clang/test/CodeGen/catch-alignment-assumption-attribute-align_value-on-paramvar.cpp

   1 // RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-NOSANITIZE
   2 // 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
   3 // 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
   4 // 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
   5
   6 // CHECK-SANITIZE-ANYRECOVER: @[[CHAR:.*]] = {{.*}} c"'char **'\00" }
   7 // CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 10 }, {{.*}} @[[CHAR]] }
   8
   9 char **passthrough(__attribute__((align_value(0x100000000))) char **x) {
  10   // CHECK-NOSANITIZE:                define{{.*}} ptr @{{.*}}(ptr noundef align 4294967296 %[[X:.*]])
  11   // CHECK-SANITIZE:                  define{{.*}} ptr @{{.*}}(ptr noundef %[[X:.*]])
  12   // CHECK-NEXT:                      [[entry:.*]]:
  13   // CHECK-NEXT:                        %[[X_ADDR:.*]] = alloca ptr, align 8
  14   // CHECK-NEXT:                        store ptr %[[X]], ptr %[[X_ADDR]], align 8
  15   // CHECK-NEXT:                        %[[X_RELOADED:.*]] = load ptr, ptr %[[X_ADDR]], align 8
  16   // CHECK-SANITIZE-NEXT:               %[[PTRINT:.*]] = ptrtoint ptr %[[X_RELOADED]] to i64
  17   // CHECK-SANITIZE-NEXT:               %[[MASKEDPTR:.*]] = and i64 %[[PTRINT]], 4294967295
  18   // CHECK-SANITIZE-NEXT:               %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0
  19   // CHECK-SANITIZE-NEXT:               %[[PTRINT_DUP:.*]] = ptrtoint ptr %[[X_RELOADED]] to i64, !nosanitize
  20   // CHECK-SANITIZE-NEXT:               br i1 %[[MASKCOND]], label %[[CONT:.*]], label %[[HANDLER_ALIGNMENT_ASSUMPTION:[^,]+]],{{.*}} !nosanitize
  21   // CHECK-SANITIZE:                  [[HANDLER_ALIGNMENT_ASSUMPTION]]:
  22   // CHECK-SANITIZE-NORECOVER-NEXT:     call void @__ubsan_handle_alignment_assumption_abort(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 4294967296, i64 0){{.*}}, !nosanitize
  23   // CHECK-SANITIZE-RECOVER-NEXT:       call void @__ubsan_handle_alignment_assumption(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 4294967296, i64 0){{.*}}, !nosanitize
  24   // CHECK-SANITIZE-TRAP-NEXT:          call void @llvm.ubsantrap(i8 23){{.*}}, !nosanitize
  25   // CHECK-SANITIZE-UNREACHABLE-NEXT:   unreachable, !nosanitize
  26   // CHECK-SANITIZE:                  [[CONT]]:
  27   // CHECK-SANITIZE-NEXT:               call void @llvm.assume(i1 true) [ "align"(ptr %[[X_RELOADED]], i64 4294967296) ]
  28   // CHECK-NEXT:                        ret ptr %[[X_RELOADED]]
  29   // CHECK-NEXT:                      }
  30 #line 100
  31   return x;
  32 }