/// Check the code generation for the alignment builtins /// To make the test case easier to read, run SROA after generating IR to remove the alloca instructions. // RUN: %clang_cc1 -triple=x86_64-unknown-unknown -DTEST_VOID_PTR \ // RUN: -o - -emit-llvm %s -disable-O0-optnone | opt -S -sroa | \ // RUN: FileCheck %s -check-prefixes CHECK,POINTER,ALIGNMENT_EXT \ // RUN: -enable-var-scope '-D$PTRTYPE=i8' // RUN: %clang_cc1 -triple=x86_64-unknown-unknown -DTEST_FLOAT_PTR \ // RUN: -o - -emit-llvm %s -disable-O0-optnone | opt -S -sroa | \ // RUN: FileCheck %s -check-prefixes CHECK,POINTER,NON_I8_POINTER,ALIGNMENT_EXT \ // RUN: -enable-var-scope '-D$PTRTYPE=f32' // RUN: %clang_cc1 -triple=x86_64-unknown-unknown -DTEST_LONG \ // RUN: -o - -emit-llvm %s -disable-O0-optnone | opt -S -sroa | \ // RUN: FileCheck %s -check-prefixes CHECK,INTEGER,ALIGNMENT_EXT -enable-var-scope /// Check that we can handle the case where the alignment parameter is wider /// than the source type (generate a trunc on alignment instead of zext) // RUN: %clang_cc1 -triple=x86_64-unknown-unknown -DTEST_USHORT \ // RUN: -o - -emit-llvm %s -disable-O0-optnone | opt -S -sroa | \ // RUN: FileCheck %s -check-prefixes CHECK,INTEGER,ALIGNMENT_TRUNC -enable-var-scope #ifdef TEST_VOID_PTR #define TYPE void * #elif defined(TEST_FLOAT_PTR) #define TYPE float * #elif defined(TEST_LONG) #define TYPE long #elif defined(TEST_CAP) #define TYPE void *__capability #elif defined(TEST_USHORT) #define TYPE unsigned short #else #error MISSING TYPE #endif /// Check that constant initializers work and are correct _Bool aligned_true = __builtin_is_aligned(1024, 512); // CHECK: @aligned_true = global i8 1, align 1 _Bool aligned_false = __builtin_is_aligned(123, 512); // CHECK: @aligned_false = global i8 0, align 1 int down_1 = __builtin_align_down(1023, 32); // CHECK: @down_1 = global i32 992, align 4 int down_2 = __builtin_align_down(256, 32); // CHECK: @down_2 = global i32 256, align 4 int up_1 = __builtin_align_up(1023, 32); // CHECK: @up_1 = global i32 1024, align 4 int up_2 = __builtin_align_up(256, 32); // CHECK: @up_2 = global i32 256, align 4 /// Capture the IR type here to use in the remaining FileCheck captures: // CHECK: define {{[^@]+}}@get_type() #0 // CHECK-NEXT: entry: // POINTER-NEXT: ret [[$TYPE:.+]] null // INTEGER-NEXT: ret [[$TYPE:.+]] 0 // TYPE get_type(void) { return (TYPE)0; } // CHECK-LABEL: define {{[^@]+}}@is_aligned // CHECK-SAME: ([[$TYPE]] {{[^%]*}}[[PTR:%.*]], i32 [[ALIGN:%.*]]) #0 // CHECK-NEXT: entry: // ALIGNMENT_EXT-NEXT: [[ALIGNMENT:%.*]] = zext i32 [[ALIGN]] to [[ALIGN_TYPE:i64]] // ALIGNMENT_TRUNC-NEXT: [[ALIGNMENT:%.*]] = trunc i32 [[ALIGN]] to [[ALIGN_TYPE:i16]] // CHECK-NEXT: [[MASK:%.*]] = sub [[ALIGN_TYPE]] [[ALIGNMENT]], 1 // POINTER-NEXT: [[PTR:%.*]] = ptrtoint [[$TYPE]] %ptr to i64 // CHECK-NEXT: [[SET_BITS:%.*]] = and [[ALIGN_TYPE]] [[PTR]], [[MASK]] // CHECK-NEXT: [[IS_ALIGNED:%.*]] = icmp eq [[ALIGN_TYPE]] [[SET_BITS]], 0 // CHECK-NEXT: ret i1 [[IS_ALIGNED]] // _Bool is_aligned(TYPE ptr, unsigned align) { return __builtin_is_aligned(ptr, align); } // CHECK-LABEL: define {{[^@]+}}@align_up // CHECK-SAME: ([[$TYPE]] {{[^%]*}}[[PTR:%.*]], i32 [[ALIGN:%.*]]) #0 // CHECK-NEXT: entry: // ALIGNMENT_EXT-NEXT: [[ALIGNMENT:%.