[PowerPC] Hardware Loop branch instruction's condition may not be icmp.

This fixes pr42492.
Differential Revision: https://reviews.llvm.org/D64124

llvm-svn: 365104

1 files changed, 32 insertions, 0 deletions

diff --git a/llvm/test/Transforms/HardwareLoops/unscevable.ll b/llvm/test/Transforms/HardwareLoops/unscevable.ll
index 63932c5682f..cd9c3e7863b 100644
--- a/llvm/test/Transforms/HardwareLoops/unscevable.ll
+++ b/llvm/test/Transforms/HardwareLoops/unscevable.ll
@@ -45,3 +45,35 @@ while.body:
 while.end:
   ret void
 }
+
+; CHECK-LABEL: variant_counter2
+; CHECK-NOT: set.loop.iterations
+; CHECK-NOT: loop.decrement
+define void @variant_counter2(i8*, i8*, i64*) {
+  %4 = icmp eq i8* %0, %1
+  br i1 %4, label %9, label %5
+
+5:                                                ; preds = %3
+  %6 = getelementptr inbounds i64, i64* %2, i64 1
+  %7 = load i64, i64* %6, align 8
+  br label %10
+
+8:                                                ; preds = %10
+  store i64 %14, i64* %6, align 8
+  br label %9
+
+9:                                                ; preds = %8, %3
+  ret void
+
+10:                                               ; preds = %5, %10
+  %11 = phi i64 [ %7, %5 ], [ %14, %10 ]
+  %12 = phi i32 [ 0, %5 ], [ %15, %10 ]
+  %13 = phi i8* [ %0, %5 ], [ %16, %10 ]
+  %14 = shl nsw i64 %11, 4
+  %15 = add nuw nsw i32 %12, 1
+  %16 = getelementptr inbounds i8, i8* %13, i64 1
+  %17 = icmp ugt i32 %12, 14
+  %18 = icmp eq i8* %16, %1
+  %19 = or i1 %18, %17
+  br i1 %19, label %8, label %10
+}