https://bugs.webkit.org/show_bug.cgi?id=116767

Source/JavaScriptCore: 

Reviewed by Andreas Kling.
        
The bug is that we were assuming that in the -2^31 case, we already had -2^31
in the result register. This was a wrong assumption.

* dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::compileIntegerArithDivForX86):

LayoutTests: 

Reviewed by Andreas Kling.

* fast/js/dfg-div-by-neg1-and-then-or-zero-interesting-reg-alloc-expected.txt: Added.
* fast/js/dfg-div-by-neg1-and-then-or-zero-interesting-reg-alloc.html: Added.
* fast/js/dfg-div-by-zero-and-then-or-zero-interesting-reg-alloc-expected.txt: Added.
* fast/js/dfg-div-by-zero-and-then-or-zero-interesting-reg-alloc.html: Added.
* fast/js/dfg-div-neg2tothe31-by-one-and-then-or-zero-with-interesting-reg-alloc-expected.txt: Added.
* fast/js/dfg-div-neg2tothe31-by-one-and-then-or-zero-with-interesting-reg-alloc.html: Added.
* fast/js/jsc-test-list:
* fast/js/script-tests/dfg-div-by-neg1-and-then-or-zero-interesting-reg-alloc.js: Added.
(foo):
* fast/js/script-tests/dfg-div-by-zero-and-then-or-zero-interesting-reg-alloc.js: Added.
(foo):
* fast/js/script-tests/dfg-div-neg2tothe31-by-one-and-then-or-zero-with-interesting-reg-alloc.js: Added.
(foo):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150694 268f45cc-cd09-0410-ab3c-d52691b4dbfc