[SystemZ] Add negative integer absolute (load negative)

For now this matches the equivalent of (neg (abs ...)), which did hit a few
times in projects/test-suite.  We should probably also match cases where
absolute-like selects are used with reversed arguments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188671 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/Target/SystemZ/SystemZInstrInfo.td b/lib/Target/SystemZ/SystemZInstrInfo.td
index dd3a9bc..d857a57 100644
--- a/lib/Target/SystemZ/SystemZInstrInfo.td
+++ b/lib/Target/SystemZ/SystemZInstrInfo.td
@@ -549,6 +549,16 @@ defm : SXU<z_iabs64, LPGFR>;
 
 let Defs = [CC] in {
   let CCValues = 0xF, CompareZeroCCMask = 0x8 in {
+    def LNR  : UnaryRR <"ln",  0x11,   z_inegabs32, GR32, GR32>;
+    def LNGR : UnaryRRE<"lng", 0xB901, z_inegabs64, GR64, GR64>;
+  }
+  let CCValues = 0xE, CompareZeroCCMask = 0xE in
+    def LNGFR : UnaryRRE<"lngf", 0xB911, null_frag, GR64, GR32>;
+}
+defm : SXU<z_inegabs64, LNGFR>;
+
+let Defs = [CC] in {
+  let CCValues = 0xF, CompareZeroCCMask = 0x8 in {
     def LCR  : UnaryRR <"lc",  0x13,   ineg, GR32, GR32>;
     def LCGR : UnaryRRE<"lcg", 0xB903, ineg, GR64, GR64>;
   }