[PATCH] D51353: [PowerPC] Optimize compares fed by ANDISo

[Nemanja Ivanovic via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL342472: [PowerPC] Optimize compares fed by ANDISo (authored by nemanjai, committed by ).

Changed prior to commit:
  https://reviews.llvm.org/D51353?vs=162841&id=165951#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D51353

Files:
  llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.cpp
  llvm/trunk/test/CodeGen/PowerPC/optimize-andiso.ll


Index: llvm/trunk/test/CodeGen/PowerPC/optimize-andiso.ll
===================================================================
--- llvm/trunk/test/CodeGen/PowerPC/optimize-andiso.ll
+++ llvm/trunk/test/CodeGen/PowerPC/optimize-andiso.ll
@@ -0,0 +1,44 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu \
+; RUN:   -mcpu=pwr8 -ppc-asm-full-reg-names < %s | FileCheck %s
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
+; RUN:   -mcpu=pwr8 -ppc-asm-full-reg-names < %s | FileCheck %s
+define float @floatundisf(i64 %a) {
+; CHECK-LABEL: floatundisf:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    bc 4, 4*cr5+lt, .LBB0_2
+; CHECK-NEXT:  # %bb.1:
+; CHECK-NEXT:    xxlxor f1, f1, f1
+; CHECK-NEXT:    blr
+; CHECK-NEXT:  .LBB0_2: # %sw.epilog
+; CHECK-NEXT:    addi r3, r3, 1
+; CHECK-NEXT:    li r5, 2
+; CHECK-NEXT:    andis. r4, r3, 1024
+; CHECK-NEXT:    li r4, 3
+; CHECK-NEXT:    isel r4, r5, r4, eq
+; CHECK-NEXT:    srd r3, r3, r4
+; CHECK-NEXT:    rlwinm r3, r3, 0, 9, 31
+; CHECK-NEXT:    mtvsrd f0, r3
+; CHECK-NEXT:    xxsldwi vs0, vs0, vs0, 1
+; CHECK-NEXT:    xscvspdpn f1, vs0
+; CHECK-NEXT:    blr
+entry:
+  br i1 undef, label %return, label %sw.epilog
+
+sw.epilog:                                        ; preds = %entry
+  %or14 = or i64 0, %a
+  %inc = add i64 %or14, 1
+  %and16 = and i64 %inc, 67108864
+  %tobool = icmp eq i64 %and16, 0
+  %tmp.select.v = select i1 %tobool, i64 2, i64 3
+  %tmp.select = lshr i64 %inc, %tmp.select.v
+  %conv26 = trunc i64 %tmp.select to i32
+  %and27 = and i32 %conv26, 8388607
+  %or28 = or i32 0, %and27
+  %0 = bitcast i32 %or28 to float
+  br label %return
+
+return:                                           ; preds = %sw.epilog, %entry
+  %retval.0 = phi float [ %0, %sw.epilog ], [ 0.000000e+00, %entry ]
+  ret float %retval.0
+}
Index: llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.cpp
===================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -1822,7 +1822,8 @@
 
   int NewOpC = -1;
   int MIOpC = MI->getOpcode();
-  if (MIOpC == PPC::ANDIo || MIOpC == PPC::ANDIo8)
+  if (MIOpC == PPC::ANDIo || MIOpC == PPC::ANDIo8 ||
+      MIOpC == PPC::ANDISo || MIOpC == PPC::ANDISo8)
     NewOpC = MIOpC;
   else {
     NewOpC = PPC::getRecordFormOpcode(MIOpC);


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