From: Krzysztof Parzyszek <kparzysz@codeaurora.org>
Date: Mon, 24 Jul 2017 19:35:48 +0000 (+0000)
Subject: [Hexagon] Recognize C4_cmpneqi, C4_cmpltei and C4_cmplteui in NewValueJump
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1aa3f8dfbc8b627f77f0717dfaeb8dd190cf3cb3;p=llvm

[Hexagon] Recognize C4_cmpneqi, C4_cmpltei and C4_cmplteui in NewValueJump


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308914 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/Hexagon/HexagonNewValueJump.cpp b/lib/Target/Hexagon/HexagonNewValueJump.cpp
index e93f075f4cc..eaa9d5fde04 100644
--- a/lib/Target/Hexagon/HexagonNewValueJump.cpp
+++ b/lib/Target/Hexagon/HexagonNewValueJump.cpp
@@ -173,7 +173,7 @@ static bool commonChecksToProhibitNewValueJump(bool afterRA,
                           MachineBasicBlock::iterator MII) {
 
   // If store in path, bail out.
-  if (MII->getDesc().mayStore())
+  if (MII->mayStore())
     return false;
 
   // if call in path, bail out.
@@ -227,10 +227,13 @@ static bool canCompareBeNewValueJump(const HexagonInstrInfo *QII,
 
     switch (MI.getOpcode()) {
       case Hexagon::C2_cmpeqi:
+      case Hexagon::C4_cmpneqi:
       case Hexagon::C2_cmpgti:
+      case Hexagon::C4_cmpltei:
         Valid = (isUInt<5>(v) || v == -1);
         break;
       case Hexagon::C2_cmpgtui:
+      case Hexagon::C4_cmplteui:
         Valid = isUInt<5>(v);
         break;
       case Hexagon::S2_tstbit_i:
@@ -328,6 +331,13 @@ static unsigned getNewValueJumpOpcode(MachineInstr *MI, int reg,
                      : Hexagon::J4_cmpeqn1_t_jumpnv_nt;
     }
 
+    case Hexagon::C4_cmpneqi:
+      if (reg >= 0)
+        return taken ? Hexagon::J4_cmpeqi_f_jumpnv_t
+                     : Hexagon::J4_cmpeqi_f_jumpnv_nt;
+      return taken ? Hexagon::J4_cmpeqn1_f_jumpnv_t :
+                     Hexagon::J4_cmpeqn1_f_jumpnv_nt;
+
     case Hexagon::C2_cmpgt: {
       if (secondRegNewified)
         return taken ? Hexagon::J4_cmplt_t_jumpnv_t
@@ -377,6 +387,17 @@ static unsigned getNewValueJumpOpcode(MachineInstr *MI, int reg,
       return taken ? Hexagon::J4_cmpgtu_f_jumpnv_t
                    : Hexagon::J4_cmpgtu_f_jumpnv_nt;
 
+    case Hexagon::C4_cmpltei:
+      if (reg >= 0)
+        return taken ? Hexagon::J4_cmpgti_f_jumpnv_t :
+                       Hexagon::J4_cmpgti_f_jumpnv_nt;
+      return taken ? Hexagon::J4_cmpgtn1_f_jumpnv_t :
+                     Hexagon::J4_cmpgtn1_f_jumpnv_nt;
+
+    case Hexagon::C4_cmplteui:
+      return taken ? Hexagon::J4_cmpgtui_f_jumpnv_t :
+                     Hexagon::J4_cmpgtui_f_jumpnv_nt;
+
     default:
        llvm_unreachable("Could not find matching New Value Jump instruction.");
   }
@@ -394,8 +415,11 @@ bool HexagonNewValueJump::isNewValueJumpCandidate(
   case Hexagon::C2_cmpgtu:
   case Hexagon::C2_cmpgtui:
   case Hexagon::C4_cmpneq:
+  case Hexagon::C4_cmpneqi:
   case Hexagon::C4_cmplte:
   case Hexagon::C4_cmplteu:
+  case Hexagon::C4_cmpltei:
+  case Hexagon::C4_cmplteui:
     return true;
 
   default:
diff --git a/test/CodeGen/Hexagon/newvaluejump-c4.mir b/test/CodeGen/Hexagon/newvaluejump-c4.mir
new file mode 100644
index 00000000000..1f6a46e2835
--- /dev/null
+++ b/test/CodeGen/Hexagon/newvaluejump-c4.mir
@@ -0,0 +1,48 @@
+# RUN: llc -march=hexagon -run-pass hexagon-nvj %s -o - | FileCheck %s
+
+---
+# CHECK-LABEL: name: test0
+# CHECK: J4_cmpeqi_f_jumpnv_t killed %r1, 0
+name: test0
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: %r0
+        %r1 = A2_addi %r0, -1
+        %p0 = C4_cmpneqi killed %r1, 0
+        J2_jumpt killed %p0, %bb.1, implicit-def %pc
+  bb.1:
+...
+
+---
+# CHECK-LABEL: name: test1
+# CHECK: J4_cmpgti_f_jumpnv_t killed %r1, 27
+name: test1
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: %r0
+        %r1 = A2_addi %r0, -1
+        %p0 = C4_cmpltei killed %r1, 27
+        J2_jumpt killed %p0, %bb.1, implicit-def %pc
+  bb.1:
+...
+
+---
+# CHECK-LABEL: name: test2
+# CHECK: J4_cmpgtui_f_jumpnv_t killed %r1, 31
+name: test2
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: %r0
+        %r1 = A2_addi %r0, -1
+        %p0 = C4_cmplteui killed %r1, 31
+        J2_jumpt killed %p0, %bb.1, implicit-def %pc
+  bb.1:
+...
+
+