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clang-p2996/llvm/test/Transforms/RewriteStatepointsForGC/basic.ll
Philip Reames 587fa99cfd Default to generating statepoints with deopt and gc-transition bundles if needed 
Continues from D80598.

The key point of the change is to default to using operand bundles instead of the inline length prefix argument lists for statepoint nodes. An important subtlety to note is that the presence of a bundle has semantic meaning, even if it is empty. As such, we need to make a somewhat deeper change to the interface than is first obvious.

Existing code treats statepoint deopt arguments and the deopt bundle operands differently during inlining. The former is ignored (resulting in caller state being dropped), the later is merged.

We can't preserve the old behaviour for calls with deopt fed to RS4GC and then inlining, but we can avoid the no-deopt case changing. At least in internal testing, that seem to be the important one. (I'd argue the "stop merging after RS4GC" behaviour for the former was always "unexpected", but that the behaviour for non-deopt calls actually make sense.)

Differential Revision: https://reviews.llvm.org/D80674
2020-05-28 10:14:23 -07:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -rewrite-statepoints-for-gc < %s | FileCheck %s
; RUN: opt -S -passes=rewrite-statepoints-for-gc < %s | FileCheck %s
declare void @g()
declare i32 @h()
define i32 addrspace(1)* @f0(i32 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK-LABEL: @f0(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @g, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* [[ARG:%.*]]) [ "deopt"(i32 100) ]
; CHECK-NEXT: [[ARG_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 7, i32 7)
; CHECK-NEXT: [[ARG_RELOCATED_CASTED:%.*]] = bitcast i8 addrspace(1)* [[ARG_RELOCATED]] to i32 addrspace(1)*
; CHECK-NEXT: ret i32 addrspace(1)* [[ARG_RELOCATED_CASTED]]
;
entry:
call void @g() [ "deopt"(i32 100) ]
ret i32 addrspace(1)* %arg
}
define i32 addrspace(1)* @f1(i32 addrspace(1)* %arg) gc "statepoint-example" personality i32 8 {
; CHECK-LABEL: @f1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = invoke token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @g, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* [[ARG:%.*]]) [ "deopt"(i32 100) ]
; CHECK-NEXT: to label [[NORMAL_DEST:%.*]] unwind label [[UNWIND_DEST:%.*]]
; CHECK: normal_dest:
; CHECK-NEXT: [[ARG_RELOCATED1:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 7, i32 7)
; CHECK-NEXT: [[ARG_RELOCATED1_CASTED:%.*]] = bitcast i8 addrspace(1)* [[ARG_RELOCATED1]] to i32 addrspace(1)*
; CHECK-NEXT: ret i32 addrspace(1)* [[ARG_RELOCATED1_CASTED]]
; CHECK: unwind_dest:
; CHECK-NEXT: [[LPAD:%.*]] = landingpad token
; CHECK-NEXT: cleanup
; CHECK-NEXT: [[ARG_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[LPAD]], i32 7, i32 7)
; CHECK-NEXT: [[ARG_RELOCATED_CASTED:%.*]] = bitcast i8 addrspace(1)* [[ARG_RELOCATED]] to i32 addrspace(1)*
; CHECK-NEXT: resume token undef
;
entry:
invoke void @g() [ "deopt"(i32 100) ] to label %normal_dest unwind label %unwind_dest
normal_dest:
ret i32 addrspace(1)* %arg
unwind_dest:
%lpad = landingpad token cleanup
resume token undef
}
define i32 addrspace(1)* @f2(i32 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK-LABEL: @f2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, i32 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i32f(i64 2882400000, i32 0, i32 ()* @h, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* [[ARG:%.*]]) [ "deopt"(i32 100) ]
; CHECK-NEXT: [[VAL1:%.*]] = call i32 @llvm.experimental.gc.result.i32(token [[STATEPOINT_TOKEN]])
; CHECK-NEXT: [[ARG_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 7, i32 7)
; CHECK-NEXT: [[ARG_RELOCATED_CASTED:%.*]] = bitcast i8 addrspace(1)* [[ARG_RELOCATED]] to i32 addrspace(1)*
; CHECK-NEXT: store i32 [[VAL1]], i32 addrspace(1)* [[ARG_RELOCATED_CASTED]], align 4
; CHECK-NEXT: ret i32 addrspace(1)* [[ARG_RELOCATED_CASTED]]
;
entry:
%val = call i32 @h() [ "deopt"(i32 100) ]
store i32 %val, i32 addrspace(1)* %arg
ret i32 addrspace(1)* %arg
}
define i32 addrspace(1)* @f3(i32 addrspace(1)* %arg) gc "statepoint-example" personality i32 8 {
; CHECK-LABEL: @f3(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = invoke token (i64, i32, i32 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i32f(i64 2882400000, i32 0, i32 ()* @h, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* [[ARG:%.*]]) [ "deopt"(i32 100) ]
; CHECK-NEXT: to label [[NORMAL_DEST:%.*]] unwind label [[UNWIND_DEST:%.*]]
; CHECK: normal_dest:
; CHECK-NEXT: [[VAL1:%.*]] = call i32 @llvm.experimental.gc.result.i32(token [[STATEPOINT_TOKEN]])
; CHECK-NEXT: [[ARG_RELOCATED2:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 7, i32 7)
; CHECK-NEXT: [[ARG_RELOCATED2_CASTED:%.*]] = bitcast i8 addrspace(1)* [[ARG_RELOCATED2]] to i32 addrspace(1)*
; CHECK-NEXT: store i32 [[VAL1]], i32 addrspace(1)* [[ARG_RELOCATED2_CASTED]], align 4
; CHECK-NEXT: ret i32 addrspace(1)* [[ARG_RELOCATED2_CASTED]]
; CHECK: unwind_dest:
; CHECK-NEXT: [[LPAD:%.*]] = landingpad token
; CHECK-NEXT: cleanup
; CHECK-NEXT: [[ARG_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[LPAD]], i32 7, i32 7)
; CHECK-NEXT: [[ARG_RELOCATED_CASTED:%.*]] = bitcast i8 addrspace(1)* [[ARG_RELOCATED]] to i32 addrspace(1)*
; CHECK-NEXT: resume token undef
;
entry:
%val = invoke i32 @h() [ "deopt"(i32 100) ] to label %normal_dest unwind label %unwind_dest
normal_dest:
store i32 %val, i32 addrspace(1)* %arg
ret i32 addrspace(1)* %arg
unwind_dest:
%lpad = landingpad token cleanup
resume token undef
}
define i32 addrspace(1)* @f4(i32 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK-LABEL: @f4(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @g, i32 0, i32 1, i32 0, i32 0, i32 addrspace(1)* [[ARG:%.*]]) [ "gc-transition"(i32 400, i8 90) ]
; CHECK-NEXT: [[ARG_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 7, i32 7)
; CHECK-NEXT: [[ARG_RELOCATED_CASTED:%.*]] = bitcast i8 addrspace(1)* [[ARG_RELOCATED]] to i32 addrspace(1)*
; CHECK-NEXT: ret i32 addrspace(1)* [[ARG_RELOCATED_CASTED]]
;
entry:
call void @g() [ "gc-transition"(i32 400, i8 90) ]
ret i32 addrspace(1)* %arg
}
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