Lower mem-ops to unaligned i32/i16 load/stores on ARM where supported.
Add support for trimming constants to GetDemandedBits. This fixes some funky
constant generation that occurs when stores are expanded for targets that don't
support unaligned stores natively.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144102 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 84a34d5..c51e7ae 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -8171,6 +8171,13 @@
}
}
+ // Lowering to i32/i16 if the size permits.
+ if (Size >= 4) {
+ return MVT::i32;
+ } else if (Size >= 2) {
+ return MVT::i16;
+ }
+
// Let the target-independent logic figure it out.
return MVT::Other;
}