Lower stacksave and restore intrinsics.

crosstest/test_stacksave_main.c

Index: crosstest/test_stacksave_main.c
diff --git a/crosstest/test_stacksave_main.c b/crosstest/test_stacksave_main.c
new file mode 100644
index 0000000000000000000000000000000000000000..a5ab2483b27a1256403d63091566cd41487c5919
--- /dev/null
+++ b/crosstest/test_stacksave_main.c
@@ -0,0 +1,61 @@
+//===- subzero/crosstest/test_stacksave_main.c - Driver for tests ---------===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Driver for cross testing stacksave/stackrestore intrinsics.
+//
+//===----------------------------------------------------------------------===//
+
+/* crosstest.py --test=test_stacksave.c --driver=test_stacksave_main.c \
+   --prefix=Subzero_ --output=test_stacksave */
+
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "test_stacksave.h"
+DECLARE_TESTS()
+DECLARE_TESTS(Subzero_)
+
+int main(int argc, char **argv) {
+  size_t TotalTests = 0;
+  size_t Passes = 0;
+  size_t Failures = 0;
+  typedef uint32_t (*FuncType)(uint32_t, uint32_t, uint32_t);
+  static struct {
+    const char *Name;
+    FuncType FuncLlc;
+    FuncType FuncSz;
+  } Funcs[] = {
+    { "test_basic_vla", test_basic_vla, Subzero_test_basic_vla },
+    { "test_vla_in_loop", test_vla_in_loop, Subzero_test_vla_in_loop },
+    { "test_two_vlas_in_loops", test_two_vlas_in_loops,
+      Subzero_test_two_vlas_in_loops }
+  };
+  const static size_t NumFuncs = sizeof(Funcs) / sizeof(*Funcs);
+  const uint32_t size_to_test = 128;
+  for (size_t f = 0; f < NumFuncs; ++f) {
+    for (uint32_t start = 0; start < size_to_test / 2; ++start) {
+      ++TotalTests;
+      uint32_t inc = (start / 10) + 1;
+      uint32_t llc_result = Funcs[f].FuncLlc(size_to_test, start, inc);
+      uint32_t sz_result = Funcs[f].FuncSz(size_to_test, start, inc);
+      if (llc_result == sz_result) {
+        ++Passes;
+      } else {
+        ++Failures;
+        printf("Failure %s: start=%" PRIu32 ", "
+               "llc=%" PRIu32 ", sz=%" PRIu32 "\n",
+               Funcs[f].Name, start, llc_result, sz_result);
+      }
+    }
+  }
+  printf("TotalTests=%zu Passes=%zu Failures=%zu\n",
+         TotalTests, Passes, Failures);
+  return Failures;
+}