1 files changed, 67 insertions, 0 deletions
diff --git a/test/Transforms/LoopStrengthReduce/uglygep.ll b/test/Transforms/LoopStrengthReduce/uglygep.ll
new file mode 100644
index 0000000..dca97e9
--- /dev/null
+++ b/test/Transforms/LoopStrengthReduce/uglygep.ll
@@ -0,0 +1,67 @@
+; RUN: opt < %s -loop-reduce -S | not grep uglygep
+
+; LSR shouldn't consider %t8 to be an interesting user of %t6, and it
+; should be able to form pretty GEPs.
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @Z4() nounwind {
+bb:
+  br label %bb3
+
+bb1:                                              ; preds = %bb3
+  br i1 undef, label %bb10, label %bb2
+
+bb2:                                              ; preds = %bb1
+  %t = add i64 %t4, 1                         ; <i64> [#uses=1]
+  br label %bb3
+
+bb3:                                              ; preds = %bb2, %bb
+  %t4 = phi i64 [ %t, %bb2 ], [ 0, %bb ]      ; <i64> [#uses=3]
+  br label %bb1
+
+bb10:                                             ; preds = %bb9
+  %t7 = icmp eq i64 %t4, 0                    ; <i1> [#uses=1]
+  %t3 = add i64 %t4, 16                     ; <i64> [#uses=1]
+  br label %bb14
+
+bb14:                                             ; preds = %bb14, %bb10
+  %t2 = getelementptr inbounds i8* undef, i64 %t4 ; <i8*> [#uses=1]
+  store i8 undef, i8* %t2
+  %t6 = load float** undef
+  %t8 = bitcast float* %t6 to i8*              ; <i8*> [#uses=1]
+  %t9 = getelementptr inbounds i8* %t8, i64 %t3 ; <i8*> [#uses=1]
+  store i8 undef, i8* %t9
+  br label %bb14
+}
+
+define fastcc void @TransformLine() nounwind {
+bb:
+  br label %loop0
+
+loop0:                                            ; preds = %loop0, %bb
+  %i0 = phi i32 [ %i0.next, %loop0 ], [ 0, %bb ]  ; <i32> [#uses=2]
+  %i0.next = add i32 %i0, 1                       ; <i32> [#uses=1]
+  br i1 false, label %loop0, label %bb0
+
+bb0:                                              ; preds = %loop0
+  br label %loop1
+
+loop1:                                            ; preds = %bb5, %bb0
+  %i1 = phi i32 [ 0, %bb0 ], [ %i1.next, %bb5 ]   ; <i32> [#uses=4]
+  %t0 = add i32 %i0, %i1                          ; <i32> [#uses=1]
+  br i1 false, label %bb2, label %bb6
+
+bb2:                                              ; preds = %loop1
+  br i1 true, label %bb6, label %bb5
+
+bb5:                                              ; preds = %bb2
+  %i1.next = add i32 %i1, 1                       ; <i32> [#uses=1]
+  br i1 true, label %bb6, label %loop1
+
+bb6:                                              ; preds = %bb5, %bb2, %loop1
+  %p8 = phi i32 [ %t0, %bb5 ], [ undef, %loop1 ], [ undef, %bb2 ] ; <i32> [#uses=0]
+  %p9 = phi i32 [ undef, %bb5 ], [ %i1, %loop1 ], [ %i1, %bb2 ] ; <i32> [#uses=0]
+  unreachable
+}