Test case for recent patch for IndVarSimplify.cpp

llvm-svn: 37838

1 files changed, 25 insertions, 0 deletions

diff --git a/llvm/test/Transforms/IndVarsSimplify/iterationCount_zext_or_trunc.ll b/llvm/test/Transforms/IndVarsSimplify/iterationCount_zext_or_trunc.ll
new file mode 100644
index 00000000000..0331f23f285
--- /dev/null
+++ b/llvm/test/Transforms/IndVarsSimplify/iterationCount_zext_or_trunc.ll
@@ -0,0 +1,25 @@
+; RUN: llvm-as < %s | opt -indvars -disable-output
+
+; ModuleID = 'testcase.bc'
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64"
+target triple = "i686-pc-linux-gnu"
+
+define i32 @testcase(i5 zext  %k) {
+entry:
+	br label %bb2
+
+bb:		; preds = %bb2
+	%tmp1 = add i32 %tmp2, %result		; <i32> [#uses=1]
+	%indvar_next1 = add i5 %k_0, 1		; <i5> [#uses=1]
+	br label %bb2
+
+bb2:		; preds = %bb, %entry
+	%k_0 = phi i5 [ 0, %entry ], [ %indvar_next1, %bb ]		; <i5> [#uses=2]
+	%result = phi i32 [ 0, %entry ], [ %tmp1, %bb ]		; <i32> [#uses=2]
+	%tmp2 = zext i5 %k_0 to i32		; <i32> [#uses=1]
+	%exitcond = icmp eq i32 %tmp2, 16		; <i1> [#uses=1]
+	br i1 %exitcond, label %bb3, label %bb
+
+bb3:		; preds = %bb2
+	ret i32 %result
+}