RESOLVED FIXED 183914
Add placeholder call and jump MacroAssembler emitters that take PtrTag in a register. 
https://bugs.webkit.org/show_bug.cgi?id=183914
Summary Add placeholder call and jump MacroAssembler emitters that take PtrTag in a r...
Mark Lam
Reported 2018-03-22 13:05:25 PDT
This is in preparation for supporting pointer profiling work.
Attachments
proposed patch. (10.12 KB, patch)
2018-03-22 13:09 PDT, Mark Lam 		no flags
DetailsFormatted DiffDiff
proposed patch. (10.12 KB, patch)
2018-03-22 13:21 PDT, Mark Lam 		no flags
DetailsFormatted DiffDiff
proposed patch. (9.93 KB, patch)
2018-03-22 13:26 PDT, Mark Lam 		no flags
DetailsFormatted DiffDiff
proposed patch. (9.91 KB, patch)
2018-03-22 13:29 PDT, Mark Lam 		saam: review+
DetailsFormatted DiffDiff
Show Obsolete (3) View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2018-03-22 13:06:28 PDT
<rdar://problem/38763536>
Mark Lam
Comment 2 2018-03-22 13:09:47 PDT
Created attachment 336299 [details] proposed patch.
Mark Lam
Comment 3 2018-03-22 13:21:45 PDT
Created attachment 336302 [details] proposed patch.
Mark Lam
Comment 4 2018-03-22 13:26:43 PDT
Created attachment 336303 [details] proposed patch.
Mark Lam
Comment 5 2018-03-22 13:29:51 PDT
Created attachment 336305 [details] proposed patch.
Mark Lam
Comment 6 2018-03-22 14:24:46 PDT
Thanks for the review. Landed in r229863: <http://trac.webkit.org/r229863>.
Filip Pizlo
Comment 7 2018-04-13 13:40:08 PDT
Comment on attachment 336305 [details] proposed patch. This change is pretty crazy. First of all, the intended use of call tags is that they should be constants, so having them be passed in register by default is revealing a weird ARMism - in all other places, constants are passed to the assembler as constants, not as registers. Second, it means that call(register) now means something completely different than what anyone would expect it to mean: it means a patchable call and the register is ignored! Is it possible to roll this out?
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