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
21 lines
780 B
LLVM
21 lines
780 B
LLVM
; RUN: opt %s -rewrite-statepoints-for-gc -rs4gc-use-deopt-bundles -spp-print-base-pointers -S 2>&1 | FileCheck %s
|
|
|
|
; CHECK: derived %next base %base_obj
|
|
|
|
declare i1 @runtime_value() "gc-leaf-function"
|
|
|
|
define void @maybe_GEP(i64 addrspace(1)* %base_obj) gc "statepoint-example" {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop: ; preds = %loop, %entry
|
|
%current = phi i64 addrspace(1)* [ %base_obj, %entry ], [ %next, %loop ]
|
|
%condition = call i1 @runtime_value()
|
|
%maybe_next = getelementptr i64, i64 addrspace(1)* %current, i32 1
|
|
%next = select i1 %condition, i64 addrspace(1)* %maybe_next, i64 addrspace(1)* %current
|
|
call void @do_safepoint() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
|
|
br label %loop
|
|
}
|
|
|
|
declare void @do_safepoint()
|