llvm/clang/test/CodeGen/non-power-of-2-alignment-assumptions.c

// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm %s -o - | FileCheck %s

void *__attribute__((alloc_align(1))) alloc(int align);

// CHECK-LABEL: @t0(
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[ALIGN_ADDR:%.*]] = alloca i32, align 4
// CHECK-NEXT:    store i32 [[ALIGN:%.*]], ptr [[ALIGN_ADDR]], align 4
// CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ALIGN_ADDR]], align 4
// CHECK-NEXT:    [[CALL:%.*]] = call ptr @alloc(i32 noundef [[TMP0]])
// CHECK-NEXT:    [[CASTED_ALIGN:%.*]] = zext i32 [[TMP0]] to i64
// CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[CALL]], i64 [[CASTED_ALIGN]]) ]
// CHECK-NEXT:    ret void
//
void t0(int align) {
  alloc(align);
}
// CHECK-LABEL: @t1(
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[ALIGN_ADDR:%.*]] = alloca i32, align 4
// CHECK-NEXT:    store i32 [[ALIGN:%.*]], ptr [[ALIGN_ADDR]], align 4
// CHECK-NEXT:    [[CALL:%.*]] = call ptr @alloc(i32 noundef 7)
// CHECK-NEXT:    call void @llvm.assume(i1 true) [ "align"(ptr [[CALL]], i64 7) ]
// CHECK-NEXT:    ret void
//
void t1(int align) {
  alloc(7);
}
// CHECK-LABEL: @t2(
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[ALIGN_ADDR:%.*]] = alloca i32, align 4
// CHECK-NEXT:    store i32 [[ALIGN:%.*]], ptr [[ALIGN_ADDR]], align 4
// CHECK-NEXT:    [[CALL:%.*]] = call align 8 ptr @alloc(i32 noundef 8)
// CHECK-NEXT:    ret void
//
void t2(int align) {
  alloc(8);
}