From: Ian Lance Taylor <iant@google.com>
Date: Wed, 30 Dec 2009 19:50:24 +0000 (+0000)
Subject: re PR middle-end/42099 (Error in 64-bit division for 32-bit target)
X-Git-Tag: releases/gcc-4.3.5~241
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=83d6270bcaf6d9b5b230a199499a662ed0b254aa;p=thirdparty%2Fgcc.git

re PR middle-end/42099 (Error in 64-bit division for 32-bit target)

gcc/:
	PR middle-end/42099
	* expmed.c (expand_divmod): Don't shift HOST_WIDE_INT value more
	than HOST_BITS_PER_WIDE_INT.
gcc/testsuite/:
	PR middle-end/42099
	* gcc.c-torture/execute/20091229-1.c: New test.

From-SVN: r155525
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 298372b8bc18..4d020f8b4525 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2009-12-30  Ian Lance Taylor  <iant@google.com>
+
+	PR middle-end/42099
+	* expmed.c (expand_divmod): Don't shift HOST_WIDE_INT value more
+	than HOST_BITS_PER_WIDE_INT.
+
 2009-12-30  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/42549
diff --git a/gcc/expmed.c b/gcc/expmed.c
index dc61de73ee29..c1233aacb5ab 100644
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -4136,7 +4136,8 @@ expand_divmod (int rem_flag, enum tree_code code, enum machine_mode mode,
 		else if (d == -1)
 		  quotient = expand_unop (compute_mode, neg_optab, op0,
 					  tquotient, 0);
-		else if (abs_d == (unsigned HOST_WIDE_INT) 1 << (size - 1))
+		else if (HOST_BITS_PER_WIDE_INT >= size
+			 && abs_d == (unsigned HOST_WIDE_INT) 1 << (size - 1))
 		  {
 		    /* This case is not handled correctly below.  */
 		    quotient = emit_store_flag (tquotient, EQ, op0, op1,
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index f4182a303be4..71954430f73b 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2009-12-30  Ian Lance Taylor  <iant@google.com>
+
+	PR middle-end/42099
+	* gcc.c-torture/execute/20091229-1.c: New test.
+
 2009-12-30  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/42549
diff --git a/gcc/testsuite/gcc.c-torture/execute/20091229-1.c b/gcc/testsuite/gcc.c-torture/execute/20091229-1.c
new file mode 100644
index 000000000000..08d952f1b3ae
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/20091229-1.c
@@ -0,0 +1,2 @@
+long long foo(long long v) { return v / -0x080000000LL; }
+void main() { if (foo(0x080000000LL) != -1) abort(); exit (0); }