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
36 lines
1.4 KiB
LLVM
36 lines
1.4 KiB
LLVM
; RUN: opt %s -rewrite-statepoints-for-gc -rs4gc-use-deopt-bundles -spp-print-base-pointers -S 2>&1 | FileCheck %s
|
|
|
|
|
|
declare i1 @runtime_value() "gc-leaf-function"
|
|
|
|
declare void @do_safepoint()
|
|
|
|
define void @select_of_phi(i64 addrspace(1)* %base_obj_x, i64 addrspace(1)* %base_obj_y) gc "statepoint-example" {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop: ; preds = %merge, %entry
|
|
%current_x = phi i64 addrspace(1)* [ %base_obj_x, %entry ], [ %next_x, %merge ]
|
|
%current_y = phi i64 addrspace(1)* [ %base_obj_y, %entry ], [ %next_y, %merge ]
|
|
%current = phi i64 addrspace(1)* [ null, %entry ], [ %next, %merge ]
|
|
%condition = call i1 @runtime_value()
|
|
%next_x = getelementptr i64, i64 addrspace(1)* %current_x, i32 1
|
|
%next_y = getelementptr i64, i64 addrspace(1)* %current_y, i32 1
|
|
br i1 %condition, label %true, label %false
|
|
|
|
true: ; preds = %loop
|
|
br label %merge
|
|
|
|
false: ; preds = %loop
|
|
br label %merge
|
|
|
|
merge: ; preds = %false, %true
|
|
%next = phi i64 addrspace(1)* [ %next_x, %true ], [ %next_y, %false ]
|
|
call void @do_safepoint() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
|
|
br label %loop
|
|
}
|
|
; CHECK: Base Pairs (w/o Relocation):
|
|
; CHECK-DAG: derived %next base %next.base
|
|
; CHECK-DAG: derived %next_x base %base_obj_x
|
|
; CHECK-DAG: derived %next_y base %base_obj_y
|