From 74954a854b1c06a2c04e108e8d3abda309c9c6ed Mon Sep 17 00:00:00 2001
From: LLVM Packaging Team <pkg-llvm-team@lists.alioth.debian.org>
Date: Wed, 18 Oct 2017 15:37:25 +0100
Subject: [PATCH] armhf-bitfield

===================================================================

Gbp-Pq: Name armhf-bitfield.diff
---
 lib/Target/ARM/ARMISelLowering.cpp |  4 ++--
 test/CodeGen/ARM/no-cmov2bfi.ll    | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)
 create mode 100644 test/CodeGen/ARM/no-cmov2bfi.ll

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index d75d6968f..0b9971709 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -11324,8 +11324,8 @@ static void computeKnownBits(SelectionDAG &DAG, SDValue Op, APInt &KnownZero,
   if (Op.getOpcode() == ARMISD::CMOV) {
     APInt KZ2(KnownZero.getBitWidth(), 0);
     APInt KO2(KnownOne.getBitWidth(), 0);
-    computeKnownBits(DAG, Op.getOperand(1), KnownZero, KnownOne);
-    computeKnownBits(DAG, Op.getOperand(2), KZ2, KO2);
+    computeKnownBits(DAG, Op.getOperand(0), KnownZero, KnownOne);
+    computeKnownBits(DAG, Op.getOperand(1), KZ2, KO2);
 
     KnownZero &= KZ2;
     KnownOne &= KO2;
diff --git a/test/CodeGen/ARM/no-cmov2bfi.ll b/test/CodeGen/ARM/no-cmov2bfi.ll
new file mode 100644
index 000000000..c8b512048
--- /dev/null
+++ b/test/CodeGen/ARM/no-cmov2bfi.ll
@@ -0,0 +1,19 @@
+; RUN: llc < %s -mtriple=thumbv7 | FileCheck --check-prefix=CHECK-NOBFI %s
+
+declare zeroext i1 @dummy()
+
+define i8 @test(i8 %a1, i1 %c) {
+; CHECK-NOBFI-NOT: bfi
+; CHECK-NOBFI: bl      dummy
+; CHECK-NOBFI: cmp     r0, #0
+; CHECK-NOBFI: it      ne
+; CHECK-NOBFI: orrne   [[REG:r[0-9]+]], [[REG]], #8
+; CHECK-NOBFI: mov     r0, [[REG]]
+
+  %1 = and i8 %a1, -9
+  %2 = select i1 %c, i8 %1, i8 %a1
+  %3 = tail call zeroext i1 @dummy()
+  %4 = or i8 %2, 8
+  %ret = select i1 %3, i8 %4, i8 %2
+  ret i8 %ret
+}
-- 
2.30.2