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 declare void @foo() 5 6 ; Trivial relocation over a single call 7 define i8 addrspace(1)* @test1(i8 addrspace(1)* %obj) gc "statepoint-example" { 8 ; CHECK-LABEL: @test1 9 ; CHECK-LABEL: entry: 10 ; CHECK-NEXT: gc.statepoint 11 ; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)* 12 entry: 13 call i32 (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) 14 ret i8 addrspace(1)* %obj 15 } 16 17 ; Two safepoints in a row (i.e. consistent liveness) 18 define i8 addrspace(1)* @test2(i8 addrspace(1)* %obj) gc "statepoint-example" { 19 ; CHECK-LABEL: @test2 20 ; CHECK-LABEL: entry: 21 ; CHECK-NEXT: gc.statepoint 22 ; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)* 23 ; CHECK-NEXT: gc.statepoint 24 ; CHECK-NEXT: %obj.relocated1 = call coldcc i8 addrspace(1)* 25 entry: 26 call i32 (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) 27 call i32 (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) 28 ret i8 addrspace(1)* %obj 29 } 30 31 ; A simple derived pointer 32 define i8 @test3(i8 addrspace(1)* %obj) gc "statepoint-example" { 33 ; CHECK-LABEL: entry: 34 ; CHECK-NEXT: getelementptr 35 ; CHECK-NEXT: gc.statepoint 36 ; CHECK-NEXT: %derived.relocated = call coldcc i8 addrspace(1)* 37 ; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)* 38 ; CHECK-NEXT: load i8, i8 addrspace(1)* %derived.relocated 39 ; CHECK-NEXT: load i8, i8 addrspace(1)* %obj.relocated 40 entry: 41 %derived = getelementptr i8, i8 addrspace(1)* %obj, i64 10 42 call i32 (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) 43 44 %a = load i8, i8 addrspace(1)* %derived 45 %b = load i8, i8 addrspace(1)* %obj 46 %c = sub i8 %a, %b 47 ret i8 %c 48 } 49 50 ; Tests to make sure we visit both the taken and untaken predeccessor 51 ; of merge. This was a bug in the dataflow liveness at one point. 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: 57 ; CHECK-LABEL: taken: 58 ; CHECK-NEXT: gc.statepoint 59 ; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)* 60 call i32 (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) 61 br label %merge 62 63 untaken: 64 ; CHECK-LABEL: untaken: 65 ; CHECK-NEXT: gc.statepoint 66 ; CHECK-NEXT: %obj.relocated1 = call coldcc i8 addrspace(1)* 67 call i32 (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) 68 br label %merge 69 70 merge: 71 ; CHECK-LABEL: merge: 72 ; CHECK-NEXT: %.0 = phi i8 addrspace(1)* [ %obj.relocated, %taken ], [ %obj.relocated1, %untaken ] 73 ; CHECK-NEXT: ret i8 addrspace(1)* %.0 74 ret i8 addrspace(1)* %obj 75 } 76 77 ; When run over a function which doesn't opt in, should do nothing! 78 define i8 addrspace(1)* @test5(i8 addrspace(1)* %obj) gc "ocaml" { 79 ; CHECK-LABEL: @test5 80 ; CHECK-LABEL: entry: 81 ; CHECK-NEXT: gc.statepoint 82 ; CHECK-NOT: %obj.relocated = call coldcc i8 addrspace(1)* 83 entry: 84 call i32 (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 i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
