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[Attributor] Use known non-flat AS before getAssumedAddrSpace #143221

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Jun 9, 2025
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[Attributor] Use known non-flat AS before getAssumedAddrSpace #143221

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29 changes: 24 additions & 5 deletions llvm/lib/Transforms/IPO/AttributorAttributes.cpp
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Expand Up @@ -12592,19 +12592,38 @@ struct AAAddressSpaceImpl : public AAAddressSpace {

ChangeStatus updateImpl(Attributor &A) override {
uint32_t OldAddressSpace = AssumedAddressSpace;
unsigned FlatAS = A.getInfoCache().getFlatAddressSpace().value();

auto CheckAddressSpace = [&](Value &Obj) {
// Ignore undef.
if (isa<UndefValue>(&Obj))
return true;
if (auto *Arg = dyn_cast<Argument>(&Obj)) {

// If the object already has a non-flat address space, we simply take it.
unsigned ObjAS = Obj.getType()->getPointerAddressSpace();
if (ObjAS != FlatAS)
return takeAddressSpace(ObjAS);

// At this point, we know Obj is in the flat address space. For a final
// attempt, we want to use getAssumedAddrSpace, but first we must get the
// associated function, if possible.
Function *F = nullptr;
if (auto *Arg = dyn_cast<Argument>(&Obj))
F = Arg->getParent();
else if (auto *I = dyn_cast<Instruction>(&Obj))
F = I->getFunction();

// Use getAssumedAddrSpace if the associated function exists.
if (F) {
auto *TTI =
A.getInfoCache().getAnalysisResultForFunction<TargetIRAnalysis>(
*Arg->getParent());
unsigned AssumedAS = TTI->getAssumedAddrSpace(Arg);
A.getInfoCache().getAnalysisResultForFunction<TargetIRAnalysis>(*F);
unsigned AssumedAS = TTI->getAssumedAddrSpace(&Obj);
if (AssumedAS != ~0U)
return takeAddressSpace(AssumedAS);
}
return takeAddressSpace(Obj.getType()->getPointerAddressSpace());

// Now we can't do anything else but to take the flat AS.
return takeAddressSpace(FlatAS);
};

auto *AUO = A.getOrCreateAAFor<AAUnderlyingObjects>(getIRPosition(), this,
Expand Down
25 changes: 25 additions & 0 deletions llvm/test/CodeGen/AMDGPU/aa-as-infer.ll
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Expand Up @@ -276,3 +276,28 @@ define void @kernel_argument_promotion_pattern_inter_procedure(ptr %p, i32 %val)
call void @use_argument_after_promotion(ptr %p.cast.1, i32 %val)
ret void
}

define amdgpu_kernel void @kernel_argument_with_known_as(ptr addrspace(1) %p1, ptr addrspace(3) %p3, i32 %val) {
; CHECK-LABEL: define amdgpu_kernel void @kernel_argument_with_known_as(
; CHECK-SAME: ptr addrspace(1) [[P1:%.*]], ptr addrspace(3) [[P3:%.*]], i32 [[VAL:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[P1_CAST:%.*]] = addrspacecast ptr addrspace(1) [[P1]] to ptr
; CHECK-NEXT: [[P3_CAST:%.*]] = addrspacecast ptr addrspace(3) [[P3]] to ptr
; CHECK-NEXT: [[B:%.*]] = icmp eq i32 [[VAL]], 0
; CHECK-NEXT: [[P:%.*]] = select i1 [[B]], ptr [[P1_CAST]], ptr [[P3_CAST]]
; CHECK-NEXT: [[ATOMIC_ADD:%.*]] = atomicrmw add ptr [[P]], i32 1 syncscope("agent") seq_cst, align 4, !noalias.addrspace [[META0:![0-9]+]], !amdgpu.no.fine.grained.memory [[META1:![0-9]+]], !amdgpu.no.remote.memory [[META1]]
; CHECK-NEXT: ret void
;
%p1.cast = addrspacecast ptr addrspace(1) %p1 to ptr
%p3.cast = addrspacecast ptr addrspace(3) %p3 to ptr
%b = icmp eq i32 %val, 0
%p = select i1 %b, ptr %p1.cast, ptr %p3.cast
%atomic.add = atomicrmw add ptr %p, i32 1 syncscope("agent") seq_cst, align 4, !noalias.addrspace !0, !amdgpu.no.fine.grained.memory !1, !amdgpu.no.remote.memory !1
ret void
}

