Add testcase for r138746.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138747 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/ARM/2011-08-29-ldr_pre_imm.ll

@@ -0,0 +1,34 @@
+; RUN: llc -O3 -mtriple=armv6-apple-darwin -relocation-model=pic < %s
+
+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-v64:32:64-v128:32:128-a0:0:64-n32"
+
+define void @compdecomp() nounwind {
+entry:
+  %heap = alloca [256 x i32], align 4
+  br i1 undef, label %bb25.lr.ph, label %bb17
+
+bb17:                                             ; preds = %bb17, %entry
+  br label %bb17
+
+bb25.lr.ph:                                       ; preds = %entry
+  %0 = sdiv i32 undef, 2
+  br label %bb5.i
+
+bb.i:                                             ; preds = %bb5.i
+  %1 = shl nsw i32 %k_addr.0.i, 1
+  %.sum8.i = add i32 %1, -1
+  %2 = getelementptr inbounds [256 x i32]* %heap, i32 0, i32 %.sum8.i
+  %3 = load i32* %2, align 4
+  br i1 false, label %bb5.i, label %bb4.i
+
+bb4.i:                                            ; preds = %bb.i
+  %.sum10.i = add i32 %k_addr.0.i, -1
+  %4 = getelementptr inbounds [256 x i32]* %heap, i32 0, i32 %.sum10.i
+  store i32 %3, i32* %4, align 4
+  br label %bb5.i
+
+bb5.i:                                            ; preds = %bb5.i, %bb4.i, %bb.i, %bb25.lr.ph
+  %k_addr.0.i = phi i32 [ %1, %bb4.i ], [ undef, %bb25.lr.ph ], [ undef, %bb5.i ], [ undef, %bb.i ]
+  %5 = icmp slt i32 %0, %k_addr.0.i
+  br i1 %5, label %bb5.i, label %bb.i
+}