1 files changed, 16 insertions, 0 deletions
diff --git a/clang/test/CodeGen/pgo-sample-preparation.c b/clang/test/CodeGen/pgo-sample-preparation.c
new file mode 100644
index 00000000000..c0a3cb4bc59
--- /dev/null
+++ b/clang/test/CodeGen/pgo-sample-preparation.c
@@ -0,0 +1,16 @@
+// Test if PGO sample use preparation passes are executed correctly.
+//
+// Ensure that instcombine is executed after simplifycfg and sroa so that
+// "a < 255" will not be converted to a * 256 < 255 * 256.
+// RUN: %clang_cc1 -O2 -fprofile-sample-use=%S/Inputs/pgo-sample.prof %s -emit-llvm -o - 2>&1 | FileCheck %s
+
+void bar(int);
+void foo(int x, int y, int z) {
+  int m;
+  for (m = 0; m < x ; m++) {
+    int a = (((y >> 8) & 0xff) * z) / 256;
+    bar(a < 255 ? a : 255);
+  }
+}
+
+// CHECK-NOT: icmp slt i32 %mul, 65280