/usr/src/gcc-4.6/debian/patches/pr49696.diff is in gcc-4.6-source 4.6.4-6ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | 2011-10-02 Richard Sandiford <rdsandiford@googlemail.com>
PR target/49696
* config/mips/sync.md (sync_<optab>_12): Allow zero operands.
(sync_old_<optab>_12, sync_new_<optab>_12, sync_nand_12): Likewise.
(sync_old_nand_12, sync_new_nand_12, test_and_set_12): Likewise.
--- a/src/gcc/config/mips/sync.md
+++ b/src/gcc/config/mips/sync.md
@@ -136,7 +136,7 @@
[(match_operand:SI 1 "register_operand" "d")
(match_operand:SI 2 "register_operand" "d")
(atomic_hiqi_op:SI (match_dup 0)
- (match_operand:SI 3 "register_operand" "dJ"))]
+ (match_operand:SI 3 "reg_or_0_operand" "dJ"))]
UNSPEC_SYNC_OLD_OP_12))
(clobber (match_scratch:SI 4 "=&d"))]
"GENERATE_LL_SC"
@@ -177,7 +177,7 @@
[(match_operand:SI 2 "register_operand" "d")
(match_operand:SI 3 "register_operand" "d")
(atomic_hiqi_op:SI (match_dup 0)
- (match_operand:SI 4 "register_operand" "dJ"))]
+ (match_operand:SI 4 "reg_or_0_operand" "dJ"))]
UNSPEC_SYNC_OLD_OP_12))
(clobber (match_scratch:SI 5 "=&d"))]
"GENERATE_LL_SC"
@@ -218,7 +218,7 @@
(match_operand:SI 2 "register_operand" "d")
(match_operand:SI 3 "register_operand" "d")
(atomic_hiqi_op:SI (match_dup 0)
- (match_operand:SI 4 "register_operand" "dJ"))]
+ (match_operand:SI 4 "reg_or_0_operand" "dJ"))]
UNSPEC_SYNC_NEW_OP_12))
(set (match_dup 1)
(unspec_volatile:SI
@@ -259,7 +259,7 @@
[(match_operand:SI 1 "register_operand" "d")
(match_operand:SI 2 "register_operand" "d")
(match_dup 0)
- (match_operand:SI 3 "register_operand" "dJ")]
+ (match_operand:SI 3 "reg_or_0_operand" "dJ")]
UNSPEC_SYNC_OLD_OP_12))
(clobber (match_scratch:SI 4 "=&d"))]
"GENERATE_LL_SC"
@@ -298,7 +298,7 @@
(unspec_volatile:SI
[(match_operand:SI 2 "register_operand" "d")
(match_operand:SI 3 "register_operand" "d")
- (match_operand:SI 4 "register_operand" "dJ")]
+ (match_operand:SI 4 "reg_or_0_operand" "dJ")]
UNSPEC_SYNC_OLD_OP_12))
(clobber (match_scratch:SI 5 "=&d"))]
"GENERATE_LL_SC"
@@ -337,7 +337,7 @@
[(match_operand:SI 1 "memory_operand" "+R")
(match_operand:SI 2 "register_operand" "d")
(match_operand:SI 3 "register_operand" "d")
- (match_operand:SI 4 "register_operand" "dJ")]
+ (match_operand:SI 4 "reg_or_0_operand" "dJ")]
UNSPEC_SYNC_NEW_OP_12))
(set (match_dup 1)
(unspec_volatile:SI
@@ -546,7 +546,7 @@
(set (match_dup 1)
(unspec_volatile:SI [(match_operand:SI 2 "register_operand" "d")
(match_operand:SI 3 "register_operand" "d")
- (match_operand:SI 4 "arith_operand" "dJ")]
+ (match_operand:SI 4 "reg_or_0_operand" "dJ")]
UNSPEC_SYNC_EXCHANGE_12))]
"GENERATE_LL_SC"
{ return mips_output_sync_loop (insn, operands); }
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