166 lines
5.4 KiB
LLVM
166 lines
5.4 KiB
LLVM
; A collection of liveness test cases to ensure we're reporting the
|
|
; correct live values at statepoints
|
|
; RUN: opt -rewrite-statepoints-for-gc -spp-rematerialization-threshold=0 -S < %s | FileCheck %s
|
|
|
|
; Tests to make sure we consider %obj live in both the taken and untaken
|
|
; predeccessor of merge.
|
|
|
|
define i64 addrspace(1)* @test1(i1 %cmp, i64 addrspace(1)* %obj) gc "statepoint-example" {
|
|
; CHECK-LABEL: @test1
|
|
entry:
|
|
br i1 %cmp, label %taken, label %untaken
|
|
|
|
taken: ; preds = %entry
|
|
; CHECK-LABEL: taken:
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: br label %merge
|
|
call void @foo() [ "deopt"() ]
|
|
br label %merge
|
|
|
|
untaken: ; preds = %entry
|
|
; CHECK-LABEL: untaken:
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: %obj.relocated2 = call coldcc i8 addrspace(1)*
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: br label %merge
|
|
call void @foo() [ "deopt"() ]
|
|
br label %merge
|
|
|
|
merge: ; preds = %untaken, %taken
|
|
; CHECK-LABEL: merge:
|
|
; CHECK-NEXT: %.0 = phi i64 addrspace(1)* [ %obj.relocated.casted, %taken ], [ %obj.relocated2.casted, %untaken ]
|
|
; CHECK-NEXT: ret i64 addrspace(1)* %.0
|
|
; A local kill should not effect liveness in predecessor block
|
|
ret i64 addrspace(1)* %obj
|
|
}
|
|
|
|
define i64 addrspace(1)* @test2(i1 %cmp, i64 addrspace(1)** %loc) gc "statepoint-example" {
|
|
; CHECK-LABEL: @test2
|
|
entry:
|
|
; CHECK-LABEL: entry:
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: br
|
|
call void @foo() [ "deopt"() ]
|
|
br i1 %cmp, label %taken, label %untaken
|
|
|
|
taken: ; preds = %entry
|
|
; CHECK-LABEL: taken:
|
|
; CHECK-NEXT: %obj = load
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: gc.relocate
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: ret i64 addrspace(1)* %obj.relocated.casted
|
|
; A local kill should effect values live from a successor phi. Also, we
|
|
; should only propagate liveness from a phi to the appropriate predecessors.
|
|
%obj = load i64 addrspace(1)*, i64 addrspace(1)** %loc
|
|
call void @foo() [ "deopt"() ]
|
|
ret i64 addrspace(1)* %obj
|
|
|
|
untaken: ; preds = %entry
|
|
ret i64 addrspace(1)* null
|
|
}
|
|
|
|
define i64 addrspace(1)* @test3(i1 %cmp, i64 addrspace(1)** %loc) gc "statepoint-example" {
|
|
; CHECK-LABEL: @test3
|
|
entry:
|
|
br i1 %cmp, label %taken, label %untaken
|
|
|
|
taken: ; preds = %entry
|
|
; CHECK-LABEL: taken:
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: %obj = load
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: br label %merge
|
|
call void @foo() [ "deopt"() ]
|
|
%obj = load i64 addrspace(1)*, i64 addrspace(1)** %loc
|
|
call void @foo() [ "deopt"() ]
|
|
br label %merge
|
|
|
|
untaken: ; preds = %entry
|
|
; CHECK-LABEL: taken:
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: br label %merge
|
|
; A base pointer must be live if it is needed at a later statepoint,
|
|
; even if the base pointer is otherwise unused.
|
|
call void @foo() [ "deopt"() ]
|
|
br label %merge
|
|
|
|
merge: ; preds = %untaken, %taken
|
|
%phi = phi i64 addrspace(1)* [ %obj, %taken ], [ null, %untaken ]
|
|
ret i64 addrspace(1)* %phi
|
|
}
|
|
|
|
define i64 addrspace(1)* @test4(i1 %cmp, i64 addrspace(1)* %obj) gc "statepoint-example" {
|
|
; CHECK-LABEL: @test4
|
|
entry:
|
|
; CHECK-LABEL: entry:
|
|
; CHECK-NEXT: %derived = getelementptr
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: %derived.relocated =
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: %obj.relocated =
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: %derived.relocated2 =
|
|
; CHECK-NEXT: bitcast
|
|
|
|
; Note: It's legal to relocate obj again, but not strictly needed
|
|
; CHECK-NEXT: %obj.relocated3 =
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: ret i64 addrspace(1)* %derived.relocated2.casted
|
|
;
|
|
; Make sure that a phi def visited during iteration is considered a kill.
|
|
; Also, liveness after base pointer analysis can change based on new uses,
|
|
; not just new defs.
|
|
%derived = getelementptr i64, i64 addrspace(1)* %obj, i64 8
|
|
call void @foo() [ "deopt"() ]
|
|
call void @foo() [ "deopt"() ]
|
|
ret i64 addrspace(1)* %derived
|
|
}
|
|
|
|
declare void @consume(...) readonly "gc-leaf-function"
|
|
|
|
define i64 addrspace(1)* @test5(i1 %cmp, i64 addrspace(1)* %obj) gc "statepoint-example" {
|
|
; CHECK-LABEL: @test5
|
|
entry:
|
|
br i1 %cmp, label %taken, label %untaken
|
|
|
|
taken: ; preds = %entry
|
|
; CHECK-LABEL: taken:
|
|
; CHECK-NEXT: gc.statepoint
|
|
; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: br label %merge
|
|
call void @foo() [ "deopt"() ]
|
|
br label %merge
|
|
|
|
untaken: ; preds = %entry
|
|
; CHECK-LABEL: untaken:
|
|
; CHECK-NEXT: br label %merge
|
|
br label %merge
|
|
|
|
merge: ; preds = %untaken, %taken
|
|
; CHECK-LABEL: merge:
|
|
; CHECK-NEXT: %.0 = phi i64 addrspace(1)*
|
|
; CHECK-NEXT: %obj2a = phi
|
|
; CHECK-NEXT: @consume
|
|
; CHECK-NEXT: br label %final
|
|
%obj2a = phi i64 addrspace(1)* [ %obj, %taken ], [ null, %untaken ]
|
|
call void (...) @consume(i64 addrspace(1)* %obj2a)
|
|
br label %final
|
|
|
|
final: ; preds = %merge
|
|
; CHECK-LABEL: final:
|
|
; CHECK-NEXT: @consume
|
|
; CHECK-NEXT: ret i64 addrspace(1)* %.0
|
|
call void (...) @consume(i64 addrspace(1)* %obj2a)
|
|
ret i64 addrspace(1)* %obj
|
|
}
|
|
|
|
declare void @foo()
|
|
|