New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12518 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/getelementptr_const.ll b/test/Transforms/InstCombine/getelementptr_const.ll
new file mode 100644 (file)
index 0000000..a4150de
--- /dev/null
+++ b/test/Transforms/InstCombine/getelementptr_const.ll
@@ -0,0 +1,13 @@
+; Test folding of constantexpr geps into normal geps.
+; RUN: llvm-as < %s | opt -instcombine -gcse -instcombine | llvm-dis | not grep getelementptr
+
+%Array = external global [40 x int]
+
+int %test(long %X) {
+       %A = getelementptr int* getelementptr ([40 x int]* %Array, long 0, long 0), long %X
+       %B = getelementptr [40 x int]* %Array, long 0, long %X
+       %a = cast int* %A to int
+       %b = cast int* %B to int
+       %c = sub int %a, %b
+       ret int %c
+}