derek.holloway
7502bf64a4
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76 lines
3.1 KiB
C
76 lines
3.1 KiB
C
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o %t.cir
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// RUN: FileCheck --input-file=%t.cir %s -check-prefix=CIR
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-llvm %s -o %t-cir.ll
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// RUN: FileCheck --input-file=%t-cir.ll %s -check-prefix=LLVM
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm %s -o %t.ll
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// RUN: FileCheck --input-file=%t.ll %s -check-prefix=OGCG
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// Test pointer arithmetic on VLA types.
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void test_vla_ptr_add(int n, int i) {
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int arr[n];
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int (*p)[n] = &arr;
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p = p + i;
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}
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// CIR-LABEL: @test_vla_ptr_add
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// CIR: cir.alloca {{.*}} ["arr"]
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// CIR: %[[N2:.*]] = cir.load{{.*}} !cir.ptr<!s32i>, !s32i
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// CIR: %[[VLA_SIZE:.*]] = cir.cast integral %[[N2]] : !s32i -> !u64i
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// CIR: %[[P:.*]] = cir.load{{.*}} !cir.ptr<!cir.ptr<!s32i>>, !cir.ptr<!s32i>
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// CIR: %[[I:.*]] = cir.load{{.*}} !cir.ptr<!s32i>, !s32i
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// CIR: %[[I_EXT:.*]] = cir.cast integral %[[I]] : !s32i -> !u64i
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// CIR: %[[SCALED:.*]] = cir.mul nsw %[[I_EXT]], %[[VLA_SIZE]] : !u64i
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// CIR: cir.ptr_stride %[[P]], %[[SCALED]] : (!cir.ptr<!s32i>, !u64i) -> !cir.ptr<!s32i>
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// LLVM-LABEL: @test_vla_ptr_add
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// LLVM: %[[SCALED:.*]] = mul nsw i64 %{{.*}}, %{{.*}}
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// LLVM: getelementptr i32, ptr %{{.*}}, i64 %[[SCALED]]
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// OGCG-LABEL: @test_vla_ptr_add
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// OGCG: %[[IDX:.*]] = mul nsw i64 %{{.*}}, %{{.*}}
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// OGCG: getelementptr inbounds i32, ptr %{{.*}}, i64 %[[IDX]]
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void test_vla_ptr_inc(int n) {
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int arr[n];
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int (*p)[n] = &arr;
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p++;
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}
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// CIR-LABEL: @test_vla_ptr_inc
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// CIR: cir.alloca {{.*}} ["arr"]
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// CIR: %[[N2:.*]] = cir.load{{.*}} !cir.ptr<!s32i>, !s32i
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// CIR: %[[VLA_SIZE:.*]] = cir.cast integral %[[N2]] : !s32i -> !u64i
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// CIR: %[[P:.*]] = cir.load{{.*}} !cir.ptr<!cir.ptr<!s32i>>, !cir.ptr<!s32i>
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// CIR: cir.ptr_stride %[[P]], %[[VLA_SIZE]] : (!cir.ptr<!s32i>, !u64i) -> !cir.ptr<!s32i>
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// LLVM-LABEL: @test_vla_ptr_inc
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// LLVM: getelementptr i32, ptr %{{.*}}, i64 %{{.*}}
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// OGCG-LABEL: @test_vla_ptr_inc
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// OGCG: getelementptr inbounds nuw i32, ptr %{{.*}}, i64 %{{.*}}
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void test_vla_ptr_dec(int n) {
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int arr[n];
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int (*p)[n] = &arr;
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p--;
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}
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// CIR-LABEL: @test_vla_ptr_dec
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// CIR: cir.alloca {{.*}} ["arr"]
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// CIR: %[[N2:.*]] = cir.load{{.*}} !cir.ptr<!s32i>, !s32i
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// CIR: %[[VLA_SIZE:.*]] = cir.cast integral %[[N2]] : !s32i -> !u64i
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// CIR: %[[P:.*]] = cir.load{{.*}} !cir.ptr<!cir.ptr<!s32i>>, !cir.ptr<!s32i>
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// CIR: %[[SIGNED:.*]] = cir.cast integral %[[VLA_SIZE]] : !u64i -> !s64i
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// CIR: %[[NEG:.*]] = cir.minus nsw %[[SIGNED]] : !s64i
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// CIR: cir.ptr_stride %[[P]], %[[NEG]] : (!cir.ptr<!s32i>, !s64i) -> !cir.ptr<!s32i>
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// LLVM-LABEL: @test_vla_ptr_dec
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// LLVM: %[[NEG:.*]] = sub nsw i64 0, %{{.*}}
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// LLVM: getelementptr i32, ptr %{{.*}}, i64 %[[NEG]]
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// OGCG-LABEL: @test_vla_ptr_dec
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// OGCG: %[[NEG:.*]] = sub nsw i64 0, %{{.*}}
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// OGCG: getelementptr inbounds i32, ptr %{{.*}}, i64 %[[NEG]]
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