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
20 lines
783 B
LLVM
20 lines
783 B
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 %base_obj
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define i64 addrspace(1)* @test(i64 addrspace(1)* %base_obj, i1 %runtime_condition) gc "statepoint-example" {
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entry:
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br i1 %runtime_condition, label %merge, label %there
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there: ; preds = %entry
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%derived_obj = getelementptr i64, i64 addrspace(1)* %base_obj, i32 1
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br label %merge
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merge: ; preds = %there, %entry
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%merged_value = phi i64 addrspace(1)* [ %base_obj, %entry ], [ %derived_obj, %there ]
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call void @foo() [ "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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declare void @foo()
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