1; This is a collection of really basic tests for gc.statepoint rewriting. 2; RUN: opt < %s -passes=rewrite-statepoints-for-gc -spp-rematerialization-threshold=0 -S | FileCheck %s 3 4; Trivial relocation over a single call 5 6declare void @foo() 7 8define ptr addrspace(1) @test1(ptr addrspace(1) %obj) gc "statepoint-example" { 9; CHECK-LABEL: @test1 10entry: 11; CHECK-LABEL: entry: 12; CHECK-NEXT: gc.statepoint 13; CHECK-NEXT: %obj.relocated = call coldcc ptr 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 ptr addrspace(1) %obj 17} 18 19define ptr addrspace(1) @test2(ptr addrspace(1) %obj) gc "statepoint-example" { 20; CHECK-LABEL: @test2 21entry: 22; CHECK-LABEL: entry: 23; CHECK-NEXT: gc.statepoint 24; CHECK-NEXT: %obj.relocated = call coldcc ptr addrspace(1) 25; CHECK-NEXT: gc.statepoint 26; CHECK-NEXT: %obj.relocated2 = call coldcc ptr 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 ptr addrspace(1) %obj 31} 32 33define i8 @test3(ptr addrspace(1) %obj) gc "statepoint-example" { 34entry: 35; CHECK-LABEL: entry: 36; CHECK-NEXT: getelementptr 37; CHECK-NEXT: gc.statepoint 38; CHECK-NEXT: %obj.relocated = call coldcc ptr addrspace(1) 39; CHECK-NEXT: %derived.relocated = call coldcc ptr addrspace(1) 40; CHECK-NEXT: load i8, ptr addrspace(1) %derived.relocated 41; CHECK-NEXT: load i8, ptr 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, ptr addrspace(1) %obj, i64 10 45 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] 46 %a = load i8, ptr addrspace(1) %derived 47 %b = load i8, ptr addrspace(1) %obj 48 %c = sub i8 %a, %b 49 ret i8 %c 50} 51 52define ptr addrspace(1) @test4(i1 %cmp, ptr addrspace(1) %obj) gc "statepoint-example" { 53entry: 54 br i1 %cmp, label %taken, label %untaken 55 56taken: ; preds = %entry 57; CHECK-LABEL: taken: 58; CHECK-NEXT: gc.statepoint 59; CHECK-NEXT: %obj.relocated = call coldcc ptr addrspace(1) 60 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] 61 br label %merge 62 63untaken: ; preds = %entry 64; CHECK-LABEL: untaken: 65; CHECK-NEXT: gc.statepoint 66; CHECK-NEXT: %obj.relocated2 = call coldcc ptr addrspace(1) 67 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] 68 br label %merge 69 70merge: ; preds = %untaken, %taken 71; CHECK-LABEL: merge: 72; CHECK-NEXT: %.0 = phi ptr addrspace(1) [ %obj.relocated, %taken ], [ %obj.relocated2, %untaken ] 73; CHECK-NEXT: ret ptr addrspace(1) %.0 74; When run over a function which doesn't opt in, should do nothing! 75 ret ptr addrspace(1) %obj 76} 77 78define ptr addrspace(1) @test5(ptr addrspace(1) %obj) gc "ocaml" { 79; CHECK-LABEL: @test5 80entry: 81; CHECK-LABEL: entry: 82; CHECK-NEXT: gc.statepoint 83; CHECK-NOT: %obj.relocated = call coldcc ptr addrspace(1) 84 %0 = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) ["deopt" (i32 0, i32 -1, i32 0, i32 0, i32 0)] 85 ret ptr addrspace(1) %obj 86} 87 88declare token @llvm.experimental.gc.statepoint.p0(i64, i32, ptr, i32, i32, ...) 89