/* { dg-do compile } */ /* { dg-options "-O2 -fdump-tree-optimized" } */ char *my_alloc1 (int len) __attribute__((__assume_aligned__ (32))); char *my_alloc2 (int len) __attribute__((assume_aligned (32, 4))); int test1 (int len) { int i; char *p = my_alloc1 (len); return ((__INTPTR_TYPE__) p) & 31; } int test2 (int len) { int i; char *p = my_alloc2 (len); return (((__INTPTR_TYPE__) p) & 31) != 4; } /* { dg-final { scan-tree-dump-times "return 0" 2 "optimized" } } */ /* { dg-final { cleanup-tree-dump "optimized" } } */
// RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-NOSANITIZE // 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 // 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 // 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 // CHECK-SANITIZE-ANYRECOVER: @[[CHAR:.*]] = {{.*}} c"'char **'\00" } // CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 10 }, {{.*}}* @[[CHAR]] } char **__attribute__((assume_aligned(0x80000000, 42))) passthrough(char **x) { // CHECK: define i8** @[[PASSTHROUGH:.*]](i8** %[[X:.*]]) // CHECK-NEXT: entry: // CHECK-NEXT: %[[X_ADDR:.*]] = alloca i8**, align 8 // CHECK-NEXT: store i8** %[[X]], i8*** %[[X_ADDR]], align 8 // CHECK-NEXT: %[[X_RELOADED:.*]] = load i8**, i8*** %[[X_ADDR]], align 8 // CHECK-NEXT: ret i8** %[[X_RELOADED]] // CHECK-NEXT: } return x; } char **caller(char **x) { // CHECK: define i8** @{{.*}}(i8** %[[X:.*]]) // CHECK-NEXT: entry: // CHECK-NEXT: %[[X_ADDR:.*]] = alloca i8**, align 8 // CHECK-NEXT: store i8** %[[X]], i8*** %[[X_ADDR]], align 8 // CHECK-NEXT: %[[X_RELOADED:.*]] = load i8**, i8*** %[[X_ADDR]], align 8 // CHECK-NEXT: %[[X_RETURNED:.*]] = call i8** @[[PASSTHROUGH]](i8** %[[X_RELOADED]]) // CHECK-NEXT: %[[PTRINT:.*]] = ptrtoint i8** %[[X_RETURNED]] to i64 // CHECK-NEXT: %[[OFFSETPTR:.*]] = sub i64 %[[PTRINT]], 42 // CHECK-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[OFFSETPTR]], 2147483647 // CHECK-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0 // CHECK-SANITIZE-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint i8** %[[X_RETURNED]] to i64, !nosanitize