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Diffstat (limited to 'llvm/test/Transforms/RewriteStatepointsForGC/deopt-bundles/basics.ll')
-rw-r--r-- | llvm/test/Transforms/RewriteStatepointsForGC/deopt-bundles/basics.ll | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/llvm/test/Transforms/RewriteStatepointsForGC/deopt-bundles/basics.ll b/llvm/test/Transforms/RewriteStatepointsForGC/deopt-bundles/basics.ll new file mode 100644 index 00000000000..5197bbb0795 --- /dev/null +++ b/llvm/test/Transforms/RewriteStatepointsForGC/deopt-bundles/basics.ll @@ -0,0 +1,88 @@ +; This is a collection of really basic tests for gc.statepoint rewriting. +; RUN: opt %s -rewrite-statepoints-for-gc -rs4gc-use-deopt-bundles -spp-rematerialization-threshold=0 -S | FileCheck %s + +; Trivial relocation over a single call + +declare void @foo() + +define i8 addrspace(1)* @test1(i8 addrspace(1)* %obj) gc "statepoint-example" { +; CHECK-LABEL: @test1 +entry: +; CHECK-LABEL: entry: +; CHECK-NEXT: gc.statepoint +; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)* +; Two safepoints in a row (i.e. consistent liveness) + call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] + ret i8 addrspace(1)* %obj +} + +define i8 addrspace(1)* @test2(i8 addrspace(1)* %obj) gc "statepoint-example" { +; CHECK-LABEL: @test2 +entry: +; CHECK-LABEL: entry: +; CHECK-NEXT: gc.statepoint +; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)* +; CHECK-NEXT: gc.statepoint +; CHECK-NEXT: %obj.relocated2 = call coldcc i8 addrspace(1)* +; A simple derived pointer + call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] + call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] + ret i8 addrspace(1)* %obj +} + +define i8 @test3(i8 addrspace(1)* %obj) gc "statepoint-example" { +entry: +; CHECK-LABEL: entry: +; CHECK-NEXT: getelementptr +; CHECK-NEXT: gc.statepoint +; CHECK-NEXT: %derived.relocated = call coldcc i8 addrspace(1)* +; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)* +; CHECK-NEXT: load i8, i8 addrspace(1)* %derived.relocated +; CHECK-NEXT: load i8, i8 addrspace(1)* %obj.relocated +; Tests to make sure we visit both the taken and untaken predeccessor +; of merge. This was a bug in the dataflow liveness at one point. + %derived = getelementptr i8, i8 addrspace(1)* %obj, i64 10 + call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] + %a = load i8, i8 addrspace(1)* %derived + %b = load i8, i8 addrspace(1)* %obj + %c = sub i8 %a, %b + ret i8 %c +} + +define i8 addrspace(1)* @test4(i1 %cmp, i8 addrspace(1)* %obj) gc "statepoint-example" { +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)* + call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] + br label %merge + +untaken: ; preds = %entry +; CHECK-LABEL: untaken: +; CHECK-NEXT: gc.statepoint +; CHECK-NEXT: %obj.relocated2 = call coldcc i8 addrspace(1)* + call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] + br label %merge + +merge: ; preds = %untaken, %taken +; CHECK-LABEL: merge: +; CHECK-NEXT: %.0 = phi i8 addrspace(1)* [ %obj.relocated, %taken ], [ %obj.relocated2, %untaken ] +; CHECK-NEXT: ret i8 addrspace(1)* %.0 +; When run over a function which doesn't opt in, should do nothing! + ret i8 addrspace(1)* %obj +} + +define i8 addrspace(1)* @test5(i8 addrspace(1)* %obj) gc "ocaml" { +; CHECK-LABEL: @test5 +entry: +; CHECK-LABEL: entry: +; CHECK-NEXT: gc.statepoint +; CHECK-NOT: %obj.relocated = call coldcc i8 addrspace(1)* + %0 = 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) + ret i8 addrspace(1)* %obj +} + +declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...) |