[GlobalIsel][X86] Support G_INTTOPTR instruction.

Add legalization/selection for x86/x86_64 and
corresponding tests.

Reviewed By: igorb

Differential Revision: https://reviews.llvm.org/D43622

llvm-svn: 326320

2 files changed, 6 insertions, 1 deletions

diff --git a/llvm/lib/Target/X86/X86InstructionSelector.cpp b/llvm/lib/Target/X86/X86InstructionSelector.cpp
index 67b31a828cb..afbf5d5e23d 100644
--- a/llvm/lib/Target/X86/X86InstructionSelector.cpp
+++ b/llvm/lib/Target/X86/X86InstructionSelector.cpp
@@ -350,6 +350,8 @@ bool X86InstructionSelector::select(MachineInstr &I,
   case TargetOpcode::G_PTRTOINT:
   case TargetOpcode::G_TRUNC:
     return selectTruncOrPtrToInt(I, MRI, MF);
+  case TargetOpcode::G_INTTOPTR:
+    return selectCopy(I, MRI);
   case TargetOpcode::G_ZEXT:
     return selectZext(I, MRI, MF);
   case TargetOpcode::G_ANYEXT:
diff --git a/llvm/lib/Target/X86/X86LegalizerInfo.cpp b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
index 050e5ef8b29..bcf0ffb1bdf 100644
--- a/llvm/lib/Target/X86/X86LegalizerInfo.cpp
+++ b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
@@ -124,11 +124,13 @@ void X86LegalizerInfo::setLegalizerInfo32bit() {
   setAction({G_GEP, p0}, Legal);
   setAction({G_GEP, 1, s32}, Legal);
 
-  if (!Subtarget.is64Bit())
+  if (!Subtarget.is64Bit()) {
     getActionDefinitionsBuilder(G_PTRTOINT)
         .legalForCartesianProduct({s1, s8, s16, s32}, {p0})
         .maxScalar(0, s32)
         .widenScalarToNextPow2(0, /*Min*/ 8);
+    getActionDefinitionsBuilder(G_INTTOPTR).legalFor({s32, p0});
+  }
 
   // Control-flow
   setAction({G_BRCOND, s1}, Legal);
@@ -194,6 +196,7 @@ void X86LegalizerInfo::setLegalizerInfo64bit() {
       .legalForCartesianProduct({s1, s8, s16, s32, s64}, {p0})
       .maxScalar(0, s64)
       .widenScalarToNextPow2(0, /*Min*/ 8);
+  getActionDefinitionsBuilder(G_INTTOPTR).legalFor({s64, p0});
 
   // Constants
   setAction({TargetOpcode::G_CONSTANT, s64}, Legal);