Use MVN for ~t2_so_imm immediates.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74223 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index 2b633242f43dce3181466dabb834b9e2b640fdc7..3a44bbdbcc74acc2d0d50fb58d4f78fcb5b34774 100644 (file)
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -434,6 +434,9 @@ def : Thumb2Pat<(or      GPR:$src, t2_so_imm_not:$imm),
 
 defm t2MVN  : T2I_un_irs  <"mvn", UnOpFrag<(not node:$Src)>, 1, 1>;
 
+def : Thumb2Pat<(t2_so_imm_not:$src),
+                (t2MVNi t2_so_imm_not:$src)>;
+
 // A8.6.17  BFC - Bitfield clear
 // FIXME: Also available in ARM mode.
 let Constraints = "$src = $dst" in

diff --git a/test/CodeGen/Thumb2/thumb2-mvn.ll b/test/CodeGen/Thumb2/thumb2-mvn.ll
new file mode 100644 (file)
index 0000000..967e03f
--- /dev/null
+++ b/test/CodeGen/Thumb2/thumb2-mvn.ll
@@ -0,0 +1,27 @@
+; RUN: llvm-as < %s | llc | grep {mvn\\W*r\[0-9\],\\W*#\[0-9\]*} | grep {#187\\|#11141290\\|#3422604288\\|#1114112} | Count 4
+
+target triple = "thumbv7-apple-darwin"
+
+; 0x000000bb = 187
+define i32 @f1(i32 %a) {
+    %tmp = xor i32 4294967295, 187
+    ret i32 %tmp
+}
+
+; 0x00aa00aa = 11141290
+define i32 @f2(i32 %a) {
+    %tmp = xor i32 4294967295, 11141290 
+    ret i32 %tmp
+}
+
+; 0xcc00cc00 = 3422604288
+define i32 @f3(i32 %a) {
+    %tmp = xor i32 4294967295, 3422604288
+    ret i32 %tmp
+}
+
+; 0x00110000 = 1114112
+define i32 @f5(i32 %a) {
+    %tmp = xor i32 4294967295, 1114112
+    ret i32 %tmp
+}