From: Craig Topper <craig.topper@intel.com>
Date: Wed, 30 Aug 2017 23:05:54 +0000 (+0000)
Subject: [X86] Remove some code from fast isel that is no longer needed with i1 being an illeg... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a678116cfb8402da77486060b47f4a0de9623852;p=llvm

[X86] Remove some code from fast isel that is no longer needed with i1 being an illegal type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312190 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp
index ef83cac3baf..3bdba662c5e 100644
--- a/lib/Target/X86/X86FastISel.cpp
+++ b/lib/Target/X86/X86FastISel.cpp
@@ -1237,16 +1237,6 @@ bool X86FastISel::X86SelectRet(const Instruction *I) {
       if (SrcVT == MVT::i1) {
         if (Outs[0].Flags.isSExt())
           return false;
-        // In case SrcReg is a K register, COPY to a GPR
-        if (MRI.getRegClass(SrcReg) == &X86::VK1RegClass) {
-          unsigned KSrcReg = SrcReg;
-          SrcReg = createResultReg(&X86::GR32RegClass);
-          BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
-                  TII.get(TargetOpcode::COPY), SrcReg)
-              .addReg(KSrcReg);
-          SrcReg = fastEmitInst_extractsubreg(MVT::i8, SrcReg, /*Kill=*/true,
-                                              X86::sub_8bit);
-        }
         SrcReg = fastEmitZExtFromI1(MVT::i8, SrcReg, /*TODO: Kill=*/false);
         SrcVT = MVT::i8;
       }
@@ -1538,17 +1528,6 @@ bool X86FastISel::X86SelectZExt(const Instruction *I) {
   // Handle zero-extension from i1 to i8, which is common.
   MVT SrcVT = TLI.getSimpleValueType(DL, I->getOperand(0)->getType());
   if (SrcVT == MVT::i1) {
-    // In case ResultReg is a K register, COPY to a GPR
-    if (MRI.getRegClass(ResultReg) == &X86::VK1RegClass) {
-      unsigned KResultReg = ResultReg;
-      ResultReg = createResultReg(&X86::GR32RegClass);
-      BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
-              TII.get(TargetOpcode::COPY), ResultReg)
-          .addReg(KResultReg);
-      ResultReg = fastEmitInst_extractsubreg(MVT::i8, ResultReg, /*Kill=*/true,
-                                             X86::sub_8bit);
-    }
-
     // Set the high bits to zero.
     ResultReg = fastEmitZExtFromI1(MVT::i8, ResultReg, /*TODO: Kill=*/false);
     SrcVT = MVT::i8;
@@ -3282,16 +3261,6 @@ bool X86FastISel::fastLowerCall(CallLoweringInfo &CLI) {
 
       // Handle zero-extension from i1 to i8, which is common.
       if (ArgVT == MVT::i1) {
-        // In case SrcReg is a K register, COPY to a GPR
-        if (MRI.getRegClass(ArgReg) == &X86::VK1RegClass) {
-          unsigned KArgReg = ArgReg;
-          ArgReg = createResultReg(&X86::GR32RegClass);
-          BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
-                  TII.get(TargetOpcode::COPY), ArgReg)
-              .addReg(KArgReg);
-          ArgReg = fastEmitInst_extractsubreg(MVT::i8, ArgReg, /*Kill=*/true,
-                                              X86::sub_8bit);
-        }
         // Set the high bits to zero.
         ArgReg = fastEmitZExtFromI1(MVT::i8, ArgReg, /*TODO: Kill=*/false);
         ArgVT = MVT::i8;