!0 = !{i32 5, i32 6}
!1 = !{}
;.
; CHECK: [[META0]] = !{i32 5, i32 6}
; CHECK: [[META1]] = !{}
;.
28 changes: 18 additions & 10 deletions llvm/test/Transforms/OpenMP/nested_parallelism.ll
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Expand Up @@ -64,7 +64,8 @@ define weak_odr protected ptx_kernel void @__omp_offloading_10302_bd7e0_main_l13
; CHECK-NEXT: br label [[_Z3FOOI_INTERNALIZED_EXIT]]
; CHECK: _Z3fooi.internalized.exit:
; CHECK-NEXT: tail call void @__kmpc_barrier_simple_spmd(ptr nonnull @[[GLOB1]], i32 [[TMP2]]) #[[ATTR2]]
; CHECK-NEXT: store ptr addrspacecast (ptr addrspace(3) @i_shared to ptr), ptr [[CAPTURED_VARS_ADDRS_I]], align 8
; CHECK-NEXT: [[TMP4:%.*]] = addrspacecast ptr [[CAPTURED_VARS_ADDRS_I]] to ptr addrspace(5)
; CHECK-NEXT: store ptr addrspacecast (ptr addrspace(3) @i_shared to ptr), ptr addrspace(5) [[TMP4]], align 8
; CHECK-NEXT: call void @__kmpc_parallel_51(ptr nonnull @[[GLOB1]], i32 [[TMP1]], i32 1, i32 -1, i32 -1, ptr nonnull @__omp_outlined__, ptr nonnull @__omp_outlined___wrapper, ptr nonnull [[CAPTURED_VARS_ADDRS_I]], i64 1)
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr nonnull [[CAPTURED_VARS_ADDRS_I]])
; CHECK-NEXT: call void @__kmpc_target_deinit()
Expand Down Expand Up @@ -109,7 +110,8 @@ define hidden void @_Z3fooi(i32 noundef %i1) local_unnamed_addr #1 {
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @__kmpc_global_thread_num(ptr nonnull @[[GLOB1]]) #[[ATTR2]]
; CHECK-NEXT: [[I:%.*]] = tail call align 16 dereferenceable_or_null(4) ptr @__kmpc_alloc_shared(i64 4) #[[ATTR2]]
; CHECK-NEXT: store i32 [[I1:%.*]], ptr [[I]], align 16
; CHECK-NEXT: store ptr [[I]], ptr [[CAPTURED_VARS_ADDRS]], align 8
; CHECK-NEXT: [[TMP1:%.*]] = addrspacecast ptr [[CAPTURED_VARS_ADDRS]] to ptr addrspace(5)
; CHECK-NEXT: store ptr [[I]], ptr addrspace(5) [[TMP1]], align 8
; CHECK-NEXT: call void @__kmpc_parallel_51(ptr nonnull @[[GLOB1]], i32 [[TMP0]], i32 1, i32 -1, i32 -1, ptr nonnull @__omp_outlined__, ptr nonnull @__omp_outlined___wrapper, ptr nonnull [[CAPTURED_VARS_ADDRS]], i64 1)
; CHECK-NEXT: call void @__kmpc_free_shared(ptr [[I]], i64 4) #[[ATTR2]]
; CHECK-NEXT: ret void
Expand Down Expand Up @@ -141,7 +143,8 @@ define weak_odr protected ptx_kernel void @__omp_offloading_10302_bd7e0_main_l16
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr nonnull [[CAPTURED_VARS_ADDRS_I]])
; CHECK-NEXT: [[TMP1:%.*]] = tail call i32 @__kmpc_global_thread_num(ptr nonnull @[[GLOB1]]) #[[ATTR2]]
; CHECK-NEXT: store i32 [[I_ADDR_SROA_0_0_EXTRACT_TRUNC]], ptr addrspace(3) @i.i_shared, align 16
