derek.holloway
7502bf64a4
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41 lines
3.4 KiB
C++
41 lines
3.4 KiB
C++
// RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
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// RUN: %clang_cc1 -fsanitize=alignment -fno-sanitize-recover=alignment -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_alignment_assumption" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-NORECOVER,CHECK-SANITIZE-UNREACHABLE
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// RUN: %clang_cc1 -fsanitize=alignment -fsanitize-recover=alignment -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_alignment_assumption" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-RECOVER
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// RUN: %clang_cc1 -fsanitize=alignment -fsanitize-trap=alignment -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_alignment_assumption" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-TRAP,CHECK-SANITIZE-UNREACHABLE
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typedef char **__attribute__((align_value(0x100000000))) aligned_char;
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struct ac_struct {
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// CHECK: %[[STRUCT_AC_STRUCT:.*]] = type { ptr }
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aligned_char a;
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};
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// CHECK-SANITIZE-ANYRECOVER: @[[ALIGNED_CHAR:.*]] = {{.*}} c"'aligned_char' (aka 'char **')\00" }
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// CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 13 }, {{.*}} @[[ALIGNED_CHAR]] }
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char **load_from_ac_struct(struct ac_struct *x) {
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// CHECK: define{{.*}} ptr @{{.*}}(ptr noundef %[[X:.*]])
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// CHECK-NEXT: [[ENTRY:.*]]:
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// CHECK-NEXT: %[[STRUCT_AC_STRUCT_ADDR:.*]] = alloca ptr, align 8
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// CHECK-NEXT: store ptr %[[X]], ptr %[[STRUCT_AC_STRUCT_ADDR]], align 8
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// CHECK-NEXT: %[[X_RELOADED:.*]] = load ptr, ptr %[[STRUCT_AC_STRUCT_ADDR]], align 8
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// CHECK: %[[A_ADDR:.*]] = getelementptr inbounds nuw %[[STRUCT_AC_STRUCT]], ptr %[[X_RELOADED]], i32 0, i32 0
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// CHECK: %[[A:.*]] = load ptr, ptr %[[A_ADDR]], align 8
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// CHECK-SANITIZE-NEXT: %[[PTRINT:.*]] = ptrtoint ptr %[[A]] to i64
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// CHECK-SANITIZE-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[PTRINT]], 4294967295
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// CHECK-SANITIZE-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0
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// CHECK-SANITIZE-NEXT: br i1 %[[MASKCOND]], label %[[CONT:.*]], label %[[HANDLER_ALIGNMENT_ASSUMPTION:[^,]+]],{{.*}} !nosanitize
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// CHECK-SANITIZE: [[HANDLER_ALIGNMENT_ASSUMPTION]]:
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// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint ptr %[[A]] to i64, !nosanitize
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// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_alignment_assumption_abort(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 4294967296, i64 0){{.*}}, !nosanitize
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// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_alignment_assumption(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 4294967296, i64 0){{.*}}, !nosanitize
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// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 23){{.*}}, !nosanitize
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// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
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// CHECK-SANITIZE: [[CONT]]:
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// CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr %[[A]], i64 4294967296) ]
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// CHECK-NEXT: ret ptr %[[A]]
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// CHECK-NEXT: }
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#line 100
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return x->a;
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}
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