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48c396748c
Goal of this change is to guarantee stable ordering of the statepoint arguments and other newly inserted values such as gc.relocates. Previously we had explicit sorting in a couple of places. However for unnamed values ordering was partial and overall we didn't have any strong invariant regarding it. This change switches all data structures to use SetVector's and MapVector's which provide possibility for deterministic iteration over them. Explicit sorting is now redundant and was removed. Differential Revision: http://reviews.llvm.org/D19669 llvm-svn: 268502
89 lines
3.3 KiB
LLVM
89 lines
3.3 KiB
LLVM
; This is a collection of really basic tests for gc.statepoint rewriting.
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; RUN: opt < %s -rewrite-statepoints-for-gc -spp-rematerialization-threshold=0 -S | FileCheck %s
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; Trivial relocation over a single call
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declare void @foo()
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define i8 addrspace(1)* @test1(i8 addrspace(1)* %obj) gc "statepoint-example" {
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; CHECK-LABEL: @test1
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entry:
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; CHECK-LABEL: entry:
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; CHECK-NEXT: gc.statepoint
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; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
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; Two safepoints in a row (i.e. consistent liveness)
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call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
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ret i8 addrspace(1)* %obj
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}
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define i8 addrspace(1)* @test2(i8 addrspace(1)* %obj) gc "statepoint-example" {
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; CHECK-LABEL: @test2
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entry:
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; CHECK-LABEL: entry:
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; CHECK-NEXT: gc.statepoint
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; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
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; CHECK-NEXT: gc.statepoint
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; CHECK-NEXT: %obj.relocated2 = call coldcc i8 addrspace(1)*
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; A simple derived pointer
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call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
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call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
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ret i8 addrspace(1)* %obj
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}
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define i8 @test3(i8 addrspace(1)* %obj) gc "statepoint-example" {
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entry:
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; CHECK-LABEL: entry:
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; CHECK-NEXT: getelementptr
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; CHECK-NEXT: gc.statepoint
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; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
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; CHECK-NEXT: %derived.relocated = call coldcc i8 addrspace(1)*
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; CHECK-NEXT: load i8, i8 addrspace(1)* %derived.relocated
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; CHECK-NEXT: load i8, i8 addrspace(1)* %obj.relocated
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; Tests to make sure we visit both the taken and untaken predeccessor
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; of merge. This was a bug in the dataflow liveness at one point.
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%derived = getelementptr i8, i8 addrspace(1)* %obj, i64 10
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call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
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%a = load i8, i8 addrspace(1)* %derived
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%b = load i8, i8 addrspace(1)* %obj
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%c = sub i8 %a, %b
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ret i8 %c
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}
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define i8 addrspace(1)* @test4(i1 %cmp, i8 addrspace(1)* %obj) gc "statepoint-example" {
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entry:
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br i1 %cmp, label %taken, label %untaken
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taken: ; preds = %entry
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; CHECK-LABEL: taken:
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; CHECK-NEXT: gc.statepoint
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; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
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call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
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br label %merge
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untaken: ; preds = %entry
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; CHECK-LABEL: untaken:
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; CHECK-NEXT: gc.statepoint
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; CHECK-NEXT: %obj.relocated2 = call coldcc i8 addrspace(1)*
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call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
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br label %merge
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merge: ; preds = %untaken, %taken
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; CHECK-LABEL: merge:
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; CHECK-NEXT: %.0 = phi i8 addrspace(1)* [ %obj.relocated, %taken ], [ %obj.relocated2, %untaken ]
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; CHECK-NEXT: ret i8 addrspace(1)* %.0
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; When run over a function which doesn't opt in, should do nothing!
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ret i8 addrspace(1)* %obj
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}
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define i8 addrspace(1)* @test5(i8 addrspace(1)* %obj) gc "ocaml" {
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; CHECK-LABEL: @test5
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entry:
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; CHECK-LABEL: entry:
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; CHECK-NEXT: gc.statepoint
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; CHECK-NOT: %obj.relocated = call coldcc i8 addrspace(1)*
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%0 = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @foo, i32 0, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
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ret i8 addrspace(1)* %obj
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}
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declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
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