; CHECK-NEXT: store ptr addrspacecast (ptr addrspace(3) @i.i_shared to ptr), ptr [[CAPTURED_VARS_ADDRS_I]], align 8
; CHECK-NEXT: [[TMP2:%.*]] = addrspacecast ptr [[CAPTURED_VARS_ADDRS_I]] to ptr addrspace(5)
; CHECK-NEXT: store ptr addrspacecast (ptr addrspace(3) @i.i_shared to ptr), ptr addrspace(5) [[TMP2]], align 8
; CHECK-NEXT: call void @__kmpc_parallel_51(ptr nonnull @[[GLOB1]], i32 [[TMP1]], i32 1, i32 -1, i32 -1, ptr nonnull @__omp_outlined__1, ptr nonnull @__omp_outlined__1_wrapper, ptr nonnull [[CAPTURED_VARS_ADDRS_I]], i64 1)
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr nonnull [[CAPTURED_VARS_ADDRS_I]])
; CHECK-NEXT: call void @__kmpc_target_deinit()
Expand Down Expand Up @@ -175,7 +178,8 @@ define hidden void @_Z4foo1i(i32 noundef %i1) local_unnamed_addr #1 {
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @__kmpc_global_thread_num(ptr nonnull @[[GLOB1]]) #[[ATTR2]]
; CHECK-NEXT: [[I:%.*]] = tail call align 16 dereferenceable_or_null(4) ptr @__kmpc_alloc_shared(i64 4) #[[ATTR2]]
; CHECK-NEXT: store i32 [[I1:%.*]], ptr [[I]], align 16
; CHECK-NEXT: store ptr [[I]], ptr [[CAPTURED_VARS_ADDRS]], align 8
; CHECK-NEXT: [[TMP1:%.*]] = addrspacecast ptr [[CAPTURED_VARS_ADDRS]] to ptr addrspace(5)
; CHECK-NEXT: store ptr [[I]], ptr addrspace(5) [[TMP1]], align 8
; CHECK-NEXT: call void @__kmpc_parallel_51(ptr nonnull @[[GLOB1]], i32 [[TMP0]], i32 1, i32 -1, i32 -1, ptr nonnull @__omp_outlined__1, ptr nonnull @__omp_outlined__1_wrapper, ptr nonnull [[CAPTURED_VARS_ADDRS]], i64 1)
; CHECK-NEXT: call void @__kmpc_free_shared(ptr [[I]], i64 4) #[[ATTR2]]
; CHECK-NEXT: ret void
Expand All @@ -202,7 +206,8 @@ define internal void @__omp_outlined__(ptr noalias nocapture readnone %.global_t
; CHECK-NEXT: [[TMP1:%.*]] = tail call i32 @__kmpc_global_thread_num(ptr nonnull @[[GLOB1]]) #[[ATTR2]]
; CHECK-NEXT: [[I_I:%.*]] = tail call align 16 dereferenceable_or_null(4) ptr @__kmpc_alloc_shared(i64 4) #[[ATTR2]]
; CHECK-NEXT: store i32 [[TMP0]], ptr [[I_I]], align 16
; CHECK-NEXT: store ptr [[I_I]], ptr [[CAPTURED_VARS_ADDRS_I]], align 8
; CHECK-NEXT: [[TMP2:%.*]] = addrspacecast ptr [[CAPTURED_VARS_ADDRS_I]] to ptr addrspace(5)
; CHECK-NEXT: store ptr [[I_I]], ptr addrspace(5) [[TMP2]], align 8
; CHECK-NEXT: call void @__kmpc_parallel_51(ptr nonnull @[[GLOB1]], i32 [[TMP1]], i32 1, i32 -1, i32 -1, ptr nonnull @__omp_outlined__1, ptr nonnull @__omp_outlined__1_wrapper, ptr nonnull [[CAPTURED_VARS_ADDRS_I]], i64 1)
; CHECK-NEXT: call void @__kmpc_free_shared(ptr [[I_I]], i64 4) #[[ATTR2]]
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr nonnull [[CAPTURED_VARS_ADDRS_I]])
