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[RewriteStatepointsForGC] Yet more test cases for relocation
At this point, we should have decent coverage of the involved code. I've got a few more test cases to cleanup and submit, but what's here is already reasonable. I've got a collection of liveness tests which will be posted for review along with a decent liveness algorithm in the next few days. Once those are in, the code in this file should be well tested and I can start renaming things without risk of serious breakage. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231414 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Philip Reames
parent
40b4f60056
commit
292f5ef237
@ -2,6 +2,7 @@
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declare void @foo()
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declare void @use(...)
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define i64 addrspace(1)* @test1(i64 addrspace(1)* %obj, i64 addrspace(1)* %obj2, i1 %condition) gc "statepoint-example" {
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entry:
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@ -113,11 +114,182 @@ entry:
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ret void
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}
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declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidi64f(void (i64)*, i32, i32, ...)
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; Check specifically for the case where the result of a statepoint needs to
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; be relocated itself
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define void @test4() gc "statepoint-example" {
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; CHECK-LABEL: @test4
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; CHECK: gc.statepoint
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; CHECK: gc.result
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; CHECK: gc.statepoint
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; CHECK: gc.relocate
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; CHECK: @use(i8 addrspace(1)* %res.relocated)
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%safepoint_token2 = tail call i32 (i8 addrspace(1)* ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_p1i8f(i8 addrspace(1)* ()* undef, i32 0, i32 0, i32 0)
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%res = call i8 addrspace(1)* @llvm.experimental.gc.result.ptr.p1i8(i32 %safepoint_token2)
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call i32 (i8 addrspace(1)* ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_p1i8f(i8 addrspace(1)* ()* undef, i32 0, i32 0, i32 0)
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call void (...)* @use(i8 addrspace(1)* %res)
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unreachable
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}
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declare i32 @llvm.experimental.gc.statepoint.p0f_i32p1i64f(i32 (i64 addrspace(1)*)*, i32, i32, ...)
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; Test updating a phi where not all inputs are live to begin with
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define void @test5(i8 addrspace(1)* %arg) gc "statepoint-example" {
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; CHECK-LABEL: test5
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entry:
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call i32 (i8 addrspace(1)* ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_p1i8f(i8 addrspace(1)* ()* undef, i32 0, i32 0, i32 0)
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switch i32 undef, label %kill [
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i32 10, label %merge
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i32 13, label %merge
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]
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kill:
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br label %merge
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merge:
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; CHECK: merge:
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; CHECK: %test = phi i8 addrspace(1)
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; CHECK-DAG: [ null, %kill ]
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; CHECK-DAG: [ %arg.relocated, %entry ]
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; CHECK-DAG: [ %arg.relocated, %entry ]
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%test = phi i8 addrspace(1)* [ null, %kill ], [ %arg, %entry ], [ %arg, %entry ]
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call void (...)* @use(i8 addrspace(1)* %test)
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unreachable
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}
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; Check to make sure we handle values live over an entry statepoint
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define void @test6(i8 addrspace(1)* %arg1, i8 addrspace(1)* %arg2,
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i8 addrspace(1)* %arg3) gc "statepoint-example" {
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; CHECK-LABEL: @test6
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entry:
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br i1 undef, label %gc.safepoint_poll.exit2, label %do_safepoint
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do_safepoint:
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; CHECK-LABEL: do_safepoint:
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; CHECK: gc.statepoint
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; CHECK: arg1.relocated =
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; CHECK: arg2.relocated =
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; CHECK: arg3.relocated =
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call i32 (void ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 3, i8 addrspace(1)* %arg1, i8 addrspace(1)* %arg2, i8 addrspace(1)* %arg3)
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br label %gc.safepoint_poll.exit2
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gc.safepoint_poll.exit2:
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; CHECK-LABEL: gc.safepoint_poll.exit2:
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; CHECK: phi i8 addrspace(1)*
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; CHECK-DAG: [ %arg3, %entry ]
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; CHECK-DAG: [ %arg3.relocated, %do_safepoint ]
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; CHECK: phi i8 addrspace(1)*
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; CHECK-DAG: [ %arg2, %entry ]
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; CHECK-DAG: [ %arg2.relocated, %do_safepoint ]
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; CHECK: phi i8 addrspace(1)*
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; CHECK-DAG: [ %arg1, %entry ]
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; CHECK-DAG: [ %arg1.relocated, %do_safepoint ]
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call void (...)* @use(i8 addrspace(1)* %arg1, i8 addrspace(1)* %arg2, i8 addrspace(1)* %arg3)
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ret void
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}
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; Check relocation in a loop nest where a relocation happens in the outer
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; but not the inner loop
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define void @test_outer_loop(i8 addrspace(1)* %arg1, i8 addrspace(1)* %arg2,
