[RDF] Further improve handling of multiple phis reached from shadows

llvm-svn: 280987

1 files changed, 40 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/Hexagon/rdf-multiple-phis-up.ll b/llvm/test/CodeGen/Hexagon/rdf-multiple-phis-up.ll
new file mode 100644
index 00000000000..d23846ac6ed
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/rdf-multiple-phis-up.ll
@@ -0,0 +1,40 @@
+; RUN: llc -march=hexagon < %s | FileCheck %s
+; REQUIRES: asserts
+
+; Check that we do not crash.
+; CHECK: call foo
+
+target triple = "hexagon"
+
+%struct.0 = type { i8*, i8*, [2 x i8*], i32, i32, i8*, i32, i32, i32, i32, i32, [2 x i32], i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 }
+
+define i32 @fred(i8* %p0) local_unnamed_addr #0 {
+entry:
+  %0 = bitcast i8* %p0 to %struct.0*
+  br i1 undef, label %if.then21, label %for.body.i
+
+if.then21:                                        ; preds = %entry
+  %.pr = load i32, i32* undef, align 4
+  switch i32 %.pr, label %cleanup [
+    i32 1, label %for.body.i
+    i32 3, label %if.then60
+  ]
+
+for.body.i:                                       ; preds = %for.body.i, %if.then21, %entry
+  %1 = load i8, i8* undef, align 1
+  %cmp7.i = icmp ugt i8 %1, -17
+  br i1 %cmp7.i, label %cleanup, label %for.body.i
+
+if.then60:                                        ; preds = %if.then21
+  %call61 = call i32 @foo(%struct.0* nonnull %0) #0
+  br label %cleanup
+
+cleanup:                                          ; preds = %if.then60, %for.body.i, %if.then21
+  ret i32 undef
+}
+
+declare i32 @foo(%struct.0*) local_unnamed_addr #0
+
+
+attributes #0 = { nounwind }
+