update polly tests

Author: nikic

polly/test/CodeGen/inner_scev_sdiv_2.ll

@@ -34,7 +34,7 @@ for.cond.60.preheader:                            ; preds = %for.body.51, %for.c
   ret void
 
 for.body.51:                                      ; preds = %for.body.51, %for.body.51.lr.ph
-  %indvars.iv86 = phi i64 [ %2, %for.body.51.lr.ph ], [ undef, %for.body.51 ]
+  %indvars.iv86 = phi i64 [ %2, %for.body.51.lr.ph ], [ poison, %for.body.51 ]
   %arrayidx53 = getelementptr inbounds float, ptr %0, i64 %indvars.iv86
   %3 = load float, ptr %arrayidx53, align 4
   %mul56 = fmul float %3, undef

polly/test/CodeGen/inner_scev_sdiv_3.ll

@@ -36,7 +36,7 @@ end:
   ret i64 %div44.m
 
 for.body.51:                                      ; preds = %for.body.51, %for.body.51.lr.ph
-  %indvars.iv86 = phi i64 [ %2, %for.body.51.lr.ph ], [ undef, %for.body.51 ]
+  %indvars.iv86 = phi i64 [ %2, %for.body.51.lr.ph ], [ poison, %for.body.51 ]
   %arrayidx53 = getelementptr inbounds float, ptr %0, i64 %indvars.iv86
   %3 = load float, ptr %arrayidx53, align 4
   %mul56 = fmul float %3, undef

polly/test/CodeGen/phi-defined-before-scop.ll

@@ -19,7 +19,7 @@ bb:
   br label %bb1
 
 bb1:                                              ; preds = %bb6, %bb
-  %tmp2 = phi ptr [ %tmp7, %bb6 ], [ undef, %bb ]
+  %tmp2 = phi ptr [ %tmp7, %bb6 ], [ poison, %bb ]
   %tmp = load ptr, ptr @global, align 8, !tbaa !1
   br label %bb3
 

polly/test/CodeGen/scop_expander_insert_point.ll

@@ -28,7 +28,7 @@ for.body17.lr.ph:                                 ; preds = %for.end22, %for.con
 
 for.body17:                                       ; preds = %for.body17, %for.body17.lr.ph
   %outvalue.141 = phi i64 [ undef, %for.body17.lr.ph ], [ %add19, %for.body17 ]
-  %inptr.040 = phi ptr [ %add.ptr, %for.body17.lr.ph ], [ undef, %for.body17 ]
+  %inptr.040 = phi ptr [ %add.ptr, %for.body17.lr.ph ], [ poison, %for.body17 ]
   %1 = load i8, ptr %inptr.040
   %add19 = mul nsw i64 0, %outvalue.141
   br i1 false, label %for.body17, label %for.end22

polly/test/CodeGen/stack-overflow-in-load-hoisting.ll

@@ -42,7 +42,7 @@ for.cond.12.preheader.lr.ph:                      ; preds = %entry
   br label %for.body.14.lr.ph
 
 for.body.14.lr.ph:                                ; preds = %for.end, %for.cond.12.preheader.lr.ph
-  %d.050 = phi ptr [ %tmp3, %for.cond.12.preheader.lr.ph ], [ undef, %for.end ]
+  %d.050 = phi ptr [ %tmp3, %for.cond.12.preheader.lr.ph ], [ poison, %for.end ]
   %w = getelementptr inbounds %struct.AudioVectorScopeContext.21.43.879.1209.1297.1319.1573, ptr %s, i32 0, i32 2
   %tmp4 = load i32, ptr %w, align 4
   %cmp13.46 = icmp sgt i32 %tmp4, 0

polly/test/ScopInfo/complex_domain_binary_condition.ll

@@ -35,7 +35,7 @@ for.body104.lr.ph:                                ; preds = %entry
   br label %for.body104
 
 for.body104:                                      ; preds = %while.end146, %for.body104.lr.ph
-  %indvars.iv = phi i64 [ %6, %for.body104.lr.ph ], [ undef, %while.end146 ]
+  %indvars.iv = phi i64 [ %6, %for.body104.lr.ph ], [ poison, %while.end146 ]
   %7 = sub nsw i64 %indvars.iv, %idx.ext62
   %cmp107 = icmp slt i64 %7, -1
   %.op = xor i64 %7, -1