mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-07-20 09:24:58 +00:00
ead2d1fbe0
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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237214 91177308-0d34-0410-b5e6-96231b3b80d8
66 lines
2.2 KiB
LLVM
66 lines
2.2 KiB
LLVM
; RUN: opt -rewrite-statepoints-for-gc -S < %s | FileCheck %s
|
|
|
|
declare void @consume(...)
|
|
|
|
; Test to make sure we destroy LCSSA's single entry phi nodes before
|
|
; running liveness
|
|
define void @test6(i64 addrspace(1)* %obj) gc "statepoint-example" {
|
|
; CHECK-LABEL: @test6
|
|
entry:
|
|
br label %next
|
|
|
|
next:
|
|
; CHECK-LABEL: next:
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: gc.relocate
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: @consume(i64 addrspace(1)* %obj.relocated.casted)
|
|
; CHECK-NEXT: @consume(i64 addrspace(1)* %obj.relocated.casted)
|
|
%obj2 = phi i64 addrspace(1)* [ %obj, %entry ]
|
|
call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @foo, i32 0, i32 0, i32 0, i32 0)
|
|
call void (...) @consume(i64 addrspace(1)* %obj2)
|
|
call void (...) @consume(i64 addrspace(1)* %obj)
|
|
ret void
|
|
}
|
|
|
|
declare void @some_call(i64 addrspace(1)*)
|
|
|
|
; Need to delete unreachable gc.statepoint call
|
|
define void @test7() gc "statepoint-example" {
|
|
; CHECK-LABEL: test7
|
|
; CHECK-NOT: gc.statepoint
|
|
ret void
|
|
|
|
unreached:
|
|
%obj = phi i64 addrspace(1)* [null, %unreached]
|
|
call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @foo, i32 0, i32 0, i32 0, i32 0)
|
|
call void (...) @consume(i64 addrspace(1)* %obj)
|
|
br label %unreached
|
|
}
|
|
|
|
; Need to delete unreachable gc.statepoint invoke - tested seperately given
|
|
; a correct implementation could only remove the instructions, not the block
|
|
define void @test8() gc "statepoint-example" {
|
|
; CHECK-LABEL: test8
|
|
; CHECK-NOT: gc.statepoint
|
|
ret void
|
|
|
|
unreached:
|
|
invoke i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @foo, i32 0, i32 0, i32 0, i32 0)
|
|
to label %normal_return unwind label %exceptional_return
|
|
|
|
normal_return: ; preds = %entry
|
|
ret void
|
|
|
|
exceptional_return: ; preds = %entry
|
|
%landing_pad4 = landingpad { i8*, i32 } personality i32 ()* undef
|
|
cleanup
|
|
ret void
|
|
}
|
|
|
|
declare void @foo()
|
|
; Bound the last check-not
|
|
; CHECK-LABEL: @foo
|
|
|
|
declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
|