clang/test/CodeGen/pgo-sample-preparation.c

   1 // Test if PGO sample use preparation passes are executed correctly.
   2 //
   3 // Ensure that instcombine is executed after simplifycfg and sroa so that
   4 // "a < 255" will not be converted to a * 256 < 255 * 256.
   5 // RUN: %clang_cc1 -O2 -fprofile-sample-use=%S/Inputs/pgo-sample.prof %s -emit-llvm -o - 2>&1 | FileCheck %s
   6
   7 void bar(int);
   8 void foo(int x, int y, int z) {
   9   int m;
  10   for (m = 0; m < x ; m++) {
  11     int a = (((y >> 8) & 0xff) * z) / 256;
  12     bar(a < 255 ? a : 255);
  13   }
  14 }
  15
  16 // CHECK-NOT: icmp slt i32 %mul, 65280