clang/test/CodeGen/builtin-abs.c

   1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck %s
   2
   3 int absi(int x) {
   4 // CHECK-LABEL: @absi(
   5 // CHECK:   [[NEG:%.*]] = sub nsw i32 0, [[X:%.*]]
   6 // CHECK:   [[CMP:%.*]] = icmp slt i32 [[X]], 0
   7 // CHECK:   [[SEL:%.*]] = select i1 [[CMP]], i32 [[NEG]], i32 [[X]]
   8 //
   9   return __builtin_abs(x);
  10 }
  11
  12 long absl(long x) {
  13 // CHECK-LABEL: @absl(
  14 // CHECK:   [[NEG:%.*]] = sub nsw i64 0, [[X:%.*]]
  15 // CHECK:   [[CMP:%.*]] = icmp slt i64 [[X]], 0
  16 // CHECK:   [[SEL:%.*]] = select i1 [[CMP]], i64 [[NEG]], i64 [[X]]
  17 //
  18   return __builtin_labs(x);
  19 }
  20
  21 long long absll(long long x) {
  22 // CHECK-LABEL: @absll(
  23 // CHECK:   [[NEG:%.*]] = sub nsw i64 0, [[X:%.*]]
  24 // CHECK:   [[CMP:%.*]] = icmp slt i64 [[X]], 0
  25 // CHECK:   [[SEL:%.*]] = select i1 [[CMP]], i64 [[NEG]], i64 [[X]]
  26 //
  27   return __builtin_llabs(x);
  28 }
  29