clang/test/Profile/c-ternary.c

   1 // RUN: %clang_cc1 -triple x86_64-apple-macosx10.11.0 -x c %s -o - -emit-llvm -fprofile-instrument=clang | FileCheck %s
   2
   3 // PR32019: Clang can lower some ternary operator expressions to select
   4 // instructions. Make sure we only increment the profile counter for the
   5 // condition when the condition evaluates to true.
   6 // CHECK-LABEL: define{{.*}} i32 @f1
   7 int f1(int x) {
   8   // CHECK: [[TOBOOL:%.*]] = icmp ne i32 %{{.*}}, 0
   9   // CHECK-NEXT: [[STEP:%.*]] = zext i1 [[TOBOOL]] to i64
  10   // CHECK-NEXT: [[COUNTER:%.*]] = load i64, ptr getelementptr inbounds ([2 x i64], ptr @__profc_f1, i32 0, i32 1)
  11   // CHECK-NEXT: add i64 [[COUNTER]], [[STEP]]
  12   // CHECK: [[COND:%.*]] = select i1 [[TOBOOL]], i32 0, i32 1
  13   return x ? 0 : 1;
  14 // CHECK: ret i32 [[COND]]
  15 }