statepoint.ll
4.62 KB
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; RUN: opt -S %s -verify | FileCheck %s
declare void @use(...)
declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token, i32, i32)
declare i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token, i32, i32)
declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
declare token @llvm.experimental.gc.statepoint.p0f_isVoidp0s_structsf(i64, i32, void (%struct*)*, i32, i32, ...)
declare i32 @"personality_function"()
;; Basic usage
define i64 addrspace(1)* @test1(i8 addrspace(1)* %arg) gc "statepoint-example" {
entry:
%cast = bitcast i8 addrspace(1)* %arg to i64 addrspace(1)*
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) ["gc-live" (i8 addrspace(1)* %arg, i64 addrspace(1)* %cast, i8 addrspace(1)* %arg, i8 addrspace(1)* %arg), "deopt" (i32 0, i32 0, i32 0, i32 10, i32 0)]
%reloc = call i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %safepoint_token, i32 0, i32 1)
;; It is perfectly legal to relocate the same value multiple times...
%reloc2 = call i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %safepoint_token, i32 0, i32 1)
%reloc3 = call i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %safepoint_token, i32 1, i32 0)
ret i64 addrspace(1)* %reloc
; CHECK-LABEL: test1
; CHECK: statepoint
; CHECK: gc.relocate
; CHECK: gc.relocate
; CHECK: gc.relocate
; CHECK: ret i64 addrspace(1)* %reloc
}
; This test catches two cases where the verifier was too strict:
; 1) A base doesn't need to be relocated if it's never used again
; 2) A value can be replaced by one which is known equal. This
; means a potentially derived pointer can be known base and that
; we can't check that derived pointer are never bases.
define void @test2(i8 addrspace(1)* %arg, i64 addrspace(1)* %arg2) gc "statepoint-example" {
entry:
%cast = bitcast i8 addrspace(1)* %arg to i64 addrspace(1)*
%c = icmp eq i64 addrspace(1)* %cast, %arg2
br i1 %c, label %equal, label %notequal
notequal:
ret void
equal:
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) ["gc-live" (i8 addrspace(1)* %arg, i64 addrspace(1)* %cast, i8 addrspace(1)* %arg, i8 addrspace(1)* %arg), "deopt" (i32 0, i32 0, i32 0, i32 10, i32 0)]
%reloc = call i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %safepoint_token, i32 0, i32 0)
call void undef(i64 addrspace(1)* %reloc)
ret void
; CHECK-LABEL: test2
; CHECK-LABEL: equal
; CHECK: statepoint
; CHECK-NEXT: %reloc = call
; CHECK-NEXT: call
; CHECK-NEXT: ret voi
}
; Basic test for invoke statepoints
define i8 addrspace(1)* @test3(i8 addrspace(1)* %obj, i8 addrspace(1)* %obj1) gc "statepoint-example" personality i32 ()* @"personality_function" {
; CHECK-LABEL: test3
entry:
; CHECK-LABEL: entry
; CHECK: statepoint
%0 = invoke token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) ["gc-live" (i8 addrspace(1)* %obj, i8 addrspace(1)* %obj1), "deopt" (i32 0, i32 -1, i32 0, i32 0, i32 0)]
to label %normal_dest unwind label %exceptional_return
normal_dest:
; CHECK-LABEL: normal_dest:
; CHECK: gc.relocate
; CHECK: gc.relocate
; CHECK: ret
%obj.relocated = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %0, i32 0, i32 0)
%obj1.relocated = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %0, i32 1, i32 1)
ret i8 addrspace(1)* %obj.relocated
exceptional_return:
; CHECK-LABEL: exceptional_return
; CHECK: gc.relocate
; CHECK: gc.relocate
%landing_pad = landingpad token
cleanup
%obj.relocated1 = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %landing_pad, i32 0, i32 0)
%obj1.relocated1 = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %landing_pad, i32 1, i32 1)
ret i8 addrspace(1)* %obj1.relocated1
}
; Test for statepoint with sret attribute.
; This should be allowed as long as the wrapped function is not vararg.
%struct = type { i64, i64, i64 }
declare void @fn_sret(%struct* sret)
define void @test_sret() gc "statepoint-example" {
%x = alloca %struct
%statepoint_token = call token (i64, i32, void (%struct*)*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidp0s_structsf(i64 0, i32 0, void (%struct*)* @fn_sret, i32 1, i32 0, %struct* sret %x, i32 0, i32 0)
ret void
; CHECK-LABEL: test_sret
; CHECK: alloca
; CHECK: statepoint
; CHECK-SAME: sret
; CHECK: ret
}