forked from OSchip/llvm-project
287 lines
10 KiB
LLVM
287 lines
10 KiB
LLVM
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; RUN: opt < %s -rewrite-statepoints-for-gc -spp-rematerialization-threshold=0 -S | FileCheck %s
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; RUN: opt < %s -passes=rewrite-statepoints-for-gc -spp-rematerialization-threshold=0 -S | FileCheck %s
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declare void @foo()
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declare void @use(...) "gc-leaf-function"
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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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; CHECK-LABEL: @test1
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; CHECK-DAG: %obj.relocated
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; CHECK-DAG: %obj2.relocated
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entry:
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call void @foo() [ "deopt"() ]
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br label %joint
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joint: ; preds = %joint2, %entry
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; CHECK-LABEL: joint:
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; CHECK: %phi1 = phi i64 addrspace(1)* [ %obj.relocated.casted, %entry ], [ %obj3, %joint2 ]
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%phi1 = phi i64 addrspace(1)* [ %obj, %entry ], [ %obj3, %joint2 ]
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br i1 %condition, label %use, label %joint2
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use: ; preds = %joint
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br label %joint2
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joint2: ; preds = %use, %joint
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; CHECK-LABEL: joint2:
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; CHECK: %phi2 = phi i64 addrspace(1)* [ %obj.relocated.casted, %use ], [ %obj2.relocated.casted, %joint ]
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; CHECK: %obj3 = getelementptr i64, i64 addrspace(1)* %obj2.relocated.casted, i32 1
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%phi2 = phi i64 addrspace(1)* [ %obj, %use ], [ %obj2, %joint ]
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%obj3 = getelementptr i64, i64 addrspace(1)* %obj2, i32 1
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br label %joint
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}
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declare i64 addrspace(1)* @generate_obj() "gc-leaf-function"
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declare void @consume_obj(i64 addrspace(1)*) "gc-leaf-function"
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declare i1 @rt() "gc-leaf-function"
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define void @test2() gc "statepoint-example" {
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; CHECK-LABEL: @test2
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entry:
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%obj_init = call i64 addrspace(1)* @generate_obj()
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%obj = getelementptr i64, i64 addrspace(1)* %obj_init, i32 42
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br label %loop
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loop: ; preds = %loop.backedge, %entry
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; CHECK: loop:
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; CHECK-DAG: [ %obj_init.relocated.casted, %loop.backedge ]
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; CHECK-DAG: [ %obj_init, %entry ]
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; CHECK-DAG: [ %obj.relocated.casted, %loop.backedge ]
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; CHECK-DAG: [ %obj, %entry ]
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; CHECK-NOT: %location = getelementptr i64, i64 addrspace(1)* %obj, i32 %index
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%index = phi i32 [ 0, %entry ], [ %index.inc, %loop.backedge ]
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%location = getelementptr i64, i64 addrspace(1)* %obj, i32 %index
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call void @consume_obj(i64 addrspace(1)* %location)
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%index.inc = add i32 %index, 1
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%condition = call i1 @rt()
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br i1 %condition, label %loop_x, label %loop_y
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loop_x: ; preds = %loop
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br label %loop.backedge
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loop.backedge: ; preds = %loop_y, %loop_x
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call void @do_safepoint() [ "deopt"() ]
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br label %loop
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loop_y: ; preds = %loop
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br label %loop.backedge
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}
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declare void @some_call(i8 addrspace(1)*) "gc-leaf-function"
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define void @relocate_merge(i1 %cnd, i8 addrspace(1)* %arg) gc "statepoint-example" {
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; CHECK-LABEL: @relocate_merge
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bci_0:
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br i1 %cnd, label %if_branch, label %else_branch
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if_branch: ; preds = %bci_0
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; CHECK-LABEL: if_branch:
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; CHECK: gc.statepoint
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; CHECK: gc.relocate
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call void @foo() [ "deopt"() ]
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br label %join
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else_branch: ; preds = %bci_0
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; CHECK-LABEL: else_branch:
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; CHECK: gc.statepoint
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; CHECK: gc.relocate
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; We need to end up with a single relocation phi updated from both paths
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call void @foo() [ "deopt"() ]
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br label %join
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join: ; preds = %else_branch, %if_branch
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; CHECK-LABEL: join:
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; CHECK: phi i8 addrspace(1)*
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; CHECK-DAG: [ %arg.relocated, %if_branch ]
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; CHECK-DAG: [ %arg.relocated2, %else_branch ]
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; CHECK-NOT: phi
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call void @some_call(i8 addrspace(1)* %arg)
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ret void
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}
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declare void @goo(i64)
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declare i32 @moo(i64 addrspace(1)*)
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; Make sure a use in a statepoint gets properly relocated at a previous one.
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; This is basically just making sure that statepoints aren't accidentally
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; treated specially.
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define void @test3(i64 addrspace(1)* %obj) gc "statepoint-example" {
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; CHECK-LABEL: @test3
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; CHECK: gc.statepoint
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; CHECK-NEXT: gc.relocate
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: gc.statepoint
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entry:
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call void @goo(i64 undef) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
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%0 = call i32 @moo(i64 addrspace(1)* %obj) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
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ret void
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}
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declare i8 addrspace(1)* @boo()
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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: [[RELOCATED:%[^ ]+]] = call {{.*}}gc.relocate
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; CHECK: @use(i8 addrspace(1)* [[RELOCATED]])
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%1 = call i8 addrspace(1)* @boo() [ "deopt"() ]
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%2 = call i8 addrspace(1)* @boo() [ "deopt"() ]
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call void (...) @use(i8 addrspace(1)* %1)
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ret void
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}
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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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%0 = call i8 addrspace(1)* @boo() [ "deopt"() ]
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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: ; preds = %entry
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br label %merge
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merge: ; preds = %kill, %entry, %entry
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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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ret void
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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, 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: ; preds = %entry
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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 void @foo() [ "deopt"(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: ; preds = %do_safepoint, %entry
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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, 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: ; preds = %outer-inc, %bci_0
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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: ; preds = %inner-loop, %outer-loop
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br i1 %cmp, label %inner-loop, label %outer-inc
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outer-inc: ; preds = %inner-loop
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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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call void @foo() [ "deopt"(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, 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: ; preds = %outer-inc, %bci_0
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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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; 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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; CHECK: 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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inner-loop: ; preds = %inner-loop, %outer-loop
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call void @foo() [ "deopt"(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: ; preds = %inner-loop
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; CHECK-LABEL: outer-inc:
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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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br label %outer-loop
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}
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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: ; preds = %entry
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br i1 %condition, label %callbb, label %join2
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callbb: ; preds = %branch2
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call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
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br label %join
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join: ; preds = %callbb, %entry
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; CHECK-LABEL: join:
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; CHECK: phi i64 addrspace(1)* [ %obj.relocated.casted, %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.casted, %callbb ]
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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: ; preds = %join, %branch2
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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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