Test case for recent patch for IndVarSimplify.cpp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37838 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/IndVarsSimplify/iterationCount_zext_or_trunc.ll b/test/Transforms/IndVarsSimplify/iterationCount_zext_or_trunc.ll
new file mode 100644 (file)
index 0000000..0331f23
--- /dev/null
+++ b/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
+}