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MIPS: Ensure we do not clobber the register holding the elements backing store.

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Port r13061 (83bb6fcc)

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/11316235
Patch from Akos Palfi <palfia@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13084 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
verwaest@chromium.org 2012-11-29 08:39:44 +00:00
parent 7ceeb471f7
commit d84ebd3940
1 changed files with 5 additions and 2 deletions
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7
src/mips/stub-cache-mips.cc
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@ -4746,11 +4746,12 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
// -- a1 : key
// -- a2 : receiver
// -- ra : return address
// -- a3 : scratch
// -- a3 : scratch (elements backing store)
// -- t0 : scratch (elements_reg)
// -- t1 : scratch (mantissa_reg)
// -- t2 : scratch (exponent_reg)
// -- t3 : scratch4
// -- t4 : scratch
// -----------------------------------
Label miss_force_generic, transition_elements_kind, grow, slow;
Label finish_store, check_capacity;
@ -4763,6 +4764,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
Register scratch2 = t1;
Register scratch3 = t2;
Register scratch4 = t3;
Register scratch5 = t4;
Register length_reg = t3;
// This stub is meant to be tail-jumped to, the receiver must already
@ -4858,14 +4860,15 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
__ sw(scratch2, FieldMemOperand(elements_reg, offset + kPointerSize));
}
__ mov(scratch1, elements_reg);
__ StoreNumberToDoubleElements(value_reg,
key_reg,
// All registers after this are overwritten.
elements_reg,
scratch1,
scratch2,
scratch3,
scratch4,
scratch5,
&transition_elements_kind);
// Install the new backing store in the JSArray.