1 ; This is a collection of really basic tests for gc.statepoint rewriting. 2 ; RUN: opt < %s -rewrite-statepoints-for-gc -spp-rematerialization-threshold=0 -S | FileCheck %s 3 4 ; Trivial relocation over a single call 5 6 declare void @foo() 7 8 define i8 addrspace(1)* @test1(i8 addrspace(1)* %obj) gc "statepoint-example" { 9 ; CHECK-LABEL: @test1 10 entry: 11 ; CHECK-LABEL: entry: 12 ; CHECK-NEXT: gc.statepoint 13 ; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)* 14 ; Two safepoints in a row (i.e. consistent liveness) 15 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] 16 ret i8 addrspace(1)* %obj 17 } 18 19 define i8 addrspace(1)* @test2(i8 addrspace(1)* %obj) gc "statepoint-example" { 20 ; CHECK-LABEL: @test2 21 entry: 22 ; CHECK-LABEL: entry: 23 ; CHECK-NEXT: gc.statepoint 24 ; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)* 25 ; CHECK-NEXT: gc.statepoint 26 ; CHECK-NEXT: %obj.relocated2 = call coldcc i8 addrspace(1)* 27 ; A simple derived pointer 28 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] 29 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] 30 ret i8 addrspace(1)* %obj 31 } 32 33 define i8 @test3(i8 addrspace(1)* %obj) gc "statepoint-example" { 34 entry: 35 ; CHECK-LABEL: entry: 36 ; CHECK-NEXT: getelementptr 37 ; CHECK-NEXT: gc.statepoint 38 ; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)* 39 ; CHECK-NEXT: %derived.relocated = call coldcc i8 addrspace(1)* 40 ; CHECK-NEXT: load i8, i8 addrspace(1)* %derived.relocated 41 ; CHECK-NEXT: load i8, i8 addrspace(1)* %obj.relocated 42 ; Tests to make sure we visit both the taken and untaken predeccessor 43 ; of merge. This was a bug in the dataflow liveness at one point. 44 %derived = getelementptr i8, i8 addrspace(1)* %obj, i64 10 45 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] 46 %a = load i8, i8 addrspace(1)* %derived 47 %b = load i8, i8 addrspace(1)* %obj 48 %c = sub i8 %a, %b 49 ret i8 %c 50 } 51 52 define i8 addrspace(1)* @test4(i1 %cmp, i8 addrspace(1)* %obj) gc "statepoint-example" { 53 entry: 54 br i1 %cmp, label %taken, label %untaken 55 56 taken: ; preds = %entry 57 ; CHECK-LABEL: taken: 58 ; CHECK-NEXT: gc.statepoint 59 ; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)* 60 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] 61 br label %merge 62 63 untaken: ; preds = %entry 64 ; CHECK-LABEL: untaken: 65 ; CHECK-NEXT: gc.statepoint 66 ; CHECK-NEXT: %obj.relocated2 = call coldcc i8 addrspace(1)* 67 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] 68 br label %merge 69 70 merge: ; preds = %untaken, %taken 71 ; CHECK-LABEL: merge: 72 ; CHECK-NEXT: %.0 = phi i8 addrspace(1)* [ %obj.relocated, %taken ], [ %obj.relocated2, %untaken ] 73 ; CHECK-NEXT: ret i8 addrspace(1)* %.0 74 ; When run over a function which doesn't opt in, should do nothing! 75 ret i8 addrspace(1)* %obj 76 } 77 78 define i8 addrspace(1)* @test5(i8 addrspace(1)* %obj) gc "ocaml" { 79 ; CHECK-LABEL: @test5 80 entry: 81 ; CHECK-LABEL: entry: 82 ; CHECK-NEXT: gc.statepoint 83 ; CHECK-NOT: %obj.relocated = call coldcc i8 addrspace(1)* 84 %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) 85 ret i8 addrspace(1)* %obj 86 } 87 88 declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...) 89