Expand All @@ -228,15 +233,17 @@ define internal void @__omp_outlined___wrapper(i16 zeroext %0, i32 %1) #5 {
; CHECK-NEXT: [[CAPTURED_VARS_ADDRS_I_I:%.*]] = alloca [1 x ptr], align 8
; CHECK-NEXT: [[GLOBAL_ARGS:%.*]] = alloca ptr, align 8
; CHECK-NEXT: call void @__kmpc_get_shared_variables(ptr nonnull [[GLOBAL_ARGS]])
; CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[GLOBAL_ARGS]], align 8
; CHECK-NEXT: [[TMP5:%.*]] = addrspacecast ptr [[GLOBAL_ARGS]] to ptr addrspace(5)
; CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr addrspace(5) [[TMP5]], align 8
; CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[TMP2]], align 8
; CHECK-NEXT: [[TMP4:%.*]] = load i32, ptr [[TMP3]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr nonnull [[CAPTURED_VARS_ADDRS_I_I]])
; CHECK-NEXT: [[TMP5:%.*]] = call i32 @__kmpc_global_thread_num(ptr nonnull @[[GLOB1]]) #[[ATTR2]]
; CHECK-NEXT: [[TMP6:%.*]] = call i32 @__kmpc_global_thread_num(ptr nonnull @[[GLOB1]]) #[[ATTR2]]
; CHECK-NEXT: [[I_I_I:%.*]] = call align 16 dereferenceable_or_null(4) ptr @__kmpc_alloc_shared(i64 4) #[[ATTR2]]
; CHECK-NEXT: store i32 [[TMP4]], ptr [[I_I_I]], align 16
; CHECK-NEXT: store ptr [[I_I_I]], ptr [[CAPTURED_VARS_ADDRS_I_I]], align 8
; CHECK-NEXT: call void @__kmpc_parallel_51(ptr nonnull @[[GLOB1]], i32 [[TMP5]], i32 1, i32 -1, i32 -1, ptr nonnull @__omp_outlined__1, ptr nonnull @__omp_outlined__1_wrapper, ptr nonnull [[CAPTURED_VARS_ADDRS_I_I]], i64 1)
; CHECK-NEXT: [[TMP7:%.*]] = addrspacecast ptr [[CAPTURED_VARS_ADDRS_I_I]] to ptr addrspace(5)
; CHECK-NEXT: store ptr [[I_I_I]], ptr addrspace(5) [[TMP7]], align 8
; CHECK-NEXT: call void @__kmpc_parallel_51(ptr nonnull @[[GLOB1]], i32 [[TMP6]], i32 1, i32 -1, i32 -1, ptr nonnull @__omp_outlined__1, ptr nonnull @__omp_outlined__1_wrapper, ptr nonnull [[CAPTURED_VARS_ADDRS_I_I]], i64 1)
; CHECK-NEXT: call void @__kmpc_free_shared(ptr [[I_I_I]], i64 4) #[[ATTR2]]
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr nonnull [[CAPTURED_VARS_ADDRS_I_I]])
; CHECK-NEXT: ret void
Expand Down Expand Up @@ -287,7 +294,8 @@ define internal void @__omp_outlined__1_wrapper(i16 zeroext %0, i32 %1) #5 {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[GLOBAL_ARGS:%.*]] = alloca ptr, align 8
; CHECK-NEXT: call void @__kmpc_get_shared_variables(ptr nonnull [[GLOBAL_ARGS]])
; CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[GLOBAL_ARGS]], align 8
; CHECK-NEXT: [[TMP5:%.*]] = addrspacecast ptr [[GLOBAL_ARGS]] to ptr addrspace(5)
; CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr addrspace(5) [[TMP5]], align 8
; CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[TMP2]], align 8
; CHECK-NEXT: [[TMP4:%.*]] = load i32, ptr [[TMP3]], align 4
; CHECK-NEXT: [[INC_I:%.*]] = add nsw i32 [[TMP4]], 1
Expand Down
34 changes: 22 additions & 12 deletions llvm/test/Transforms/OpenMP/remove_globalization.ll
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Expand Up @@ -163,17 +163,22 @@ define internal void @convert_and_move_alloca() {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[DOTH2S:%.*]] = alloca i8, i64 4, align 4
; CHECK-NEXT: [[IV_PTR:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[UB_PTR:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[TMP0:%.*]] = addrspacecast ptr [[UB_PTR]] to ptr addrspace(5)
; CHECK-NEXT: br label [[INITLOOP:%.*]]
; CHECK: initloop:
; CHECK-NEXT: store i32 0, ptr [[IV_PTR]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = addrspacecast ptr [[IV_PTR]] to ptr addrspace(5)
; CHECK-NEXT: store i32 0, ptr addrspace(5) [[TMP1]], align 4
; CHECK-NEXT: br label [[LOOPBODY:%.*]]
; CHECK: loopbody:
; CHECK-NEXT: [[IV:%.*]] = load i32, ptr [[IV_PTR]], align 4
; CHECK-NEXT: [[TMP0:%.*]] = icmp eq i32 [[IV]], 10
; CHECK-NEXT: br i1 [[TMP0]], label [[EXIT:%.*]], label [[LOOPINC:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = addrspacecast ptr [[IV_PTR]] to ptr addrspace(5)
; CHECK-NEXT: [[IV:%.*]] = load i32, ptr addrspace(5) [[TMP2]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = icmp eq i32 [[IV]], 10
; CHECK-NEXT: br i1 [[TMP3]], label [[EXIT:%.*]], label [[LOOPINC:%.*]]
; CHECK: loopinc:
; CHECK-NEXT: [[INC:%.*]] = add i32 [[IV]], 1
; CHECK-NEXT: store i32 [[INC]], ptr [[IV_PTR]], align 4
; CHECK-NEXT: [[TMP4:%.*]] = addrspacecast ptr [[IV_PTR]] to ptr addrspace(5)
; CHECK-NEXT: store i32 [[INC]], ptr addrspace(5) [[TMP4]], align 4
; CHECK-NEXT: br label [[LOOPBODY]]
; CHECK: exit:
; CHECK-NEXT: ret void
Expand All @@ -183,17 +188,22 @@ define internal void @convert_and_move_alloca() {
; CHECK-DISABLED-NEXT: entry:
; CHECK-DISABLED-NEXT: [[DOTH2S:%.*]] = alloca i8, i64 4, align 4
; CHECK-DISABLED-NEXT: [[IV_PTR:%.*]] = alloca i32, align 4
; CHECK-DISABLED-NEXT: [[UB_PTR:%.*]] = alloca i32, align 4
; CHECK-DISABLED-NEXT: [[TMP0:%.*]] = addrspacecast ptr [[UB_PTR]] to ptr addrspace(5)
; CHECK-DISABLED-NEXT: br label [[INITLOOP:%.*]]
; CHECK-DISABLED: initloop:
; CHECK-DISABLED-NEXT: store i32 0, ptr [[IV_PTR]], align 4
; CHECK-DISABLED-NEXT: [[TMP1:%.*]] = addrspacecast ptr [[IV_PTR]] to ptr addrspace(5)
; CHECK-DISABLED-NEXT: store i32 0, ptr addrspace(5) [[TMP1]], align 4
; CHECK-DISABLED-NEXT: br label [[LOOPBODY:%.*]]
