mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +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
111 lines
3.0 KiB
LLVM
111 lines
3.0 KiB
LLVM
; RUN: opt %s -S -place-safepoints | FileCheck %s
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declare i64 addrspace(1)* @"some_call"(i64 addrspace(1)*)
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declare i32 @"personality_function"()
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define i64 addrspace(1)* @test_basic(i64 addrspace(1)* %obj, i64 addrspace(1)* %obj1) gc "statepoint-example" {
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; CHECK-LABEL: entry:
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entry:
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; CHECK: invoke
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; CHECK: statepoint
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; CHECK: some_call
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%ret_val = invoke i64 addrspace(1)* @"some_call"(i64 addrspace(1)* %obj)
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to label %normal_return unwind label %exceptional_return
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; CHECK-LABEL: normal_return:
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; CHECK: gc.result
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; CHECK: ret i64
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normal_return:
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ret i64 addrspace(1)* %ret_val
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; CHECK-LABEL: exceptional_return:
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; CHECK: landingpad
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; CHECK: ret i64
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exceptional_return:
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%landing_pad4 = landingpad {i8*, i32} personality i32 ()* @"personality_function"
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cleanup
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ret i64 addrspace(1)* %obj1
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}
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define i64 addrspace(1)* @test_two_invokes(i64 addrspace(1)* %obj, i64 addrspace(1)* %obj1) gc "statepoint-example" {
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; CHECK-LABEL: entry:
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entry:
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; CHECK: invoke
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; CHECK: statepoint
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; CHECK: some_call
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%ret_val1 = invoke i64 addrspace(1)* @"some_call"(i64 addrspace(1)* %obj)
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to label %second_invoke unwind label %exceptional_return
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; CHECK-LABEL: second_invoke:
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second_invoke:
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; CHECK: invoke
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; CHECK: statepoint
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; CHECK: some_call
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%ret_val2 = invoke i64 addrspace(1)* @"some_call"(i64 addrspace(1)* %ret_val1)
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to label %normal_return unwind label %exceptional_return
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; CHECK-LABEL: normal_return:
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normal_return:
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; CHECK: gc.result
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; CHECK: ret i64
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ret i64 addrspace(1)* %ret_val2
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; CHECK: exceptional_return:
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; CHECK: ret i64
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exceptional_return:
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%landing_pad4 = landingpad {i8*, i32} personality i32 ()* @"personality_function"
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cleanup
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ret i64 addrspace(1)* %obj1
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}
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define i64 addrspace(1)* @test_phi_node(i1 %cond, i64 addrspace(1)* %obj) gc "statepoint-example" {
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; CHECK-LABEL: @test_phi_node
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; CHECK-LABEL: entry:
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entry:
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br i1 %cond, label %left, label %right
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left:
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%ret_val_left = invoke i64 addrspace(1)* @"some_call"(i64 addrspace(1)* %obj)
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to label %merge unwind label %exceptional_return
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right:
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%ret_val_right = invoke i64 addrspace(1)* @"some_call"(i64 addrspace(1)* %obj)
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to label %merge unwind label %exceptional_return
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; CHECK: merge[[A:[0-9]]]:
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; CHECK: gc.result
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; CHECK: br label %[[with_phi:merge[0-9]*]]
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; CHECK: merge[[B:[0-9]]]:
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; CHECK: gc.result
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; CHECK: br label %[[with_phi]]
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; CHECK: [[with_phi]]:
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; CHECK: phi
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; CHECK: ret i64 addrspace(1)* %ret_val
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merge:
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%ret_val = phi i64 addrspace(1)* [%ret_val_left, %left], [%ret_val_right, %right]
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ret i64 addrspace(1)* %ret_val
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; CHECK-LABEL: exceptional_return:
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; CHECK: ret i64 addrspace(1)*
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exceptional_return:
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%landing_pad4 = landingpad {i8*, i32} personality i32 ()* @"personality_function"
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cleanup
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ret i64 addrspace(1)* %obj
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}
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declare void @do_safepoint()
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define void @gc.safepoint_poll() {
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; CHECK-LABEL: gc.safepoint_poll
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; CHECK-LABEL: entry
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; CHECK-NEXT: do_safepoint
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; CHECK-NEXT: ret void
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entry:
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call void @do_safepoint()
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ret void
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} |