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i1 %cmp) gc "statepoint-example" {
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; CHECK-LABEL: @test_outer_loop
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bci_0:
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br label %outer-loop
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outer-loop:
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; CHECK-LABEL: outer-loop:
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; CHECK: phi i8 addrspace(1)* [ %arg2, %bci_0 ], [ %arg2.relocated, %outer-inc ]
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; CHECK: phi i8 addrspace(1)* [ %arg1, %bci_0 ], [ %arg1.relocated, %outer-inc ]
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br label %inner-loop
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inner-loop:
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br i1 %cmp, label %inner-loop, label %outer-inc
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outer-inc:
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; CHECK-LABEL: outer-inc:
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; CHECK: %arg1.relocated
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; CHECK: %arg2.relocated
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%safepoint_token = call i32 (void ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 2, i8 addrspace(1)* %arg1, i8 addrspace(1)* %arg2)
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br label %outer-loop
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}
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; Check that both inner and outer loops get phis when relocation is in
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; inner loop
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define void @test_inner_loop(i8 addrspace(1)* %arg1, i8 addrspace(1)* %arg2,
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i1 %cmp) gc "statepoint-example" {
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; CHECK-LABEL: @test_inner_loop
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bci_0:
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br label %outer-loop
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outer-loop:
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; CHECK-LABEL: outer-loop:
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; CHECK: phi i8 addrspace(1)* [ %arg2, %bci_0 ], [ %arg2.relocated, %outer-inc ]
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; CHECK: phi i8 addrspace(1)* [ %arg1, %bci_0 ], [ %arg1.relocated, %outer-inc ]
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br label %inner-loop
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inner-loop:
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; CHECK-LABEL: inner-loop
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; CHECK: phi i8 addrspace(1)*
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; CHECK-DAG: %outer-loop ]
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; CHECK-DAG: [ %arg2.relocated, %inner-loop ]
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; CHECKL phi i8 addrspace(1)*
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; CHECK-DAG: %outer-loop ]
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; CHECK-DAG: [ %arg1.relocated, %inner-loop ]
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; CHECK: gc.statepoint
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; CHECK: %arg1.relocated
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; CHECK: %arg2.relocated
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%safepoint_token = call i32 (void ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 2, i8 addrspace(1)* %arg1, i8 addrspace(1)* %arg2)
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br i1 %cmp, label %inner-loop, label %outer-inc
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outer-inc:
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; CHECK-LABEL: outer-inc:
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br label %outer-loop
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}
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; This test shows why updating just those uses of the original value being
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; relocated dominated by the inserted relocation is not always sufficient.
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define i64 addrspace(1)* @test7(i64 addrspace(1)* %obj, i64 addrspace(1)* %obj2, i1 %condition) gc "statepoint-example" {
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; CHECK-LABEL: @test7
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entry:
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br i1 %condition, label %branch2, label %join
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branch2:
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br i1 %condition, label %callbb, label %join2
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callbb:
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%safepoint_token = call i32 (void ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
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br label %join
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join:
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; CHECK-LABEL: join:
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; CHECK: phi i64 addrspace(1)* [ %obj.relocated, %callbb ], [ %obj, %entry ]
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; CHECK: phi i64 addrspace(1)*
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; CHECK-DAG: [ %obj, %entry ]
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; CHECK-DAG: [ %obj2.relocated, %callbb ]
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; This is a phi outside the dominator region of the new defs inserted by
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; the safepoint, BUT we can't stop the search here or we miss the second
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; phi below.
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%phi1 = phi i64 addrspace(1)* [ %obj, %entry ], [ %obj2, %callbb ]
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br label %join2
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join2:
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; CHECK-LABEL: join2:
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; CHECK: phi2 = phi i64 addrspace(1)*
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; CHECK-DAG: %join ]
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; CHECK-DAG: [ %obj2, %branch2 ]
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%phi2 = phi i64 addrspace(1)* [ %obj, %join ], [ %obj2, %branch2 ]
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ret i64 addrspace(1)* %phi2
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}
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declare void @do_safepoint()
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declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()*, i32, i32, ...)
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declare i32 @llvm.experimental.gc.statepoint.p0f_p1i8f(i8 addrspace(1)* ()*, i32, i32, ...)
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declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidi64f(void (i64)*, i32, i32, ...)
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declare i32 @llvm.experimental.gc.statepoint.p0f_i32p1i64f(i32 (i64 addrspace(1)*)*, i32, i32, ...)
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declare i8 addrspace(1)* @llvm.experimental.gc.result.ptr.p1i8(i32) #3
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