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Unified Diff: crosstest/test_strengthreduce.cpp

Issue 1146803002: Subzero: Strength-reduce mul by certain constants. (Closed) Base URL: https://chromium.googlesource.com/native_client/pnacl-subzero.git@master
Patch Set: Remove a TODO Created 5 years, 6 months ago
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Index: crosstest/test_strengthreduce.cpp
diff --git a/crosstest/test_strengthreduce.cpp b/crosstest/test_strengthreduce.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b6be659bb3cb257eebf15e113fbf3bb50fab9c2e
--- /dev/null
+++ b/crosstest/test_strengthreduce.cpp
@@ -0,0 +1,30 @@
+//===- subzero/crosstest/test_strengthreduce.cpp - Strength reduction -----===//
+//
+// The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Implementation for crosstesting strength reduction.
+//
+//===----------------------------------------------------------------------===//
+
+#include "test_strengthreduce.h"
+
+// TODO(stichnot): Extend to i16 and i8 types, and also test the
+// commutativity transformations. This may require hand-generating
+// .ll files, because of C/C++ integer promotion rules for arithmetic,
+// and because clang prefers to do its own commutativity
+// transformation.
+
+#define X(constant, suffix) \
+ uint32_t multiplyByConst##suffix(uint32_t Val) { \
+ return Val * (uint32_t)constant; \
+ } \
+ int32_t multiplyByConst##suffix(int32_t Val) { \
+ return Val * (int32_t)constant; \
+ }
+CONST_TABLE
+#undef X
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