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-rw-r--r--recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99436.patch209
1 files changed, 209 insertions, 0 deletions
diff --git a/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99436.patch b/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99436.patch
new file mode 100644
index 0000000000..deb749efcb
--- /dev/null
+++ b/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99436.patch
@@ -0,0 +1,209 @@
12010-11-24 Maxim Kuvyrkov <maxim@codesourcery.com>
2
3 gcc/
4 * combine.c (subst, combine_simlify_rtx): Add new argument, use it
5 to track processing of conditionals. Update all callers.
6 (try_combine, simplify_if_then_else): Update.
7
8=== modified file 'gcc/combine.c'
9--- old/gcc/combine.c 2010-11-04 12:39:28 +0000
10+++ new/gcc/combine.c 2010-11-25 11:11:45 +0000
11@@ -392,8 +392,8 @@
12 static void undo_all (void);
13 static void undo_commit (void);
14 static rtx *find_split_point (rtx *, rtx);
15-static rtx subst (rtx, rtx, rtx, int, int);
16-static rtx combine_simplify_rtx (rtx, enum machine_mode, int);
17+static rtx subst (rtx, rtx, rtx, int, int, int);
18+static rtx combine_simplify_rtx (rtx, enum machine_mode, int, int);
19 static rtx simplify_if_then_else (rtx);
20 static rtx simplify_set (rtx);
21 static rtx simplify_logical (rtx);
22@@ -2944,12 +2944,12 @@
23 if (i1)
24 {
25 subst_low_luid = DF_INSN_LUID (i1);
26- i1src = subst (i1src, pc_rtx, pc_rtx, 0, 0);
27+ i1src = subst (i1src, pc_rtx, pc_rtx, 0, 0, 0);
28 }
29 else
30 {
31 subst_low_luid = DF_INSN_LUID (i2);
32- i2src = subst (i2src, pc_rtx, pc_rtx, 0, 0);
33+ i2src = subst (i2src, pc_rtx, pc_rtx, 0, 0, 0);
34 }
35 }
36
37@@ -2960,7 +2960,7 @@
38 to avoid self-referential rtl. */
39
40 subst_low_luid = DF_INSN_LUID (i2);
41- newpat = subst (PATTERN (i3), i2dest, i2src, 0,
42+ newpat = subst (PATTERN (i3), i2dest, i2src, 0, 0,
43 ! i1_feeds_i3 && i1dest_in_i1src);
44 substed_i2 = 1;
45
46@@ -2991,7 +2991,7 @@
47
48 n_occurrences = 0;
49 subst_low_luid = DF_INSN_LUID (i1);
50- newpat = subst (newpat, i1dest, i1src, 0, 0);
51+ newpat = subst (newpat, i1dest, i1src, 0, 0, 0);
52 substed_i1 = 1;
53 }
54
55@@ -3053,7 +3053,7 @@
56 else
57 /* See comment where i2pat is assigned. */
58 XVECEXP (newpat, 0, --total_sets)
59- = subst (i2pat, i1dest, i1src, 0, 0);
60+ = subst (i2pat, i1dest, i1src, 0, 0, 0);
61 }
62 }
63
64@@ -4605,11 +4605,13 @@
65
66 IN_DEST is nonzero if we are processing the SET_DEST of a SET.
67
68+ IN_COND is nonzero if we are on top level of the condition.
69+
70 UNIQUE_COPY is nonzero if each substitution must be unique. We do this
71 by copying if `n_occurrences' is nonzero. */
72
73 static rtx
74-subst (rtx x, rtx from, rtx to, int in_dest, int unique_copy)
75+subst (rtx x, rtx from, rtx to, int in_dest, int in_cond, int unique_copy)
76 {
77 enum rtx_code code = GET_CODE (x);
78 enum machine_mode op0_mode = VOIDmode;
79@@ -4670,7 +4672,7 @@
80 && GET_CODE (XVECEXP (x, 0, 0)) == SET
81 && GET_CODE (SET_SRC (XVECEXP (x, 0, 0))) == ASM_OPERANDS)
82 {
83- new_rtx = subst (XVECEXP (x, 0, 0), from, to, 0, unique_copy);
84+ new_rtx = subst (XVECEXP (x, 0, 0), from, to, 0, 0, unique_copy);
85
86 /* If this substitution failed, this whole thing fails. */
87 if (GET_CODE (new_rtx) == CLOBBER
88@@ -4687,7 +4689,7 @@
89 && GET_CODE (dest) != CC0
90 && GET_CODE (dest) != PC)
91 {
92- new_rtx = subst (dest, from, to, 0, unique_copy);
93+ new_rtx = subst (dest, from, to, 0, 0, unique_copy);
94
95 /* If this substitution failed, this whole thing fails. */
96 if (GET_CODE (new_rtx) == CLOBBER
97@@ -4733,8 +4735,8 @@
98 }
99 else
100 {
101- new_rtx = subst (XVECEXP (x, i, j), from, to, 0,
102- unique_copy);
103+ new_rtx = subst (XVECEXP (x, i, j), from, to, 0, 0,
104+ unique_copy);
105
106 /* If this substitution failed, this whole thing
107 fails. */
108@@ -4811,7 +4813,9 @@
109 && (code == SUBREG || code == STRICT_LOW_PART
110 || code == ZERO_EXTRACT))
111 || code == SET)
112- && i == 0), unique_copy);
113+ && i == 0),
114+ code == IF_THEN_ELSE && i == 0,
115+ unique_copy);
116
117 /* If we found that we will have to reject this combination,
118 indicate that by returning the CLOBBER ourselves, rather than
119@@ -4868,7 +4872,7 @@
120 /* If X is sufficiently simple, don't bother trying to do anything
121 with it. */
122 if (code != CONST_INT && code != REG && code != CLOBBER)
123- x = combine_simplify_rtx (x, op0_mode, in_dest);
124+ x = combine_simplify_rtx (x, op0_mode, in_dest, in_cond);
125
126 if (GET_CODE (x) == code)
127 break;
128@@ -4888,10 +4892,12 @@
129 expression.
