From: Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Date: Tue, 10 Apr 2018 13:05:24 +0000 (+0000)
Subject: [AArch64] PR target/84748: Mark *compare_cstore<mode>_insn as clobbering CC reg
X-Git-Tag: releases/gcc-6.5.0~392
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=68d980fc30076a1bd9a4e631fd226c020a95c142;p=thirdparty%2Fgcc.git

[AArch64] PR target/84748: Mark *compare_cstore<mode>_insn as clobbering CC reg

	Backport from mainline
	2018-03-08  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

	PR target/84748
	* config/aarch64/aarch64.md (*compare_cstore<mode>_insn): Mark pattern
	as clobbering CC_REGNUM.

	* gcc.c-torture/execute/pr84748.c: New test.

From-SVN: r259271
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2186cef8198e..4b5ee7cd8f4b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2018-04-10  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	Backport from mainline
+	2018-03-08  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	PR target/84748
+	* config/aarch64/aarch64.md (*compare_cstore<mode>_insn): Mark pattern
+	as clobbering CC_REGNUM.
+
 2018-04-06  Eric Botcazou  <ebotcazou@adacore.com>
 
 	PR target/85196
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index 2c9f48cb79e5..d0517f9cd02a 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -3081,7 +3081,8 @@
 (define_insn_and_split "*compare_cstore<mode>_insn"
   [(set (match_operand:GPI 0 "register_operand" "=r")
 	 (EQL:GPI (match_operand:GPI 1 "register_operand" "r")
-		  (match_operand:GPI 2 "aarch64_imm24" "n")))]
+		  (match_operand:GPI 2 "aarch64_imm24" "n")))
+   (clobber (reg:CC CC_REGNUM))]
   "!aarch64_move_imm (INTVAL (operands[2]), <MODE>mode)
    && !aarch64_plus_operand (operands[2], <MODE>mode)
    && !reload_completed"
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 4101bf9e3b07..955b32d233ba 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2018-04-10  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	Backport from mainline
+	2018-03-08  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	PR target/84748
+	* gcc.c-torture/execute/pr84748.c: New test.
+
 2018-04-06  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* g++.dg/opt/pr85196.C: New test.
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr84748.c b/gcc/testsuite/gcc.c-torture/execute/pr84748.c
new file mode 100644
index 000000000000..9572ab285c66
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr84748.c
@@ -0,0 +1,34 @@
+/* { dg-require-effective-target int128 } */
+
+typedef unsigned __int128 u128;
+
+int a, c, d;
+u128 b;
+
+unsigned long long g0, g1;
+
+void
+store (unsigned long long a0, unsigned long long a1)
+{
+  g0 = a0;
+  g1 = a1;
+}
+
+void
+foo (void)
+{
+  b += a;
+  c = d != 84347;
+  b /= c;
+  u128 x = b;
+  store (x >> 0, x >> 64);
+}
+
+int
+main (void)
+{
+  foo ();
+  if (g0 != 0 || g1 != 0)
+    __builtin_abort ();
+  return 0;
+}