diff options
| author | Sanjoy Das <sanjoy@playingwithpointers.com> | 2015-05-12 23:52:24 +0000 |
|---|---|---|
| committer | Sanjoy Das <sanjoy@playingwithpointers.com> | 2015-05-12 23:52:24 +0000 |
| commit | a1d39ba940498283f16a3b83507d2e68e269e270 (patch) | |
| tree | ac2e0bc23727ab8bbd02d4d9a9b4a3693e48c619 /llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-11.ll | |
| parent | 89fe570958f8b82df9a9c3b4c251ecba9753272a (diff) | |
| download | bcm5719-llvm-a1d39ba940498283f16a3b83507d2e68e269e270.tar.gz bcm5719-llvm-a1d39ba940498283f16a3b83507d2e68e269e270.zip | |
[Statepoints] Support for "patchable" statepoints.
Summary:
This change adds two new parameters to the statepoint intrinsic, `i64 id`
and `i32 num_patch_bytes`. `id` gets propagated to the ID field
in the generated StackMap section. If the `num_patch_bytes` is
non-zero then the statepoint is lowered to `num_patch_bytes` bytes of
nops instead of a call (the spill and reload code remains unchanged).
A non-zero `num_patch_bytes` is useful in situations where a language
runtime requires complete control over how a call is lowered.
This change brings statepoints one step closer to patchpoints. With
some additional work (that is not part of this patch) it should be
possible to get rid of `TargetOpcode::STATEPOINT` altogether.
PlaceSafepoints generates `statepoint` wrappers with `id` set to
`0xABCDEF00` (the old default value for the ID reported in the stackmap)
and `num_patch_bytes` set to `0`. This can be made more sophisticated
later.
Reviewers: reames, pgavlin, swaroop.sridhar, AndyAyers
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D9546
llvm-svn: 237214
Diffstat (limited to 'llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-11.ll')
| -rw-r--r-- | llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-11.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-11.ll b/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-11.ll index 11e252f43aa..2a7a7444ade 100644 --- a/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-11.ll +++ b/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-11.ll @@ -19,8 +19,8 @@ loop: ; preds = %loop, %entry ; CHECK-DAG: [ %next.relocated.casted, %loop ] %current = phi i64 addrspace(1)* [ %obj, %entry ], [ %next, %loop ] %next = getelementptr i64, i64 addrspace(1)* %current, i32 1 - %safepoint_token = call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0) + %safepoint_token = call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0) br label %loop } -declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()*, i32, i32, ...) +declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
\ No newline at end of file |