130
131 OP0_MODE is the original mode of XEXP (x, 0). IN_DEST is nonzero
132- if we are inside a SET_DEST. */
133+ if we are inside a SET_DEST. IN_COND is nonzero if we are on the top level
134+ of a condition. */
135
136 static rtx
137-combine_simplify_rtx (rtx x, enum machine_mode op0_mode, int in_dest)
138+combine_simplify_rtx (rtx x, enum machine_mode op0_mode, int in_dest,
139+ int in_cond)
140 {
141 enum rtx_code code = GET_CODE (x);
142 enum machine_mode mode = GET_MODE (x);
143@@ -4946,8 +4952,8 @@
144 false arms to store-flag values. Be careful to use copy_rtx
145 here since true_rtx or false_rtx might share RTL with x as a
146 result of the if_then_else_cond call above. */
147- true_rtx = subst (copy_rtx (true_rtx), pc_rtx, pc_rtx, 0, 0);
148- false_rtx = subst (copy_rtx (false_rtx), pc_rtx, pc_rtx, 0, 0);
149+ true_rtx = subst (copy_rtx (true_rtx), pc_rtx, pc_rtx, 0, 0, 0);
150+ false_rtx = subst (copy_rtx (false_rtx), pc_rtx, pc_rtx, 0, 0, 0);
151
152 /* If true_rtx and false_rtx are not general_operands, an if_then_else
153 is unlikely to be simpler. */
154@@ -5291,7 +5297,7 @@
155 {
156 /* Try to simplify the expression further. */
157 rtx tor = simplify_gen_binary (IOR, mode, XEXP (x, 0), XEXP (x, 1));
158- temp = combine_simplify_rtx (tor, mode, in_dest);
159+ temp = combine_simplify_rtx (tor, mode, in_dest, 0);
160
161 /* If we could, great. If not, do not go ahead with the IOR
162 replacement, since PLUS appears in many special purpose
163@@ -5384,7 +5390,16 @@
164 ZERO_EXTRACT is indeed appropriate, it will be placed back by
165 the call to make_compound_operation in the SET case. */
166
167- if (STORE_FLAG_VALUE == 1
168+ if (in_cond)
169+ /* Don't apply below optimizations if the caller would
170+ prefer a comparison rather than a value.
171+ E.g., for the condition in an IF_THEN_ELSE most targets need
172+ an explicit comparison. */
173+ {
174+ ;
175+ }
176+
177+ else if (STORE_FLAG_VALUE == 1
178 && new_code == NE && GET_MODE_CLASS (mode) == MODE_INT
179 && op1 == const0_rtx
180 && mode == GET_MODE (op0)
181@@ -5628,11 +5643,11 @@
182 if (reg_mentioned_p (from, true_rtx))
183 true_rtx = subst (known_cond (copy_rtx (true_rtx), true_code,
184 from, true_val),
185- pc_rtx, pc_rtx, 0, 0);
186+ pc_rtx, pc_rtx, 0, 0, 0);
187 if (reg_mentioned_p (from, false_rtx))
188 false_rtx = subst (known_cond (copy_rtx (false_rtx), false_code,
189 from, false_val),
190- pc_rtx, pc_rtx, 0, 0);
191+ pc_rtx, pc_rtx, 0, 0, 0);
192
193 SUBST (XEXP (x, 1), swapped ? false_rtx : true_rtx);
194 SUBST (XEXP (x, 2), swapped ? true_rtx : false_rtx);
195@@ -5849,11 +5864,11 @@
196 {
197 temp = subst (simplify_gen_relational (true_code, m, VOIDmode,
198 cond_op0, cond_op1),
199- pc_rtx, pc_rtx, 0, 0);
200+ pc_rtx, pc_rtx, 0, 0, 0);
201 temp = simplify_gen_binary (MULT, m, temp,
202 simplify_gen_binary (MULT, m, c1,
203 const_true_rtx));
204- temp = subst (temp, pc_rtx, pc_rtx, 0, 0);
205+ temp = subst (temp, pc_rtx, pc_rtx, 0, 0, 0);
206 temp = simplify_gen_binary (op, m, gen_lowpart (m, z), temp);
207
208 if (extend_op != UNKNOWN)
209
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