[PhaseOrdering] Add test for loop over span with hardened libc++.
Add a slightly reduced test case for a loop iterating over a std::span with libc++ hardening. See https://godbolt.org/z/cKerYq9fY.
This commit is contained in:
Florian Hahn
@@ -0,0 +1,125 @@
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -passes='default<O2>' -S %s | FileCheck %s
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; Slightly reduced test case for a loop iterating over a std::span with libc++ hardening.
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; TODO: The runtime check in the loop should be removed.
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;
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; #include <span>
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; #include <iostream>
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;
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; void use(unsigned&);
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;
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; void fill_with_foreach(std::span<unsigned> elems) {
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; for (unsigned& x : elems)
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; use(x);
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; }
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%"class.std::__1::span" = type { ptr, i64 }
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%"struct.std::__1::__bounded_iter" = type { ptr, ptr, ptr }
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define void @test_fill_with_foreach([2 x i64] %elems.coerce) {
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; CHECK-LABEL: define void @test_fill_with_foreach
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; CHECK-SAME: ([2 x i64] [[ELEMS_COERCE:%.*]]) local_unnamed_addr {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ELEMS_COERCE_FCA_0_EXTRACT:%.*]] = extractvalue [2 x i64] [[ELEMS_COERCE]], 0
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; CHECK-NEXT: [[TMP0:%.*]] = inttoptr i64 [[ELEMS_COERCE_FCA_0_EXTRACT]] to ptr
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; CHECK-NEXT: [[ELEMS_COERCE_FCA_1_EXTRACT:%.*]] = extractvalue [2 x i64] [[ELEMS_COERCE]], 1
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; CHECK-NEXT: [[ADD_PTR_I:%.*]] = getelementptr i32, ptr [[TMP0]], i64 [[ELEMS_COERCE_FCA_1_EXTRACT]]
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; CHECK-NEXT: [[CMP_NOT_I_I_I_I:%.*]] = icmp slt i64 [[ELEMS_COERCE_FCA_1_EXTRACT]], 0
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; CHECK-NEXT: br i1 [[CMP_NOT_I_I_I_I]], label [[ERROR:%.*]], label [[FOR_COND_PREHEADER:%.*]]
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; CHECK: for.cond.preheader:
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; CHECK-NEXT: [[ADD_PTR_I_IDX_MASK:%.*]] = and i64 [[ELEMS_COERCE_FCA_1_EXTRACT]], 4611686018427387903
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; CHECK-NEXT: [[CMP_I_NOT2:%.*]] = icmp eq i64 [[ADD_PTR_I_IDX_MASK]], 0
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; CHECK-NEXT: br i1 [[CMP_I_NOT2]], label [[COMMON_RET:%.*]], label [[FOR_BODY:%.*]]
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; CHECK: common.ret:
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; CHECK-NEXT: ret void
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; CHECK: error:
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; CHECK-NEXT: tail call void @error()
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; CHECK-NEXT: br label [[COMMON_RET]]
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; CHECK: for.body:
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; CHECK-NEXT: [[__BEGIN1_SROA_0_03:%.*]] = phi ptr [ [[INCDEC_PTR_I:%.*]], [[FOR_LATCH:%.*]] ], [ [[TMP0]], [[FOR_COND_PREHEADER]] ]
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; CHECK-NEXT: [[CMP2_I_I:%.*]] = icmp ult ptr [[__BEGIN1_SROA_0_03]], [[ADD_PTR_I]]
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; CHECK-NEXT: br i1 [[CMP2_I_I]], label [[FOR_LATCH]], label [[ERROR]]
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; CHECK: for.latch:
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; CHECK-NEXT: tail call void @use(ptr noundef nonnull align 4 dereferenceable(4) [[__BEGIN1_SROA_0_03]])
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; CHECK-NEXT: [[INCDEC_PTR_I]] = getelementptr inbounds i32, ptr [[__BEGIN1_SROA_0_03]], i64 1
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; CHECK-NEXT: [[CMP_I_NOT:%.*]] = icmp eq ptr [[INCDEC_PTR_I]], [[ADD_PTR_I]]
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; CHECK-NEXT: br i1 [[CMP_I_NOT]], label [[COMMON_RET]], label [[FOR_BODY]]
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;
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entry:
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%elems = alloca %"class.std::__1::span", align 8
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%__begin1 = alloca %"struct.std::__1::__bounded_iter", align 8
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%__end1 = alloca %"struct.std::__1::__bounded_iter", align 8
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%elems.coerce.fca.0.extract = extractvalue [2 x i64] %elems.coerce, 0
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store i64 %elems.coerce.fca.0.extract, ptr %elems, align 8
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%elems.coerce.fca.1.extract = extractvalue [2 x i64] %elems.coerce, 1
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%elems.coerce.fca.1.gep = getelementptr inbounds [2 x i64], ptr %elems, i64 0, i64 1
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store i64 %elems.coerce.fca.1.extract, ptr %elems.coerce.fca.1.gep, align 8
