25ec1a3e60
Summary: This is a step towards using operand bundles to carry deopt state till RewriteStatepointsForGC. The change adds a flag to RewriteStatepointsForGC that teaches it to pick up deopt state from a `"deopt"` operand bundle attached to the `call` or `invoke` it is wrapping. The command line flag added, `-rs4gc-use-deopt-bundles`, will only exist for a short while. Once we are able to pipe deopt bundle state through the full optimization pipeline without problems, we will "constant fold" `-rs4gc-use-deopt-bundles` to `true`. Reviewers: swaroop.sridhar, reames Subscribers: llvm-commits, sanjoy Differential Revision: http://reviews.llvm.org/D13372 llvm-svn: 250489
46 lines
1.9 KiB
LLVM
46 lines
1.9 KiB
LLVM
; RUN: opt %s -rewrite-statepoints-for-gc -rs4gc-use-deopt-bundles -spp-print-base-pointers -S 2>&1 | FileCheck %s
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; CHECK: derived %merged_value base %merged_value.base
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declare void @site_for_call_safpeoint()
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define i64 addrspace(1)* @test(i64 addrspace(1)* %base_obj_x, i64 addrspace(1)* %base_obj_y, i1 %runtime_condition_x, i1 %runtime_condition_y) gc "statepoint-example" {
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entry:
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br i1 %runtime_condition_x, label %here, label %there
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here: ; preds = %entry
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br i1 %runtime_condition_y, label %bump_here_a, label %bump_here_b
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bump_here_a: ; preds = %here
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%x_a = getelementptr i64, i64 addrspace(1)* %base_obj_x, i32 1
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br label %merge_here
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bump_here_b: ; preds = %here
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%x_b = getelementptr i64, i64 addrspace(1)* %base_obj_y, i32 2
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br label %merge_here
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merge_here: ; preds = %bump_here_b, %bump_here_a
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; CHECK: merge_here:
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; CHECK-DAG: %x.base
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; CHECK-DAG: phi i64 addrspace(1)*
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; CHECK-DAG: [ %base_obj_x, %bump_here_a ]
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; CHECK-DAG: [ %base_obj_y, %bump_here_b ]
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%x = phi i64 addrspace(1)* [ %x_a, %bump_here_a ], [ %x_b, %bump_here_b ]
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br label %merge
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there: ; preds = %entry
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%y = getelementptr i64, i64 addrspace(1)* %base_obj_y, i32 1
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br label %merge
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merge: ; preds = %there, %merge_here
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; CHECK: merge:
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; CHECK-DAG: %merged_value.base
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; CHECK-DAG: phi i64 addrspace(1)*
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; CHECK-DAG: %merge_here
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; CHECK-DAG: [ %base_obj_y, %there ]
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; CHECK: %merged_value = phi i64 addrspace(1)* [ %x, %merge_here ], [ %y, %there ]
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%merged_value = phi i64 addrspace(1)* [ %x, %merge_here ], [ %y, %there ]
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call void @site_for_call_safpeoint() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
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ret i64 addrspace(1)* %merged_value
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}
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