Bug 123637
| Summary: | "Unsupported speculation use kind: FinalObject" in FTL::LowerDFGToLLVM::compilePhantom() running v8-v6/v8-crypto.js.default-ftl | ||
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| Product: | WebKit | Reporter: | Filip Pizlo <fpizlo> |
| Component: | JavaScriptCore | Assignee: | Filip Pizlo <fpizlo> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | Normal | CC: | barraclough, ggaren, mark.lam, mhahnenberg, msaboff, nrotem, oliver, sam |
| Priority: | P2 | ||
| Version: | 528+ (Nightly build) | ||
| Hardware: | All | ||
| OS: | All | ||
| Bug Depends on: | |||
| Bug Blocks: | 112840 | ||
Filip Pizlo
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Filip Pizlo
This bug is super elusive. I can't repro. It's strange since FinalObjectUse is only used for Identity's that ToThis's are replaced with.
Filip Pizlo
This bug really represents some weirdness, where even though we didn't see a FinalObjectUse at the point where we decide to start the FTL phases, we end up introducing a FinalObjectUse later. That shouldn't happen.
But, we won't ever see this bug again after https://bugs.webkit.org/show_bug.cgi?id=124092. So, I'm marking it as a dupe.
*** This bug has been marked as a duplicate of bug 124092 ***