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7eca38ce76
Add nuw attribute to inbounds GEPs where the expression used to form the GEP is an addition of unsigned indices. Relands #105496, which was reverted because it exposed a miscompilation arising from #98608. This is now fixed by #106512.
164 lines
7.5 KiB
C++
164 lines
7.5 KiB
C++
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++11 -emit-llvm -o - %s | FileCheck %s
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struct A {
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A();
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A(const A&);
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~A();
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};
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struct B {
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B();
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B(const B&);
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~B();
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};
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struct C {
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C();
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C(const C&);
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~C();
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};
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struct D {
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D();
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D(const D&);
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~D();
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B *begin();
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B *end();
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};
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B *begin(C&);
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B *end(C&);
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extern B array[5];
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// CHECK-LABEL: @_Z9for_arrayv(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[A:%.*]] = alloca [[STRUCT_A:%.*]], align 1
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// CHECK-NEXT: [[__RANGE1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[__BEGIN1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[__END1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[B:%.*]] = alloca [[STRUCT_B:%.*]], align 1
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// CHECK-NEXT: call void @_ZN1AC1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]])
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// CHECK-NEXT: store ptr @array, ptr [[__RANGE1]], align 8
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// CHECK-NEXT: store ptr @array, ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: store ptr getelementptr inbounds ([[STRUCT_B]], ptr @array, i64 5), ptr [[__END1]], align 8
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// CHECK-NEXT: br label [[FOR_COND:%.*]]
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// CHECK: for.cond:
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[__END1]], align 8
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// CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[TMP0]], [[TMP1]]
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// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
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// CHECK: for.body:
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// CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: call void @_ZN1BC1ERKS_(ptr noundef nonnull align 1 dereferenceable(1) [[B]], ptr noundef nonnull align 1 dereferenceable(1) [[TMP2]])
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// CHECK-NEXT: call void @_ZN1BD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[B]]) #[[ATTR3:[0-9]+]]
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// CHECK-NEXT: br label [[FOR_INC:%.*]]
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// CHECK: for.inc:
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// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds nuw [[STRUCT_B]], ptr [[TMP3]], i32 1
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// CHECK-NEXT: store ptr [[INCDEC_PTR]], ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: br label [[FOR_COND]]
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// CHECK: for.end:
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// CHECK-NEXT: call void @_ZN1AD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]]) #[[ATTR3]]
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// CHECK-NEXT: ret void
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//
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void for_array() {
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A a;
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for (B b : array) {
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}
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}
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// CHECK-LABEL: @_Z9for_rangev(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[A:%.*]] = alloca [[STRUCT_A:%.*]], align 1
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// CHECK-NEXT: [[__RANGE1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_C:%.*]], align 1
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// CHECK-NEXT: [[__BEGIN1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[__END1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[B:%.*]] = alloca [[STRUCT_B:%.*]], align 1
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// CHECK-NEXT: call void @_ZN1AC1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]])
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// CHECK-NEXT: call void @_ZN1CC1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[REF_TMP]])
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// CHECK-NEXT: store ptr [[REF_TMP]], ptr [[__RANGE1]], align 8
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[__RANGE1]], align 8
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// CHECK-NEXT: [[CALL:%.*]] = call noundef ptr @_Z5beginR1C(ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]])
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// CHECK-NEXT: store ptr [[CALL]], ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[__RANGE1]], align 8
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// CHECK-NEXT: [[CALL1:%.*]] = call noundef ptr @_Z3endR1C(ptr noundef nonnull align 1 dereferenceable(1) [[TMP1]])
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// CHECK-NEXT: store ptr [[CALL1]], ptr [[__END1]], align 8
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// CHECK-NEXT: br label [[FOR_COND:%.*]]
