.c: New test.

From-SVN: r273810
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 336e9eef2c3..42beda4e643 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-07-25  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/91223
+	* lra-constraints.c (process_alt_operands): Fail for unsuccessful
+	matching with INOUT operand.
+
 2019-07-25  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* stmt.c (expand_case): Try to narrow the index type if it's larger
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
index 55d8d133d39..bd9f85d33cc 100644
--- a/gcc/lra-constraints.c
+++ b/gcc/lra-constraints.c
@@ -2171,6 +2171,14 @@ process_alt_operands (int only_alternative)
 		      }
 		    else
 		      {
+			/* If the operands do not match and one
+			   operand is INOUT, we can not match them.
+			   Try other possibilities, e.g. other
+			   alternatives or commutative operand
+			   exchange.  */
+			if (curr_static_id->operand[nop].type == OP_INOUT
+			    || curr_static_id->operand[m].type == OP_INOUT)
+			  break;
 			/* Operands don't match.  If the operands are
 			   different user defined explicit hard
 			   registers, then we cannot make them match
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 6fc49316c8a..0ff528b87b3 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-07-25  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/91223
+	* gcc.target/i386/pr91223.c: New test.
+
 2019-07-25  Iain Sandoe  <iain@sandoe.co.uk>
 
 	PR gcov-profile/91087
diff --git a/gcc/testsuite/gcc.target/i386/pr91223.c b/gcc/testsuite/gcc.target/i386/pr91223.c
new file mode 100644
index 00000000000..1b9e85b2308
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr91223.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-Og -fno-tree-fre" } */
+int a;
+void fn2(short, short);
+
+void fn1(void) {
+  short b[8];
+  b[0] |= a & 3;
+  b[1] = a;
+  fn2(b[0], b[1]);
+}