; CHECK-DISABLED: loopbody:
; CHECK-DISABLED-NEXT: [[IV:%.*]] = load i32, ptr [[IV_PTR]], align 4
; CHECK-DISABLED-NEXT: [[TMP0:%.*]] = icmp eq i32 [[IV]], 10
; CHECK-DISABLED-NEXT: br i1 [[TMP0]], label [[EXIT:%.*]], label [[LOOPINC:%.*]]
; CHECK-DISABLED-NEXT: [[TMP2:%.*]] = addrspacecast ptr [[IV_PTR]] to ptr addrspace(5)
; CHECK-DISABLED-NEXT: [[IV:%.*]] = load i32, ptr addrspace(5) [[TMP2]], align 4
; CHECK-DISABLED-NEXT: [[TMP3:%.*]] = icmp eq i32 [[IV]], 10
; CHECK-DISABLED-NEXT: br i1 [[TMP3]], label [[EXIT:%.*]], label [[LOOPINC:%.*]]
; CHECK-DISABLED: loopinc:
; CHECK-DISABLED-NEXT: [[INC:%.*]] = add i32 [[IV]], 1
; CHECK-DISABLED-NEXT: store i32 [[INC]], ptr [[IV_PTR]], align 4
; CHECK-DISABLED-NEXT: [[TMP4:%.*]] = addrspacecast ptr [[IV_PTR]] to ptr addrspace(5)
; CHECK-DISABLED-NEXT: store i32 [[INC]], ptr addrspace(5) [[TMP4]], align 4
; CHECK-DISABLED-NEXT: br label [[LOOPBODY]]
; CHECK-DISABLED: exit:
; CHECK-DISABLED-NEXT: ret void
Expand Down Expand Up @@ -268,7 +278,7 @@ declare void @unknown_no_openmp() "llvm.assume"="omp_no_openmp"
; CHECK-DISABLED: attributes #[[ATTR6]] = { nounwind }
;.
; CHECK: [[META0:![0-9]+]] = distinct !DICompileUnit(language: DW_LANG_C99, file: [[META1:![0-9]+]], producer: "{{.*}}clang version {{.*}}", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: [[META2:![0-9]+]], splitDebugInlining: false, nameTableKind: None)
; CHECK: [[META1]] = !DIFile(filename: "remove_globalization.c", directory: {{.*}})
; CHECK: [[META1]] = !DIFile(filename: "{{.*}}remove_globalization.c", directory: {{.*}})
; CHECK: [[META2]] = !{}
; CHECK: [[META3:![0-9]+]] = !{i32 2, !"Debug Info Version", i32 3}
; CHECK: [[META4:![0-9]+]] = !{i32 1, !"wchar_size", i32 4}
Expand All @@ -279,7 +289,7 @@ declare void @unknown_no_openmp() "llvm.assume"="omp_no_openmp"
; CHECK: [[META9]] = !DISubroutineType(types: [[META2]])
;.
; CHECK-DISABLED: [[META0:![0-9]+]] = distinct !DICompileUnit(language: DW_LANG_C99, file: [[META1:![0-9]+]], producer: "{{.*}}clang version {{.*}}", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: [[META2:![0-9]+]], splitDebugInlining: false, nameTableKind: None)
; CHECK-DISABLED: [[META1]] = !DIFile(filename: "remove_globalization.c", directory: {{.*}})
; CHECK-DISABLED: [[META1]] = !DIFile(filename: "{{.*}}remove_globalization.c", directory: {{.*}})
; CHECK-DISABLED: [[META2]] = !{}
; CHECK-DISABLED: [[META3:![0-9]+]] = !{i32 2, !"Debug Info Version", i32 3}
; CHECK-DISABLED: [[META4:![0-9]+]] = !{i32 1, !"wchar_size", i32 4}
Expand Down
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