forked from OSchip/llvm-project
62 lines
2.8 KiB
C
62 lines
2.8 KiB
C
// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 \
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// RUN: -no-struct-path-tbaa -disable-llvm-passes -o - %s | \
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// RUN: FileCheck %s -check-prefixes=CHECK,SCALAR
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// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 \
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// RUN: -disable-llvm-passes -o - %s | \
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// RUN: FileCheck %s -check-prefixes=CHECK,OLD-PATH
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// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 \
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// RUN: -new-struct-path-tbaa -disable-llvm-passes -o - %s | \
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// RUN: FileCheck %s -check-prefixes=CHECK,NEW-PATH
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// Types with the may_alias attribute should be considered equivalent
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// to char for aliasing.
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typedef int __attribute__((may_alias)) aliasing_int;
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void test0(aliasing_int *ai, int *i) {
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// CHECK-LABEL: test0
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// CHECK: store i32 0, {{.*}}, !tbaa [[TAG_alias_int:!.*]]
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*ai = 0;
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// CHECK: store i32 1, {{.*}}, !tbaa [[TAG_int:!.*]]
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*i = 1;
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}
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// PR9307
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struct Test1 { int x; };
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struct Test1MA { int x; } __attribute__((may_alias));
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void test1(struct Test1MA *p1, struct Test1 *p2) {
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// CHECK-LABEL: test1
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// CHECK: store i32 2, {{.*}}, !tbaa [[TAG_alias_test1_x:!.*]]
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p1->x = 2;
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// CHECK: store i32 3, {{.*}}, !tbaa [[TAG_test1_x:!.*]]
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p2->x = 3;
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}
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// SCALAR-DAG: [[ROOT:!.*]] = !{!"Simple C/C++ TBAA"}
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// SCALAR-DAG: [[TYPE_char:!.*]] = !{!"omnipotent char", [[ROOT]], i64 0}
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// SCALAR-DAG: [[TAG_alias_int]] = !{[[TYPE_char]], [[TYPE_char]], i64 0}
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// SCALAR-DAG: [[TAG_alias_test1_x]] = !{[[TYPE_char]], [[TYPE_char]], i64 0}
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// SCALAR-DAG: [[TYPE_int:!.*]] = !{!"int", [[TYPE_char]], i64 0}
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// SCALAR-DAG: [[TAG_int]] = !{[[TYPE_int]], [[TYPE_int]], i64 0}
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// SCALAR-DAG: [[TAG_test1_x]] = !{[[TYPE_int]], [[TYPE_int]], i64 0}
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// OLD-PATH-DAG: [[ROOT:!.*]] = !{!"Simple C/C++ TBAA"}
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// OLD-PATH-DAG: [[TYPE_char:!.*]] = !{!"omnipotent char", [[ROOT]], i64 0}
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// OLD-PATH-DAG: [[TAG_alias_int]] = !{[[TYPE_char]], [[TYPE_char]], i64 0}
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// OLD-PATH-DAG: [[TAG_alias_test1_x]] = !{[[TYPE_char]], [[TYPE_char]], i64 0}
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// OLD-PATH-DAG: [[TYPE_int:!.*]] = !{!"int", [[TYPE_char]], i64 0}
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// OLD-PATH-DAG: [[TAG_int]] = !{[[TYPE_int]], [[TYPE_int]], i64 0}
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// OLD-PATH-DAG: [[TYPE_test1:!.*]] = !{!"Test1", [[TYPE_int]], i64 0}
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// OLD-PATH-DAG: [[TAG_test1_x]] = !{[[TYPE_test1]], [[TYPE_int]], i64 0}
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// NEW-PATH-DAG: [[ROOT:!.*]] = !{!"Simple C/C++ TBAA"}
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// NEW-PATH-DAG: [[TYPE_char:!.*]] = !{[[ROOT]], i64 1, !"omnipotent char"}
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// NEW-PATH-DAG: [[TAG_alias_int]] = !{[[TYPE_char]], [[TYPE_char]], i64 0, i64 0}
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// NEW-PATH-DAG: [[TAG_alias_test1_x]] = !{[[TYPE_char]], [[TYPE_char]], i64 0, i64 0}
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// NEW-PATH-DAG: [[TYPE_int:!.*]] = !{[[TYPE_char]], i64 4, !"int"}
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// NEW-PATH-DAG: [[TAG_int]] = !{[[TYPE_int]], [[TYPE_int]], i64 0, i64 4}
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// NEW-PATH-DAG: [[TYPE_test1:!.*]] = !{[[TYPE_char]], i64 4, !"Test1", [[TYPE_int]], i64 0, i64 4}
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// NEW-PATH-DAG: [[TAG_test1_x]] = !{[[TYPE_test1]], [[TYPE_int]], i64 0, i64 4}
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