[GlobalIsel][X86] Support G_PTRTOINT instruction.

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

Reviewed By: igorb

Differential Revision: https://reviews.llvm.org/D43617

llvm-svn: 326311

1 files changed, 15 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86LegalizerInfo.cpp b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
index 56a096b0d44..050e5ef8b29 100644
--- a/llvm/lib/Target/X86/X86LegalizerInfo.cpp
+++ b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
@@ -124,6 +124,12 @@ void X86LegalizerInfo::setLegalizerInfo32bit() {
   setAction({G_GEP, p0}, Legal);
   setAction({G_GEP, 1, s32}, Legal);
 
+  if (!Subtarget.is64Bit())
+    getActionDefinitionsBuilder(G_PTRTOINT)
+        .legalForCartesianProduct({s1, s8, s16, s32}, {p0})
+        .maxScalar(0, s32)
+        .widenScalarToNextPow2(0, /*Min*/ 8);
+
   // Control-flow
   setAction({G_BRCOND, s1}, Legal);
 
@@ -161,6 +167,11 @@ void X86LegalizerInfo::setLegalizerInfo64bit() {
   if (!Subtarget.is64Bit())
     return;
 
+  const LLT p0 = LLT::pointer(0, TM.getPointerSize() * 8);
+  const LLT s1 = LLT::scalar(1);
+  const LLT s8 = LLT::scalar(8);
+  const LLT s16 = LLT::scalar(16);
+  const LLT s32 = LLT::scalar(32);
   const LLT s64 = LLT::scalar(64);
   const LLT s128 = LLT::scalar(128);
 
@@ -179,6 +190,10 @@ void X86LegalizerInfo::setLegalizerInfo64bit() {
 
   // Pointer-handling
   setAction({G_GEP, 1, s64}, Legal);
+  getActionDefinitionsBuilder(G_PTRTOINT)
+      .legalForCartesianProduct({s1, s8, s16, s32, s64}, {p0})
+      .maxScalar(0, s64)
+      .widenScalarToNextPow2(0, /*Min*/ 8);
 
   // Constants
   setAction({TargetOpcode::G_CONSTANT, s64}, Legal);