*]] = zext i32 [[ALIGN]] to [[ALIGN_TYPE:i64]] // ALIGNMENT_TRUNC-NEXT: [[ALIGNMENT:%.*]] = trunc i32 [[ALIGN]] to [[ALIGN_TYPE:i16]] // CHECK-NEXT: [[MASK:%.*]] = sub [[ALIGN_TYPE]] [[ALIGNMENT]], 1 // INTEGER-NEXT: [[OVER_BOUNDARY:%.*]] = add [[$TYPE]] [[PTR]], [[MASK]] // NOTYET-POINTER-NEXT: [[ALIGNED_RESULT:%.*]] = call [[$TYPE]] @llvm.ptrmask.p0[[$PTRTYPE]].p0i8.i64(i8* [[OVER_BOUNDARY]], [[ALIGN_TYPE]] [[INVERTED_MASK]]) // POINTER-NEXT: [[INTPTR:%.*]] = ptrtoint [[$TYPE]] [[PTR]] to [[ALIGN_TYPE]] // POINTER-NEXT: [[OVER_BOUNDARY:%.*]] = add [[ALIGN_TYPE]] [[INTPTR]], [[MASK]] // CHECK-NEXT: [[INVERTED_MASK:%.*]] = xor [[ALIGN_TYPE]] [[MASK]], -1 // CHECK-NEXT: [[ALIGNED_RESULT:%.*]] = and [[ALIGN_TYPE]] [[OVER_BOUNDARY]], [[INVERTED_MASK]] // POINTER-NEXT: [[DIFF:%.*]] = sub i64 [[ALIGNED_RESULT]], [[INTPTR]] // NON_I8_POINTER-NEXT: [[PTR:%.*]] = bitcast [[$TYPE]] {{%.*}} to i8* // POINTER-NEXT: [[ALIGNED_RESULT:%.*]] = getelementptr inbounds i8, i8* [[PTR]], i64 [[DIFF]] // NON_I8_POINTER-NEXT: [[ALIGNED_RESULT:%.*]] = bitcast i8* {{%.*}} to [[$TYPE]] // POINTER-NEXT: [[ASSUME_MASK:%.*]] = sub i64 %alignment, 1 // POINTER-NEXT: [[ASSUME_INTPTR:%.*]]= ptrtoint [[$TYPE]] [[ALIGNED_RESULT]] to i64 // POINTER-NEXT: [[MASKEDPTR:%.*]] = and i64 %ptrint, [[ASSUME_MASK]] // POINTER-NEXT: [[MASKEDCOND:%.*]] = icmp eq i64 [[MASKEDPTR]], 0 // POINTER-NEXT: call void @llvm.assume(i1 [[MASKEDCOND]]) // CHECK-NEXT: ret [[$TYPE]] [[ALIGNED_RESULT]] // TYPE align_up(TYPE ptr, unsigned align) { return __builtin_align_up(ptr, align); } // CHECK-LABEL: define {{[^@]+}}@align_down // CHECK-SAME: ([[$TYPE]] {{[^%]*}}[[PTR:%.*]], i32 [[ALIGN:%.*]]) #0 // CHECK-NEXT: entry: // ALIGNMENT_EXT-NEXT: [[ALIGNMENT:%.*]] = zext i32 [[ALIGN]] to [[ALIGN_TYPE:i64]] // ALIGNMENT_TRUNC-NEXT: [[ALIGNMENT:%.*]] = trunc i32 [[ALIGN]] to [[ALIGN_TYPE:i16]] // CHECK-NEXT: [[MASK:%.*]] = sub [[ALIGN_TYPE]] [[ALIGNMENT]], 1 // NOTYET-POINTER-NEXT: [[ALIGNED_RESULT:%.*]] = call [[$TYPE]] @llvm.ptrmask.p0[[$PTRTYPE]].p0[[$PTRTYPE]].i64([[$TYPE]] [[PTR]], [[ALIGN_TYPE]] [[INVERTED_MASK]]) // POINTER-NEXT: [[INTPTR:%.*]] = ptrtoint [[$TYPE]] [[PTR]] to [[ALIGN_TYPE]] // CHECK-NEXT: [[INVERTED_MASK:%.*]] = xor [[ALIGN_TYPE]] [[MASK]], -1 // POINTER-NEXT: [[ALIGNED_INTPTR:%.*]] = and [[ALIGN_TYPE]] [[INTPTR]], [[INVERTED_MASK]] // POINTER-NEXT: [[DIFF:%.*]] = sub i64 [[ALIGNED_INTPTR]], [[INTPTR]] // NON_I8_POINTER-NEXT: [[PTR:%.*]] = bitcast [[$TYPE]] {{%.*}} to i8* // POINTER-NEXT: [[ALIGNED_RESULT:%.*]] = getelementptr inbounds i8, i8* [[PTR]], i64 [[DIFF]] // NON_I8_POINTER-NEXT: [[ALIGNED_RESULT:%.*]] = bitcast i8* {{%.*}} to [[$TYPE]] // INTEGER-NEXT: [[ALIGNED_RESULT:%.*]] = and [[ALIGN_TYPE]] [[PTR]], [[INVERTED_MASK]] // POINTER-NEXT: [[ASSUME_MASK:%.*]] = sub i64 %alignment, 1 // POINTER-NEXT: [[ASSUME_INTPTR:%.*]]= ptrtoint [[$TYPE]] [[ALIGNED_RESULT]] to i64 // POINTER-NEXT: [[MASKEDPTR:%.*]] = and i64 %ptrint, [[ASSUME_MASK]] // POINTER-NEXT: [[MASKEDCOND:%.*]] = icmp eq i64 [[MASKEDPTR]], 0 // POINTER-NEXT: call void @llvm.assume(i1 [[MASKEDCOND]]) // CHECK-NEXT: ret [[$TYPE]] [[ALIGNED_RESULT]] // TYPE align_down(TYPE ptr, unsigned align) { return __builtin_align_down(ptr, align); }