Port r21313 (3b4cb0b)
Original commit message:
Fix for divisor=1, found during code inspection. We can't hit this bug, due to
HDiv::Canonicalize() discarding the operation, but it might avoid a future bug
hunt. Patch also includes a small tidying of the ARM64 code.
BUG=
R=plind44@gmail.com
Review URL: https://codereview.chromium.org/
277893003
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21317
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
Register scratch = scratch0();
ASSERT(!scratch.is(dividend));
+ // If the divisor is 1, return the dividend.
+ if (divisor == 1) {
+ __ Move(result, dividend);
+ return;
+ }
+
// If the divisor is positive, things are easy: There can be no deopts and we
// can simply do an arithmetic right shift.
- if (divisor == 1) return;
uint16_t shift = WhichPowerOf2Abs(divisor);
if (divisor > 1) {
__ sra(result, dividend, shift);