Revision: 18777
Author: [email protected]
Date: Thu Jan 23 13:43:44 2014 UTC
Log: A64: fix out-of-range conditional jump in RegExpMacroAssemblerA64.
BUG=314606
TEST=mjsunit/regress/regress-crbug-178790
[email protected]
Review URL: https://codereview.chromium.org/132033006
http://code.google.com/p/v8/source/detail?r=18777
Modified:
/branches/experimental/a64/src/a64/regexp-macro-assembler-a64.cc
=======================================
--- /branches/experimental/a64/src/a64/regexp-macro-assembler-a64.cc Wed
Jan 22 12:46:44 2014 UTC
+++ /branches/experimental/a64/src/a64/regexp-macro-assembler-a64.cc Thu
Jan 23 13:43:44 2014 UTC
@@ -1455,10 +1455,14 @@
return;
}
if (to == NULL) {
- __ B(condition, &backtrack_label_);
- return;
+ to = &backtrack_label_;
}
- __ B(condition, to);
+ // TODO(ulan): do direct jump when jump distance is known and fits in
imm19.
+ Condition inverted_condition = InvertCondition(condition);
+ Label no_branch;
+ __ B(inverted_condition, &no_branch);
+ __ B(to);
+ __ Bind(&no_branch);
}
void RegExpMacroAssemblerA64::CompareAndBranchOrBacktrack(Register reg,
@@ -1469,11 +1473,15 @@
if (to == NULL) {
to = &backtrack_label_;
}
+ // TODO(ulan): do direct jump when jump distance is known and fits in
imm19.
+ Label no_branch;
if (condition == eq) {
- __ Cbz(reg, to);
+ __ Cbnz(reg, &no_branch);
} else {
- __ Cbnz(reg, to);
+ __ Cbz(reg, &no_branch);
}
+ __ B(to);
+ __ Bind(&no_branch);
} else {
__ Cmp(reg, immediate);
BranchOrBacktrack(condition, to);
--
--
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