clang/test/C/C2x/n2683_2.c

   1 // NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 3
   2 // RUN: %clang_cc1 -triple=x86_64 -emit-llvm -o - -std=c23 %s | FileCheck %s
   3
   4 #include <stdckdint.h>
   5 #include <stdint.h>
   6
   7 // CHECK-LABEL: define dso_local void @test_add_overflow_to64(
   8 // CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
   9 // CHECK-NEXT:  entry:
  10 // CHECK-NEXT:    [[RESULT64:%.*]] = alloca i64, align 8
  11 // CHECK-NEXT:    [[FLAG_ADD:%.*]] = alloca i8, align 1
  12 // CHECK-NEXT:    store i64 0, ptr [[RESULT64]], align 8
  13 // CHECK-NEXT:    [[TMP0:%.*]] = call { i64, i1 } @llvm.sadd.with.overflow.i64(i64 2147483647, i64 1)
  14 // CHECK-NEXT:    [[TMP1:%.*]] = extractvalue { i64, i1 } [[TMP0]], 1
  15 // CHECK-NEXT:    [[TMP2:%.*]] = extractvalue { i64, i1 } [[TMP0]], 0
  16 // CHECK-NEXT:    store i64 [[TMP2]], ptr [[RESULT64]], align 8
  17 // CHECK-NEXT:    [[FROMBOOL:%.*]] = zext i1 [[TMP1]] to i8
  18 // CHECK-NEXT:    store i8 [[FROMBOOL]], ptr [[FLAG_ADD]], align 1
  19 // CHECK-NEXT:    ret void
  20 //
  21 void test_add_overflow_to64() {
  22   int64_t result64 = 0;
  23   bool flag_add = ckd_add(&result64, INT32_MAX, 1);
  24 }
  25
  26 // CHECK-LABEL: define dso_local void @test_sub_overflow(
  27 // CHECK-SAME: ) #[[ATTR0]] {
  28 // CHECK-NEXT:  entry:
  29 // CHECK-NEXT:    [[RESULT32:%.*]] = alloca i32, align 4
  30 // CHECK-NEXT:    [[FLAG_SUB:%.*]] = alloca i8, align 1
  31 // CHECK-NEXT:    store i32 0, ptr [[RESULT32]], align 4
  32 // CHECK-NEXT:    [[TMP0:%.*]] = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 2147483647, i32 -1)
  33 // CHECK-NEXT:    [[TMP1:%.*]] = extractvalue { i32, i1 } [[TMP0]], 1
  34 // CHECK-NEXT:    [[TMP2:%.*]] = extractvalue { i32, i1 } [[TMP0]], 0
  35 // CHECK-NEXT:    store i32 [[TMP2]], ptr [[RESULT32]], align 4
  36 // CHECK-NEXT:    [[FROMBOOL:%.*]] = zext i1 [[TMP1]] to i8
  37 // CHECK-NEXT:    store i8 [[FROMBOOL]], ptr [[FLAG_SUB]], align 1
  38 // CHECK-NEXT:    ret void
  39 //
  40 void test_sub_overflow() {
  41   int32_t result32 = 0;
  42   bool flag_sub = ckd_sub(&result32, INT32_MAX, -1);
  43 }
  44
  45 // CHECK-LABEL: define dso_local void @test_mul_normal(
  46 // CHECK-SAME: ) #[[ATTR0]] {
  47 // CHECK-NEXT:  entry:
  48 // CHECK-NEXT:    [[A:%.*]] = alloca i32, align 4
  49 // CHECK-NEXT:    [[RESULT:%.*]] = alloca i32, align 4
  50 // CHECK-NEXT:    [[FLAG_MUL:%.*]] = alloca i8, align 1
  51 // CHECK-NEXT:    store i32 3, ptr [[A]], align 4
  52 // CHECK-NEXT:    store i32 0, ptr [[RESULT]], align 4
  53 // CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[A]], align 4
  54 // CHECK-NEXT:    [[TMP1:%.*]] = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 [[TMP0]], i32 2)
  55 // CHECK-NEXT:    [[TMP2:%.*]] = extractvalue { i32, i1 } [[TMP1]], 1
  56 // CHECK-NEXT:    [[TMP3:%.*]] = extractvalue { i32, i1 } [[TMP1]], 0
  57 // CHECK-NEXT:    store i32 [[TMP3]], ptr [[RESULT]], align 4
  58 // CHECK-NEXT:    [[FROMBOOL:%.*]] = zext i1 [[TMP2]] to i8
  59 // CHECK-NEXT:    store i8 [[FROMBOOL]], ptr [[FLAG_MUL]], align 1
  60 // CHECK-NEXT:    ret void
  61 //
  62 void test_mul_normal() {
  63   int a = 3;
  64   int result = 0;
  65   bool flag_mul = ckd_mul(&result, a, 2);
  66 }