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TheRock/compiler/amd-llvm/llvm/test/Transforms/RewriteStatepointsForGC/call-gc-result.ll
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55 lines
1.7 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=rewrite-statepoints-for-gc -S | FileCheck %s
;; This test is to verify that gc_result from a call statepoint
;; can have preceding phis in its parent basic block. Unlike
;; invoke statepoint, call statepoint does not terminate the
;; block, and thus its gc_result is in the same block with the
;; call statepoint.
declare i32 @foo()
define i32 @test1(i1 %cond, i32 %a) gc "statepoint-example" {
; CHECK-LABEL: @test1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[BRANCH1:%.*]], label [[BRANCH2:%.*]]
; CHECK: branch1:
; CHECK-NEXT: [[B:%.*]] = add i32 [[A:%.*]], 1
; CHECK-NEXT: br label [[MERGE:%.*]]
; CHECK: branch2:
; CHECK-NEXT: br label [[MERGE]]
; CHECK: merge:
; CHECK-NEXT: [[PHI:%.*]] = phi i32 [ [[A]], [[BRANCH2]] ], [ [[B]], [[BRANCH1]] ]
; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(i32 ()) @foo, i32 0, i32 0, i32 0, i32 0)
; CHECK-NEXT: [[RET1:%.*]] = call i32 @llvm.experimental.gc.result.i32(token [[STATEPOINT_TOKEN]])
; CHECK-NEXT: ret i32 [[RET1]]
;
entry:
br i1 %cond, label %branch1, label %branch2
branch1:
%b = add i32 %a, 1
br label %merge
branch2:
br label %merge
merge:
%phi = phi i32 [ %a, %branch2 ], [ %b, %branch1 ]
%ret = call i32 @foo()
ret i32 %ret
}
; This function is inlined when inserting a poll.
declare void @do_safepoint()
define void @gc.safepoint_poll() {
; CHECK-LABEL: @gc.safepoint_poll(
; CHECK-NEXT: entry:
; CHECK-NEXT: call void @do_safepoint()
; CHECK-NEXT: ret void
;
entry:
call void @do_safepoint()
ret void
}