Commit Graph

5 Commits

Author SHA1 Message Date
Sanjoy Das e0aa414acf All llvm.deoptimize declarations must use the same calling convention
This new verifier rule lets us unambigously pick a calling convention
when creating a new declaration for
`@llvm.experimental.deoptimize.<ty>`.  It is also congruent with our
lowering strategy -- since all calls to `@llvm.experimental.deoptimize`
are lowered to calls to `__llvm_deoptimize`, it is reasonable to enforce
a unique calling convention.

Some of the tests that were breaking this verifier rule have had to be
split up into different .ll files.

The inliner was violating this rule as well, and has been fixed to avoid
producing invalid IR.

llvm-svn: 269261
2016-05-12 01:17:38 +00:00
Sanjoy Das 65a60670e8 Lower @llvm.experimental.deoptimize as a noreturn call
While preserving the return value for @llvm.experimental.deoptimize at
the IR level is useful during mid-level optimization, doing so at the
machine instruction level requires generating some extra code and a
return that is non-ideal.  This change has LLVM lower

```
  %val = call @llvm.experimental.deoptimize
  ret %val
```

to effectively

```
  call @__llvm_deoptimize()
  unreachable
```

instead.

llvm-svn: 265502
2016-04-06 01:33:49 +00:00
Sanjoy Das 9d41a8f269 Don't use an i64 return type with webkit_jscc
Re-enable an assertion enabled by Justin Lebar in rL265092.  rL265092
was breaking test/CodeGen/X86/deopt-intrinsic.ll because webkit_jscc
does not like non-i64 return types.  Change the test case to not do
that.

llvm-svn: 265099
2016-04-01 02:51:21 +00:00
Sanjoy Das 6bcfe31820 Match call and target calling conventions in test
Fixes an issue in rL264329.

llvm-svn: 264337
2016-03-24 20:51:24 +00:00
Sanjoy Das df9ae70f49 Add lowering support for llvm.experimental.deoptimize
Summary:
Only adds support for "naked" calls to llvm.experimental.deoptimize.
Support for round-tripping through RewriteStatepointsForGC will come
as a separate patch (should be simpler than this one).

Reviewers: reames

Subscribers: sanjoy, mcrosier, llvm-commits

Differential Revision: http://reviews.llvm.org/D18429

llvm-svn: 264329
2016-03-24 20:23:29 +00:00