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// CHECK: for.cond:
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// CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[__END1]], align 8
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// CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[TMP2]], [[TMP3]]
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// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_COND_CLEANUP:%.*]]
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// CHECK: for.cond.cleanup:
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// CHECK-NEXT: call void @_ZN1CD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[REF_TMP]]) #[[ATTR3]]
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// CHECK-NEXT: br label [[FOR_END:%.*]]
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// CHECK: for.body:
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// CHECK-NEXT: [[TMP4:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: call void @_ZN1BC1ERKS_(ptr noundef nonnull align 1 dereferenceable(1) [[B]], ptr noundef nonnull align 1 dereferenceable(1) [[TMP4]])
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// CHECK-NEXT: call void @_ZN1BD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[B]]) #[[ATTR3]]
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// CHECK-NEXT: br label [[FOR_INC:%.*]]
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// CHECK: for.inc:
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// CHECK-NEXT: [[TMP5:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds nuw [[STRUCT_B]], ptr [[TMP5]], i32 1
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// CHECK-NEXT: store ptr [[INCDEC_PTR]], ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: br label [[FOR_COND]]
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// CHECK: for.end:
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// CHECK-NEXT: call void @_ZN1AD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]]) #[[ATTR3]]
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// CHECK-NEXT: ret void
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//
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void for_range() {
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A a;
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for (B b : C()) {
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}
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}
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// CHECK-LABEL: @_Z16for_member_rangev(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[A:%.*]] = alloca [[STRUCT_A:%.*]], align 1
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// CHECK-NEXT: [[__RANGE1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_D:%.*]], align 1
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// CHECK-NEXT: [[__BEGIN1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[__END1:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[B:%.*]] = alloca [[STRUCT_B:%.*]], align 1
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// CHECK-NEXT: call void @_ZN1AC1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]])
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// CHECK-NEXT: call void @_ZN1DC1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[REF_TMP]])
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// CHECK-NEXT: store ptr [[REF_TMP]], ptr [[__RANGE1]], align 8
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[__RANGE1]], align 8
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// CHECK-NEXT: [[CALL:%.*]] = call noundef ptr @_ZN1D5beginEv(ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]])
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// CHECK-NEXT: store ptr [[CALL]], ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[__RANGE1]], align 8
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// CHECK-NEXT: [[CALL1:%.*]] = call noundef ptr @_ZN1D3endEv(ptr noundef nonnull align 1 dereferenceable(1) [[TMP1]])
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// CHECK-NEXT: store ptr [[CALL1]], ptr [[__END1]], align 8
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// CHECK-NEXT: br label [[FOR_COND:%.*]]
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// CHECK: for.cond:
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// CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[__END1]], align 8
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// CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[TMP2]], [[TMP3]]
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// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_COND_CLEANUP:%.*]]
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// CHECK: for.cond.cleanup:
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// CHECK-NEXT: call void @_ZN1DD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[REF_TMP]]) #[[ATTR3]]
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// CHECK-NEXT: br label [[FOR_END:%.*]]
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// CHECK: for.body:
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// CHECK-NEXT: [[TMP4:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: call void @_ZN1BC1ERKS_(ptr noundef nonnull align 1 dereferenceable(1) [[B]], ptr noundef nonnull align 1 dereferenceable(1) [[TMP4]])
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// CHECK-NEXT: call void @_ZN1BD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[B]]) #[[ATTR3]]
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// CHECK-NEXT: br label [[FOR_INC:%.*]]
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// CHECK: for.inc:
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// CHECK-NEXT: [[TMP5:%.*]] = load ptr, ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds nuw [[STRUCT_B]], ptr [[TMP5]], i32 1
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// CHECK-NEXT: store ptr [[INCDEC_PTR]], ptr [[__BEGIN1]], align 8
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// CHECK-NEXT: br label [[FOR_COND]]
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// CHECK: for.end:
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// CHECK-NEXT: call void @_ZN1AD1Ev(ptr noundef nonnull align 1 dereferenceable(1) [[A]]) #[[ATTR3]]
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// CHECK-NEXT: ret void
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//
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void for_member_range() {
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A a;
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for (B b : D()) {
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}
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}
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