testcase for A[invariant][indvar] where invariant is an instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20500 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LoopStrengthReduce/invariant_value_first_arg.ll b/test/Transforms/LoopStrengthReduce/invariant_value_first_arg.ll
new file mode 100644 (file)
index 0000000..7bbd8da
--- /dev/null
+++ b/test/Transforms/LoopStrengthReduce/invariant_value_first_arg.ll
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+; Check that the index of 'P[outer]' is pulled out of the loop.
+; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | not grep 'getelementptr.*%outer.*%INDVAR'
+
+declare bool %pred()
+
+void %test([10000 x int]* %P, int %outer) {
+       br label %Loop
+Loop:
+       %INDVAR = phi int [0, %0], [%INDVAR2, %Loop]
+
+       %STRRED = getelementptr [10000 x int]* %P, int %outer, int %INDVAR
+       store int 0, int* %STRRED
+
+       %INDVAR2 = add int %INDVAR, 1
+       %cond = call bool %pred()
+       br bool %cond, label %Loop, label %Out
+Out:
+       ret void
+}