[SystemZ] Add conditional store patterns

Add pseudo conditional store instructions, so that we use:

    branch foo:
    store
foo:

instead of:

    load
    branch foo:
    move
foo:
    store

z196 has real 32-bit and 64-bit conditional stores, but we don't use
any z196 instructions yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185065 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/Target/SystemZ/SystemZInstrFP.td b/lib/Target/SystemZ/SystemZInstrFP.td
index 86ef14c..7499d2f 100644
--- a/lib/Target/SystemZ/SystemZInstrFP.td
+++ b/lib/Target/SystemZ/SystemZInstrFP.td
@@ -8,7 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 //===----------------------------------------------------------------------===//
-// Control-flow instructions
+// Select instructions
 //===----------------------------------------------------------------------===//
 
 // C's ?: operator for floating-point operands.
@@ -16,6 +16,11 @@ def SelectF32  : SelectWrapper<FP32>;
 def SelectF64  : SelectWrapper<FP64>;
 def SelectF128 : SelectWrapper<FP128>;
 
+defm CondStoreF32 : CondStores<FP32, nonvolatile_store,
+                               nonvolatile_load, bdxaddr20only>;
+defm CondStoreF64 : CondStores<FP64, nonvolatile_store,
+                               nonvolatile_load, bdxaddr20only>;
+
 //===----------------------------------------------------------------------===//
 // Move instructions
 //===----------------------------------------------------------------------===//