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llvm-project/clang/test/CodeGenCXX/for-range.cpp
Nikita Popov b3d99ac2cd [CodeGen] Use data layout aware constant folder in CGBuilder (#184819) 
Use the DataLayout-aware TargetFolder instead of ConstantFolder in
Clang's CGBuilder. The primary impact of this change is that GEP
constant expressions are now emitted in canonical `getelementptr i8`
form. This is in preparation for the migration to ptradd, which requires
this form.

Part of the test updates were performed by Claude Code and reviewed by
me.
2026-03-06 08:33:34 +00:00

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// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++11 -emit-llvm -o - %s | FileCheck %s
struct A {
A();
A(const A&);
~A();
};
struct B {
B();
B(const B&);
~B();
};
struct C {
C();
C(const C&);
~C();
};
struct D {
D();
D(const D&);
~D();
B *begin();
B *end();
};
B *begin(C&);
B *end(C&);
extern B array[5];
// CHECK-LABEL: @_Z9for_arrayv(
// CHECK-NEXT: entry:
// CHECK-NEXT: [[A:%.*]] = alloca [[STRUCT_A:%.*]], align 1
// CHECK-NEXT: [[__RANGE1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[__BEGIN1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[__END1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[B:%.*]] = alloca [[STRUCT_B:%.*]], align 1
// CHECK-NEXT: call void @_ZN1AC1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]])
// CHECK-NEXT: store ptr @array, ptr [[__RANGE1]], align 8
// CHECK-NEXT: store ptr @array, ptr [[__BEGIN1]], align 8
// CHECK-NEXT: store ptr getelementptr inbounds nuw (i8, ptr @array, i64 5), ptr [[__END1]], align 8
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[__END1]], align 8
// CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
// CHECK-NEXT: call void @_ZN1BC1ERKS_(ptr noundef nonnull align 1 dereferenceable(1) [[B]], ptr noundef nonnull align 1 dereferenceable(1) [[TMP2]])
// CHECK-NEXT: call void @_ZN1BD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[B]]) #[[ATTR3:[0-9]+]]
// CHECK-NEXT: br label [[FOR_INC:%.*]]
// CHECK: for.inc:
// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
// CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds nuw [[STRUCT_B]], ptr [[TMP3]], i32 1
// CHECK-NEXT: store ptr [[INCDEC_PTR]], ptr [[__BEGIN1]], align 8
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: call void @_ZN1AD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]]) #[[ATTR3]]
// CHECK-NEXT: ret void
//
void for_array() {
A a;
for (B b : array) {
}
}
// CHECK-LABEL: @_Z9for_rangev(
// CHECK-NEXT: entry:
// CHECK-NEXT: [[A:%.*]] = alloca [[STRUCT_A:%.*]], align 1
// CHECK-NEXT: [[__RANGE1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_C:%.*]], align 1
// CHECK-NEXT: [[__BEGIN1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[__END1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[B:%.*]] = alloca [[STRUCT_B:%.*]], align 1
// CHECK-NEXT: call void @_ZN1AC1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]])
// CHECK-NEXT: call void @_ZN1CC1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[REF_TMP]])
// CHECK-NEXT: store ptr [[REF_TMP]], ptr [[__RANGE1]], align 8
// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[__RANGE1]], align 8, !nonnull [[META2:![0-9]+]]
// CHECK-NEXT: [[CALL:%.*]] = call noundef ptr @_Z5beginR1C(ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]])
// CHECK-NEXT: store ptr [[CALL]], ptr [[__BEGIN1]], align 8
// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[__RANGE1]], align 8, !nonnull [[META2]]
// CHECK-NEXT: [[CALL1:%.*]] = call noundef ptr @_Z3endR1C(ptr noundef nonnull align 1 dereferenceable(1) [[TMP1]])
// CHECK-NEXT: store ptr [[CALL1]], ptr [[__END1]], align 8
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[__END1]], align 8
// CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[TMP2]], [[TMP3]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_COND_CLEANUP:%.*]]
// CHECK: for.cond.cleanup:
// CHECK-NEXT: call void @_ZN1CD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[REF_TMP]]) #[[ATTR3]]
// CHECK-NEXT: br label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: [[TMP4:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
// CHECK-NEXT: call void @_ZN1BC1ERKS_(ptr noundef nonnull align 1 dereferenceable(1) [[B]], ptr noundef nonnull align 1 dereferenceable(1) [[TMP4]])
// CHECK-NEXT: call void @_ZN1BD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[B]]) #[[ATTR3]]
// CHECK-NEXT: br label [[FOR_INC:%.*]]
// CHECK: for.inc:
// CHECK-NEXT: [[TMP5:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
// CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds nuw [[STRUCT_B]], ptr [[TMP5]], i32 1
// CHECK-NEXT: store ptr [[INCDEC_PTR]], ptr [[__BEGIN1]], align 8
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: call void @_ZN1AD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]]) #[[ATTR3]]
// CHECK-NEXT: ret void
//
void for_range() {
A a;
for (B b : C()) {
}
}
// CHECK-LABEL: @_Z16for_member_rangev(
// CHECK-NEXT: entry:
// CHECK-NEXT: [[A:%.*]] = alloca [[STRUCT_A:%.*]], align 1
// CHECK-NEXT: [[__RANGE1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_D:%.*]], align 1
// CHECK-NEXT: [[__BEGIN1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[__END1:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[B:%.*]] = alloca [[STRUCT_B:%.*]], align 1
// CHECK-NEXT: call void @_ZN1AC1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]])
// CHECK-NEXT: call void @_ZN1DC1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[REF_TMP]])
// CHECK-NEXT: store ptr [[REF_TMP]], ptr [[__RANGE1]], align 8
// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[__RANGE1]], align 8, !nonnull [[META2]]
// CHECK-NEXT: [[CALL:%.*]] = call noundef ptr @_ZN1D5beginEv(ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]])
// CHECK-NEXT: store ptr [[CALL]], ptr [[__BEGIN1]], align 8
// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[__RANGE1]], align 8, !nonnull [[META2]]
// CHECK-NEXT: [[CALL1:%.*]] = call noundef ptr @_ZN1D3endEv(ptr noundef nonnull align 1 dereferenceable(1) [[TMP1]])
// CHECK-NEXT: store ptr [[CALL1]], ptr [[__END1]], align 8
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[__END1]], align 8
// CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[TMP2]], [[TMP3]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_COND_CLEANUP:%.*]]
// CHECK: for.cond.cleanup:
// CHECK-NEXT: call void @_ZN1DD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[REF_TMP]]) #[[ATTR3]]
// CHECK-NEXT: br label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: [[TMP4:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
// CHECK-NEXT: call void @_ZN1BC1ERKS_(ptr noundef nonnull align 1 dereferenceable(1) [[B]], ptr noundef nonnull align 1 dereferenceable(1) [[TMP4]])
// CHECK-NEXT: call void @_ZN1BD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[B]]) #[[ATTR3]]
// CHECK-NEXT: br label [[FOR_INC:%.*]]
// CHECK: for.inc:
// CHECK-NEXT: [[TMP5:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
// CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds nuw [[STRUCT_B]], ptr [[TMP5]], i32 1
// CHECK-NEXT: store ptr [[INCDEC_PTR]], ptr [[__BEGIN1]], align 8
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: call void @_ZN1AD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]]) #[[ATTR3]]
// CHECK-NEXT: ret void
//
void for_member_range() {
A a;
for (B b : D()) {
}
}
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