From: Uros Bizjak <ubizjak@gmail.com>
Date: Sun, 7 Apr 2019 19:19:08 +0000 (+0200)
Subject: re PR target/89945 (ICE in gen_lowpart_general, at rtlhooks.c:63)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=45acde2fe01cea0e2e11dda9d336133c5b526f6d;p=gcc.git

re PR target/89945 (ICE in gen_lowpart_general, at rtlhooks.c:63)

	PR target/89945
	* config/i386/i386.md (anddi_1 to andsi_1_zext splitter):
	Avoid calling gen_lowpart with SYMBOL_REF and LABEL_REF operand.

testsuite/ChangeLog:

	PR target/89945
	* gcc.target/i386/pr89945.c: New test.

From-SVN: r270190
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f4075784288..778c70af280 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-04-07  Uroš Bizjak  <ubizjak@gmail.com>
+
+	PR target/89945
+	* config/i386/i386.md (anddi_1 to andsi_1_zext splitter):
+	Avoid calling gen_lowpart with SYMBOL_REF and LABEL_REF operand.
+
 2019-04-05  Joern Rennecke  <joern.rennecke@embecosm.com>
 
 	* sched-deps.c (sched_macro_fuse_insns): Check return value of
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 46277f158bb..0fe778fda92 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -8609,7 +8609,16 @@
   [(parallel [(set (match_dup 0)
 		   (zero_extend:DI (and:SI (match_dup 1) (match_dup 2))))
 	      (clobber (reg:CC FLAGS_REG))])]
-  "operands[2] = gen_lowpart (SImode, operands[2]);")
+{
+  if (GET_CODE (operands[2]) == SYMBOL_REF
+      || GET_CODE (operands[2]) == LABEL_REF)
+    {
+      operands[2] = shallow_copy_rtx (operands[2]);
+      PUT_MODE (operands[2], SImode);
+    }
+  else
+    operands[2] = gen_lowpart (SImode, operands[2]);
+})
 
 ;; See comment for addsi_1_zext why we do use nonimmediate_operand
 (define_insn "*andsi_1_zext"
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 4208625d09e..50ac61c649d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-04-07  Uroš Bizjak  <ubizjak@gmail.com>
+
+	PR target/89945
+	* gcc.target/i386/pr89945.c: New test.
+
 2019-04-06  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR fortran/87352
diff --git a/gcc/testsuite/gcc.target/i386/pr89945.c b/gcc/testsuite/gcc.target/i386/pr89945.c
new file mode 100644
index 00000000000..39e864a9d65
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr89945.c
@@ -0,0 +1,21 @@
+/* PR target/89945 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+void
+foo ()
+{
+  void *g[] = {&&a, &&b};
+
+  for (unsigned c = 0x1F;; c >>= 1)
+    {
+      unsigned d = (long)"a";
+      long e = 8;
+
+      while (e)
+        {
+          a: goto *g[c&d];
+          b: e--;
+        }
+    }
+}