derek.holloway
7502bf64a4
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32 lines
2.9 KiB
C
32 lines
2.9 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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// CHECK-SANITIZE-ANYRECOVER: @[[CHAR:.*]] = {{.*}} c"'char *'\00" }
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// CHECK-SANITIZE-ANYRECOVER: @[[ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 30, i32 35 }, {{.*}} @[[CHAR]] }
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void *caller(void) {
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char str[] = "";
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// CHECK: define{{.*}}
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// CHECK-NEXT: entry:
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// CHECK-NEXT: %[[STR:.*]] = alloca [1 x i8], align 1
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// CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 1 %[[STR]], i8 0, i64 1, i1 false)
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// CHECK-NEXT: %[[ARRAYDECAY:.*]] = getelementptr inbounds [1 x i8], ptr %[[STR]], i64 0, i64 0
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// CHECK-SANITIZE-NEXT: %[[PTRINT:.*]] = ptrtoint ptr %[[ARRAYDECAY]] to i64
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// CHECK-SANITIZE-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[PTRINT]], 0
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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 %[[ARRAYDECAY]] to i64, !nosanitize
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// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_alignment_assumption_abort(ptr @[[ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 1, i64 0){{.*}}, !nosanitize
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// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_alignment_assumption(ptr @[[ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 1, 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 %[[ARRAYDECAY]], i64 1) ]
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// CHECK-NEXT: ret ptr %[[ARRAYDECAY]]
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// CHECK-NEXT: }
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return __builtin_assume_aligned(str, 1);
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}
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