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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=licm < %s | FileCheck %s
%class.LiveThread = type { i64, ptr }
@globallive = external dso_local global i64, align 8
; The store should not be sunk (via scalar promotion) past the cmpxchg.
define void @test(ptr %live_thread) {
; CHECK-LABEL: @test(
; CHECK-NEXT: [[NEXT_UNPROCESSED_:%.*]] = getelementptr inbounds [[CLASS_LIVETHREAD:%.*]], ptr [[LIVE_THREAD:%.*]], i64 0, i32 1
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: store ptr undef, ptr [[NEXT_UNPROCESSED_]], align 8
; CHECK-NEXT: [[XCHG:%.*]] = cmpxchg weak ptr @globallive, i64 undef, i64 undef release monotonic, align 8
; CHECK-NEXT: [[DONE:%.*]] = extractvalue { i64, i1 } [[XCHG]], 1
; CHECK-NEXT: br i1 [[DONE]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
%next_unprocessed_ = getelementptr inbounds %class.LiveThread, ptr %live_thread, i64 0, i32 1
br label %loop
loop:
store ptr undef, ptr %next_unprocessed_, align 8
%xchg = cmpxchg weak ptr @globallive, i64 undef, i64 undef release monotonic, align 8
%done = extractvalue { i64, i1 } %xchg, 1
br i1 %done, label %exit, label %loop
exit:
ret void
}
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