1 files changed, 33 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/arm64-regress-interphase-shift.ll b/test/CodeGen/AArch64/arm64-regress-interphase-shift.ll
new file mode 100644
index 0000000..fec8933
--- /dev/null
+++ b/test/CodeGen/AArch64/arm64-regress-interphase-shift.ll
@@ -0,0 +1,33 @@
+; RUN: llc -march=arm64 -o - %s | FileCheck %s
+
+; This is mostly a "don't assert" test. The type of the RHS of a shift depended
+; on the phase of legalization, which led to the creation of an unexpected and
+; unselectable "rotr" node: (i32 (rotr i32, i64)).
+
+; FIXME: This test is xfailed because it relies on an optimization that has
+; been reverted (see PR17975).
+; XFAIL: *
+
+define void @foo(i64* nocapture %d) {
+; CHECK-LABEL: foo:
+; CHECK: rorv
+  %tmp = load i64* undef, align 8
+  %sub397 = sub i64 0, %tmp
+  %and398 = and i64 %sub397, 4294967295
+  %shr404 = lshr i64 %and398, 0
+  %or405 = or i64 0, %shr404
+  %xor406 = xor i64 %or405, 0
+  %xor417 = xor i64 0, %xor406
+  %xor428 = xor i64 0, %xor417
+  %sub430 = sub i64 %xor417, 0
+  %and431 = and i64 %sub430, 4294967295
+  %and432 = and i64 %xor428, 31
+  %sub433 = sub i64 32, %and432
+  %shl434 = shl i64 %and431, %sub433
+  %shr437 = lshr i64 %and431, %and432
+  %or438 = or i64 %shl434, %shr437
+  %xor439 = xor i64 %or438, %xor428
+  %sub441 = sub i64 %xor439, 0
+  store i64 %sub441, i64* %d, align 8
+  ret void
+}