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TheRock/compiler/amd-llvm/llvm/test/Transforms/GlobalOpt/null-check-global-value.ll
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derek.holloway 7502bf64a4
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2026-09-02 16:34:47 -07:00

33 lines
766 B
LLVM

; RUN: opt -passes=globalopt -S < %s | FileCheck %s
%sometype = type { ptr }
@map = internal unnamed_addr global ptr null, align 8
define void @Init() {
; CHECK-LABEL: @Init(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i1 true, ptr @map.init, align 1
; CHECK-NEXT: ret void
;
entry:
%call = tail call noalias nonnull dereferenceable(48) ptr @_Znwm(i64 48)
store ptr %call, ptr @map, align 8
ret void
}
define void @Usage() {
; CHECK-LABEL: @Usage(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[MAP_INIT_VAL:%.*]] = load i1, ptr @map.init, align 1
; CHECK-NEXT: [[NOTINIT:%.*]] = xor i1 [[MAP_INIT_VAL]], true
; CHECK-NEXT: unreachable
;
entry:
%0 = load ptr, ptr @map, align 8
%.not = icmp eq ptr %0, null
unreachable
}
declare ptr @_Znwm(i64)