c0480738cb
This patch turns off inbounds/nuw flags for member accesses when `-fwrapv-pointer` is set. Closes https://github.com/llvm/llvm-project/issues/132449. It is required by https://github.com/llvm/llvm-project/pull/130734.
34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - | FileCheck %s --check-prefix=DEFAULT
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// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - -fwrapv | FileCheck %s --check-prefix=DEFAULT
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// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - -ftrapv | FileCheck %s --check-prefix=DEFAULT
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// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - -fwrapv-pointer | FileCheck %s --check-prefix=FWRAPV-POINTER
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void test(void) {
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// -fwrapv-pointer should turn off inbounds for GEP's
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extern int* P;
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++P;
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// DEFAULT: getelementptr inbounds nuw i32, ptr
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// FWRAPV-POINTER: getelementptr i32, ptr
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}
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struct S {
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int a;
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int b;
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int c: 10;
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int d: 10;
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};
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int test_struct(struct S* s) {
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// -fwrapv-pointer should turn off inbounds nuw for struct GEP's
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return s->b;
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// DEFAULT: getelementptr inbounds nuw %struct.S, ptr
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// FWRAPV-POINTER: getelementptr %struct.S, ptr
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}
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int test_struct_bitfield(struct S* s) {
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// -fwrapv-pointer should turn off inbounds nuw for struct GEP's
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return s->d;
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// DEFAULT: getelementptr inbounds nuw %struct.S, ptr
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// FWRAPV-POINTER: getelementptr %struct.S, ptr
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}
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