derek.holloway
7502bf64a4
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45 lines
3.6 KiB
C++
45 lines
3.6 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: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 10 }, {{.*}} @[[CHAR]] }
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char **__attribute__((assume_aligned(0x100000000, 42))) passthrough(char **x) {
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// CHECK: define{{.*}} ptr @[[PASSTHROUGH:.*]](ptr noundef %[[X:.*]])
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// CHECK-NEXT: entry:
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// CHECK-NEXT: %[[X_ADDR:.*]] = alloca ptr, align 8
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// CHECK-NEXT: store ptr %[[X]], ptr %[[X_ADDR]], align 8
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// CHECK-NEXT: %[[X_RELOADED:.*]] = load ptr, ptr %[[X_ADDR]], align 8
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// CHECK-NEXT: ret ptr %[[X_RELOADED]]
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// CHECK-NEXT: }
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return x;
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}
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char **caller(char **x) {
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// CHECK: define{{.*}} ptr @{{.*}}(ptr noundef %[[X:.*]])
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// CHECK-NEXT: entry:
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// CHECK-NEXT: %[[X_ADDR:.*]] = alloca ptr, align 8
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// CHECK-NEXT: store ptr %[[X]], ptr %[[X_ADDR]], align 8
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// CHECK-NEXT: %[[X_RELOADED:.*]] = load ptr, ptr %[[X_ADDR]], align 8
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// CHECK-NEXT: %[[X_RETURNED:.*]] = call noundef ptr @[[PASSTHROUGH]](ptr noundef %[[X_RELOADED]])
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// CHECK-SANITIZE-NEXT: %[[PTRINT:.*]] = ptrtoint ptr %[[X_RETURNED]] to i64
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// CHECK-SANITIZE-NEXT: %[[OFFSETPTR:.*]] = sub i64 %[[PTRINT]], 42
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// CHECK-SANITIZE-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[OFFSETPTR]], 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 %[[X_RETURNED]] 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 42){{.*}}, !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 42){{.*}}, !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 %[[X_RETURNED]], i64 4294967296, i64 42) ]
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// CHECK-NEXT: ret ptr %[[X_RETURNED]]
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// CHECK-NEXT: }
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#line 100
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return passthrough(x);
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}
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