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call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %__begin1) #6
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%0 = load ptr, ptr %elems, align 8
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%__size_.i.i = getelementptr inbounds %"class.std::__1::span", ptr %elems, i64 0, i32 1
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%1 = load i64, ptr %__size_.i.i, align 8
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%add.ptr.i = getelementptr inbounds i32, ptr %0, i64 %1
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store ptr %0, ptr %__begin1, align 8
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%__begin_.i.i.i.i = getelementptr inbounds %"struct.std::__1::__bounded_iter", ptr %__begin1, i64 0, i32 1
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store ptr %0, ptr %__begin_.i.i.i.i, align 8
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%__end_.i.i.i.i = getelementptr inbounds %"struct.std::__1::__bounded_iter", ptr %__begin1, i64 0, i32 2
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store ptr %add.ptr.i, ptr %__end_.i.i.i.i, align 8
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%cmp.not.i.i.i.i = icmp slt i64 %1, 0
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br i1 %cmp.not.i.i.i.i, label %error, label %check.2
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check.2:
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call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %__end1) #6
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%l4 = load ptr, ptr %elems, align 8
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%__size_.i.i4 = getelementptr inbounds %"class.std::__1::span", ptr %elems, i64 0, i32 1
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%l5 = load i64, ptr %__size_.i.i4, align 8
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%add.ptr.i5 = getelementptr inbounds i32, ptr %l4, i64 %l5
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store ptr %add.ptr.i5, ptr %__end1, align 8
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%__begin_.i.i.i.i6 = getelementptr inbounds %"struct.std::__1::__bounded_iter", ptr %__end1, i64 0, i32 1
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store ptr %l4, ptr %__begin_.i.i.i.i6, align 8
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%__end_.i.i.i.i7 = getelementptr inbounds %"struct.std::__1::__bounded_iter", ptr %__end1, i64 0, i32 2
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store ptr %add.ptr.i5, ptr %__end_.i.i.i.i7, align 8
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%cmp.not.i.i.i.i8 = icmp slt i64 %l5, 0
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br i1 %cmp.not.i.i.i.i8, label %error, label %for.cond
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error:
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call void @error()
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ret void
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for.cond:
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%l8 = load ptr, ptr %__begin1, align 8
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%l9 = load ptr, ptr %__end1, align 8
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%cmp.i = icmp ne ptr %l8, %l9
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br i1 %cmp.i, label %for.body, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond
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call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %__end1)
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call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %__begin1)
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ret void
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for.body: ; preds = %for.cond
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%l10 = load ptr, ptr %__begin1, align 8
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%__begin_.i.i = getelementptr inbounds %"struct.std::__1::__bounded_iter", ptr %__begin1, i64 0, i32 1
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%l11 = load ptr, ptr %__begin_.i.i, align 8
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%cmp.not.i.i = icmp uge ptr %l10, %l11
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%__end_.i.i = getelementptr inbounds %"struct.std::__1::__bounded_iter", ptr %__begin1, i64 0, i32 2
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%l12 = load ptr, ptr %__end_.i.i, align 8
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%cmp2.i.i = icmp ult ptr %l10, %l12
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%sel = select i1 %cmp.not.i.i, i1 %cmp2.i.i, i1 false
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br i1 %sel, label %for.latch, label %error
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for.latch:
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call void @use(ptr noundef nonnull align 4 dereferenceable(4) %l10)
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%l = load ptr, ptr %__begin1, align 8
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%incdec.ptr.i = getelementptr inbounds i32, ptr %l, i64 1
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store ptr %incdec.ptr.i, ptr %__begin1, align 8
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br label %for.cond
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}
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declare void @error()
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declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture)
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declare void @use(ptr noundef nonnull align 4 dereferenceable(4))
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declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)
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