82e6824eb7
We use slightly different schema for JumpTable on arm64 than for x64. We do a branch (B) to the JumpTable from the code, then a branch (B) to the end of jump table code and then branch to the deoptimizer code with putting the return address into lr register (Call which is actually Blr). As a result the 'from' address in Deoptimizer always points to the end of JumpTable code and we can get nothing from this information. 0) I moved save_doubles and needs_frame code out of for_loop. 1) I replaced B commands with Bl so we put different return addresses to lr register for the different jump table entries and replaced the final Call with Br which do not touch lr register. Also I removed the last_entry check so we will always do the Bl even for the last entry because we need the right address in lr. I don't think that this will affect the performance because it just one more branch for entire deopt mechanics. BUG=chromium:452067 LOG=n Review URL: https://codereview.chromium.org/984893003 Cr-Commit-Position: refs/heads/master@{#27094} |
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