[Webkit-unassigned] [Bug 170473] New: On ARM, DFG::SpeculativeJIT::compileArithMod() failed to ensure result is of DataFormatInt32.
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Tue Apr 4 14:50:12 PDT 2017
https://bugs.webkit.org/show_bug.cgi?id=170473
Bug ID: 170473
Summary: On ARM, DFG::SpeculativeJIT::compileArithMod() failed
to ensure result is of DataFormatInt32.
Product: WebKit
Version: WebKit Local Build
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: JavaScriptCore
Assignee: webkit-unassigned at lists.webkit.org
Reporter: mark.lam at apple.com
In Unchecked mode, when DFG::SpeculativeJIT::compileArithMod() detects that the divisor is 0, it just returns the divisor as the result. However, the result is expected to be of DataFormatIn32, but the divisor in this case is of DataFormatJSInt32. The fix is to return an immediate 0 instead.
<rdar://problem/29912391>
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