1 files changed, 101 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/infer-prestart-no-wrap.ll b/test/Analysis/ScalarEvolution/infer-prestart-no-wrap.ll
new file mode 100644
index 0000000..c9689f7
--- /dev/null
+++ b/test/Analysis/ScalarEvolution/infer-prestart-no-wrap.ll
@@ -0,0 +1,101 @@
+; ; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
+
+define void @infer.sext.0(i1* %c, i32 %start) {
+; CHECK-LABEL: Classifying expressions for: @infer.sext.0
+ entry:
+  br label %loop
+
+ loop:
+  %counter = phi i32 [ 0, %entry ], [ %counter.inc, %loop ]
+  %idx = phi i32 [ %start, %entry ], [ %idx.inc, %loop ]
+  %idx.inc = add nsw i32 %idx, 1
+  %idx.inc.sext = sext i32 %idx.inc to i64
+; CHECK: %idx.inc.sext = sext i32 %idx.inc to i64
+; CHECK-NEXT: -->  {(1 + (sext i32 %start to i64)),+,1}<nsw><%loop>
+  %condition = icmp eq i32 %counter, 1
+  %counter.inc = add i32 %counter, 1
+  br i1 %condition, label %exit, label %loop
+
+ exit:
+  ret void
+}
+
+define void @infer.zext.0(i1* %c, i32 %start) {
+; CHECK-LABEL: Classifying expressions for: @infer.zext.0
+ entry:
+  br label %loop
+
+ loop:
+  %counter = phi i32 [ 0, %entry ], [ %counter.inc, %loop ]
+  %idx = phi i32 [ %start, %entry ], [ %idx.inc, %loop ]
+  %idx.inc = add nuw i32 %idx, 1
+  %idx.inc.sext = zext i32 %idx.inc to i64
+; CHECK: %idx.inc.sext = zext i32 %idx.inc to i64
+; CHECK-NEXT: -->  {(1 + (zext i32 %start to i64)),+,1}<nuw><%loop>
+  %condition = icmp eq i32 %counter, 1
+  %counter.inc = add i32 %counter, 1
+  br i1 %condition, label %exit, label %loop
+
+ exit:
+  ret void
+}
+
+define void @infer.sext.1(i32 %start, i1* %c) {
+; CHECK-LABEL: Classifying expressions for: @infer.sext.1
+ entry:
+  %start.mul = mul i32 %start, 4
+  %start.real = add i32 %start.mul, 2
+  br label %loop
+
+ loop:
+  %idx = phi i32 [ %start.real, %entry ], [ %idx.inc, %loop ]
+  %idx.sext = sext i32 %idx to i64
+; CHECK: %idx.sext = sext i32 %idx to i64
+; CHECK-NEXT:  -->  {(2 + (sext i32 (4 * %start) to i64)),+,2}<nsw><%loop>
+  %idx.inc = add nsw i32 %idx, 2
+  %condition = load i1* %c
+  br i1 %condition, label %exit, label %loop
+
+ exit:
+  ret void
+}
+
+define void @infer.sext.2(i1* %c, i8 %start) {
+; CHECK-LABEL: Classifying expressions for: @infer.sext.2
+ entry:
+  %start.inc = add i8 %start, 1
+  %entry.condition = icmp slt i8 %start, 127
+  br i1 %entry.condition, label %loop, label %exit
+
+ loop:
+  %idx = phi i8 [ %start.inc, %entry ], [ %idx.inc, %loop ]
+  %idx.sext = sext i8 %idx to i16
+; CHECK: %idx.sext = sext i8 %idx to i16
+; CHECK-NEXT: -->  {(1 + (sext i8 %start to i16)),+,1}<nsw><%loop>
+  %idx.inc = add nsw i8 %idx, 1
+  %condition = load volatile i1* %c
+  br i1 %condition, label %exit, label %loop
+
+ exit:
+  ret void
+}
+
+define void @infer.zext.1(i1* %c, i8 %start) {
+; CHECK-LABEL: Classifying expressions for: @infer.zext.1
+ entry:
+  %start.inc = add i8 %start, 1
+  %entry.condition = icmp ult i8 %start, 255
+  br i1 %entry.condition, label %loop, label %exit
+
+ loop:
+  %idx = phi i8 [ %start.inc, %entry ], [ %idx.inc, %loop ]
+  %idx.zext = zext i8 %idx to i16
+; CHECK: %idx.zext = zext i8 %idx to i16
+; CHECK-NEXT: -->  {(1 + (zext i8 %start to i16)),+,1}<nuw><%loop>
+  %idx.inc = add nuw i8 %idx, 1
+  %condition = load volatile i1* %c
+  br i1 %condition, label %exit, label %loop
+
+ exit:
+  ret void
+}