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-rw-r--r--recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99452.patch201
1 files changed, 201 insertions, 0 deletions
diff --git a/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99452.patch b/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99452.patch
new file mode 100644
index 0000000000..6cfc01feff
--- /dev/null
+++ b/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99452.patch
@@ -0,0 +1,201 @@
12010-12-14 Sandra Loosemore <sandra@codesourcery.com>
2
3 Backport from mainline:
4
5 2010-12-14 Jakub Jelinek <jakub@redhat.com>
6
7 PR tree-optimization/46909
8
9 gcc/
10 * tree-ssa-ccp.c (and_var_with_comparison_1): Save partial
11 result even in the is_and case, if both partial results
12 are the same, return it.
13 (or_var_with_comparison_1): Use is_or predicate instead of
14 innercode == TRUTH_OR_EXPR test. Save partial result
15 even in the is_or case, if both partial results are the
16 same, return it. In the !is_or case when both partial
17 results are the same, return the partial result instead
18 of boolean_true_node.
19
20 gcc/testsuite/
21 * gcc.c-torture/execute/pr46909-1.c: New test.
22 * gcc.c-torture/execute/pr46909-2.c: New test.
23 * gcc.dg/pr46909.c: New test.
24
25=== added file 'gcc/testsuite/gcc.c-torture/execute/pr46909-1.c'
26--- old/gcc/testsuite/gcc.c-torture/execute/pr46909-1.c 1970-01-01 00:00:00 +0000
27+++ new/gcc/testsuite/gcc.c-torture/execute/pr46909-1.c 2011-01-05 11:27:00 +0000
28@@ -0,0 +1,22 @@
29+/* PR tree-optimization/46909 */
30+
31+extern void abort ();
32+
33+int
34+__attribute__ ((__noinline__))
35+foo (unsigned int x)
36+{
37+ if (! (x == 4 || x == 6) || (x == 2 || x == 6))
38+ return 1;
39+ return -1;
40+}
41+
42+int
43+main ()
44+{
45+ int i;
46+ for (i = -10; i < 10; i++)
47+ if (foo (i) != 1 - 2 * (i == 4))
48+ abort ();
49+ return 0;
50+}
51
52=== added file 'gcc/testsuite/gcc.c-torture/execute/pr46909-2.c'
53--- old/gcc/testsuite/gcc.c-torture/execute/pr46909-2.c 1970-01-01 00:00:00 +0000
54+++ new/gcc/testsuite/gcc.c-torture/execute/pr46909-2.c 2011-01-05 11:27:00 +0000
55@@ -0,0 +1,22 @@
56+/* PR tree-optimization/46909 */
57+
58+extern void abort (void);
59+
60+int
61+__attribute__((noinline))
62+foo (int x)
63+{
64+ if ((x != 0 && x != 13) || x == 5 || x == 20)
65+ return 1;
66+ return -1;
67+}
68+
69+int
70+main (void)
71+{
72+ int i;
73+ for (i = -10; i < 30; i++)
74+ if (foo (i) != 1 - 2 * (i == 0) - 2 * (i == 13))
75+ abort ();
76+ return 0;
77+}
78
79=== added file 'gcc/testsuite/gcc.dg/pr46909.c'
80--- old/gcc/testsuite/gcc.dg/pr46909.c 1970-01-01 00:00:00 +0000
81+++ new/gcc/testsuite/gcc.dg/pr46909.c 2011-01-05 11:27:00 +0000
82@@ -0,0 +1,17 @@
83+/* PR tree-optimization/46909 */
84+/* { dg-do compile } */
85+/* { dg-options "-O2 -fdump-tree-ifcombine" } */
86+
87+extern void abort ();
88+
89+int
90+__attribute__ ((__noinline__))
91+foo (unsigned int x)
92+{
93+ if (! (x == 4 || x == 6) || (x == 2 || x == 6))
94+ return 1;
95+ return -1;
96+}
97+
98+/* { dg-final { scan-tree-dump "optimizing two comparisons to x_\[0-9\]+\\(D\\) != 4" "ifcombine" } } */
99+/* { dg-final { cleanup-tree-dump "ifcombine" } } */
100
101=== modified file 'gcc/tree-ssa-ccp.c'
102--- old/gcc/tree-ssa-ccp.c 2010-09-16 09:15:46 +0000
103+++ new/gcc/tree-ssa-ccp.c 2011-01-05 11:27:00 +0000
104@@ -3508,14 +3508,11 @@
105 /* Handle the OR case, where we are redistributing:
106 (inner1 OR inner2) AND (op2a code2 op2b)
107 => (t OR (inner2 AND (op2a code2 op2b))) */
108- else
109- {
110- if (integer_onep (t))
111- return boolean_true_node;
112- else
113- /* Save partial result for later. */
114- partial = t;
115- }
116+ else if (integer_onep (t))
117+ return boolean_true_node;
118+
119+ /* Save partial result for later. */
120+ partial = t;
121 }
122
123 /* Compute the second partial result, (inner2 AND (op2a code op2b)) */
124@@ -3536,6 +3533,10 @@
125 return inner1;
126 else if (integer_zerop (t))
127 return boolean_false_node;
128+ /* If both are the same, we can apply the identity
129+ (x AND x) == x. */
130+ else if (partial && same_bool_result_p (t, partial))
131+ return t;
132 }
133
134 /* Handle the OR case. where we are redistributing:
135@@ -3945,7 +3946,7 @@
136 => (t OR inner2)
137 If the partial result t is a constant, we win. Otherwise
138 continue on to try reassociating with the other inner test. */
139- if (innercode == TRUTH_OR_EXPR)
140+ if (is_or)
141 {
142 if (integer_onep (t))
143 return boolean_true_node;
144@@ -3956,14 +3957,11 @@
145 /* Handle the AND case, where we are redistributing:
146 (inner1 AND inner2) OR (op2a code2 op2b)
147 => (t AND (inner2 OR (op2a code op2b))) */
148- else
149- {
150- if (integer_zerop (t))
151- return boolean_false_node;
152- else
153- /* Save partial result for later. */
154- partial = t;
155- }
156+ else if (integer_zerop (t))
157+ return boolean_false_node;
158+
159+ /* Save partial result for later. */
160+ partial = t;
161 }
162
163 /* Compute the second partial result, (inner2 OR (op2a code op2b)) */
164@@ -3977,13 +3975,18 @@
165 {
166 /* Handle the OR case, where we are reassociating:
167 (inner1 OR inner2) OR (op2a code2 op2b)
168- => (inner1 OR t) */
169- if (innercode == TRUTH_OR_EXPR)
170+ => (inner1 OR t)
171+ => (t OR partial) */
172+ if (is_or)
173 {
174 if (integer_zerop (t))
175 return inner1;
176 else if (integer_onep (t))
177 return boolean_true_node;
178+ /* If both are the same, we can apply the identity
179+ (x OR x) == x. */
180+ else if (partial && same_bool_result_p (t, partial))
181+ return t;
182 }
183
184 /* Handle the AND case, where we are redistributing:
185@@ -4000,13 +4003,13 @@
186 operand to the redistributed AND expression. The
187 interesting case is when at least one is true.
188 Or, if both are the same, we can apply the identity
189- (x AND x) == true. */
190+ (x AND x) == x. */
191 if (integer_onep (partial))
192 return t;
193 else if (integer_onep (t))
194 return partial;
195 else if (same_bool_result_p (t, partial))
196- return boolean_true_node;
197+ return t;
198 }
199 }
200 }
201
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