1 files changed, 61 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopUnroll/peel-loop2.ll b/llvm/test/Transforms/LoopUnroll/peel-loop2.ll
new file mode 100644
index 00000000000..99e90797e19
--- /dev/null
+++ b/llvm/test/Transforms/LoopUnroll/peel-loop2.ll
@@ -0,0 +1,61 @@
+; RUN: opt -S -loop-unroll -unroll-force-peel-count=1 -verify-dom-info <%s
+
+; Check if loop composed of several BBs is peeled correctly.
+
+declare void @funcb()
+@Comma = external global i8
+define void @funca(i8* readnone %b, i8* readnone %e) {
+entry:
+  %cmp2 = icmp eq i8* %b, %e
+  br i1 %cmp2, label %for.end, label %for.body.preheader
+
+for.body.preheader:
+  br label %for.body
+
+for.body:
+  %b.addr.03 = phi i8* [ %incdec.ptr, %for.inc ], [ %b, %for.body.preheader ]
+  %0 = load i8, i8* @Comma
+  %tobool = icmp eq i8 %0, 0
+  br i1 %tobool, label %for.inc, label %if.then
+
+if.then:
+  tail call void @funcb()
+  store i8 1, i8* @Comma
+  br label %for.inc
+
+for.inc:
+  %incdec.ptr = getelementptr inbounds i8, i8* %b.addr.03, i64 1
+  %cmp = icmp eq i8* %incdec.ptr, %e
+  br i1 %cmp, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
+
+; CHECK_LABEL: @funca
+
+; Peeled iteration
+; CHECK: %[[REG1:[0-9]+]] = load i8, i8* @Comma
+; CHECK: %[[REG2:.*]] = icmp eq i8 %[[REG1]], 0
+; CHECK: br i1 %[[REG2]], label %{{.*}}, label %[[IFTHEN:.*]]
+; CHECK: [[IFTHEN]]:
+; CHECK: call void @funcb()
+; CHECK: store i8 1, i8* @Comma
+; CHECK: br label %[[FORINC]]
+; CHECK: [[FORINC]]:
+; CHECK: %[[REG3:.*]] = getelementptr inbounds i8, i8* %b, i64 1
+; CHECK: %[[REG4:.*]] = icmp eq i8* %[[REG3]], %e
+; CHECK: br i1 %[[REG4]]
+
+; main body
+; CHECK: %[[REG1b:.*]] = load i8, i8* @Comma
+; CHECK: %[[REG2b:.*]] = icmp eq i8 %[[REG1b]], 0
+; CHECK: br i1 %[[REG2b]], label %{{.*}}, label %[[IFTHENb:.*]]
+; CHECK: [[IFTHENb]]:
+; CHECK: call void @funcb()
+; CHECK: store i8 1, i8* @Comma
+; CHECK: br label %[[FORINCb]]
+; CHECK: [[FORINCb]]:
+; CHECK: %[[REG3b:.*]] = getelementptr inbounds i8, i8* %b, i64 1
+; CHECK: %[[REG4b:.*]] = icmp eq i8* %[[REG3b]], %e
+; CHECK: br i1 %[[REG4b]]