[llvm] r275818 - [X86] Accept SELECT op code for x86-64 fp128 type

[Chih-Hung Hsieh via llvm-commits]

Author: chh
Date: Mon Jul 18 12:20:09 2016
New Revision: 275818

URL: http://llvm.org/viewvc/llvm-project?rev=275818&view=rev
Log:
[X86] Accept SELECT op code for x86-64 fp128 type

DAGTypeLegalizer::CanSkipSoftenFloatOperand should allow
SELECT op code for x86_64 fp128 type for MME targets,
so SoftenFloatOperand does not abort on SELECT op code.

Differential Revision: http://reviews.llvm.org/D21758

Added:
    llvm/trunk/test/CodeGen/X86/fp128-select.ll
Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp?rev=275818&r1=275817&r2=275818&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp Mon Jul 18 12:20:09 2016
@@ -816,6 +816,7 @@ bool DAGTypeLegalizer::CanSkipSoftenFloa
     case ISD::FCOPYSIGN:
     case ISD::FNEG:
     case ISD::Register:
+    case ISD::SELECT:
       return true;
   }
   return false;

Added: llvm/trunk/test/CodeGen/X86/fp128-select.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/fp128-select.ll?rev=275818&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/fp128-select.ll (added)
+++ llvm/trunk/test/CodeGen/X86/fp128-select.ll Mon Jul 18 12:20:09 2016
@@ -0,0 +1,35 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -O2 -mtriple=x86_64-linux-android -mattr=+mmx | FileCheck %s --check-prefix=MMX
+; RUN: llc < %s -O2 -mtriple=x86_64-linux-gnu -mattr=+mmx | FileCheck %s --check-prefix=MMX
+; RUN: llc < %s -O2 -mtriple=x86_64-linux-android | FileCheck %s
+; RUN: llc < %s -O2 -mtriple=x86_64-linux-gnu | FileCheck %s
+
+define void @test_select(fp128* %p, fp128* %q, i1 zeroext %c) {
+; MMX-LABEL: test_select:
+; MMX:       # BB#0:
+; MMX-NEXT:    testb %dl, %dl
+; MMX-NEXT:    jne .LBB0_1
+; MMX-NEXT:  # BB#2:
+; MMX-NEXT:    movaps {{.*}}(%rip), %xmm0
+; MMX-NEXT:    movaps %xmm0, (%rsi)
+; MMX-NEXT:    retq
+; MMX-NEXT:  .LBB0_1:
+; MMX-NEXT:    movaps (%rdi), %xmm0
+; MMX-NEXT:    movaps %xmm0, (%rsi)
+; MMX-NEXT:    retq
+;
+; CHECK-LABEL: test_select:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    xorl %eax, %eax
+; CHECK-NEXT:    testb %dl, %dl
+; CHECK-NEXT:    cmovneq (%rdi), %rax
+; CHECK-NEXT:    movabsq $9223231299366420480, %rcx # imm = 0x7FFF800000000000
+; CHECK-NEXT:    cmovneq 8(%rdi), %rcx
+; CHECK-NEXT:    movq %rcx, 8(%rsi)
+; CHECK-NEXT:    movq %rax, (%rsi)
+; CHECK-NEXT:    retq
+  %a = load fp128, fp128* %p, align 2
+  %r = select i1 %c, fp128 %a, fp128 0xL00000000000000007FFF800000000000
+  store fp128 %r, fp128* %q
+  ret void
+}