[llvm] r284527 - GlobalISel: translate the @llvm.objectsize intrinsic.

[Tim Northover via llvm-commits]

Author: tnorthover
Date: Tue Oct 18 15:03:51 2016
New Revision: 284527

URL: http://llvm.org/viewvc/llvm-project?rev=284527&view=rev
Log:
GlobalISel: translate the @llvm.objectsize intrinsic.

Modified:
    llvm/trunk/lib/CodeGen/GlobalISel/IRTranslator.cpp
    llvm/trunk/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll

Modified: llvm/trunk/lib/CodeGen/GlobalISel/IRTranslator.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/GlobalISel/IRTranslator.cpp?rev=284527&r1=284526&r2=284527&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/GlobalISel/IRTranslator.cpp (original)
+++ llvm/trunk/lib/CodeGen/GlobalISel/IRTranslator.cpp Tue Oct 18 15:03:51 2016
@@ -392,6 +392,13 @@ bool IRTranslator::translateKnownIntrins
   case Intrinsic::smul_with_overflow: Op = TargetOpcode::G_SMULO; break;
   case Intrinsic::memcpy:
     return translateMemcpy(CI);
+  case Intrinsic::objectsize: {
+    // If we don't know by now, we're never going to know.
+    const ConstantInt *Min = cast<ConstantInt>(CI.getArgOperand(1));
+
+    MIRBuilder.buildConstant(getOrCreateVReg(CI), Min->isZero() ? -1ULL : 0);
+    return true;
+  }
   }
 
   LLT Ty{*CI.getOperand(0)->getType(), *DL};

Modified: llvm/trunk/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll?rev=284527&r1=284526&r2=284527&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll (original)
+++ llvm/trunk/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll Tue Oct 18 15:03:51 2016
@@ -881,3 +881,20 @@ define void @test_memcpy(i8* %dst, i8* %
   call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %src, i64 %size, i32 1, i1 0)
   ret void
 }
+
+declare i64 @llvm.objectsize.i64(i8*, i1)
+declare i32 @llvm.objectsize.i32(i8*, i1)
+define void @test_objectsize(i8* %addr0, i8* %addr1) {
+; CHECK-LABEL: name: test_objectsize
+; CHECK: [[ADDR0:%[0-9]+]](p0) = COPY %x0
+; CHECK: [[ADDR1:%[0-9]+]](p0) = COPY %x1
+; CHECK: {{%[0-9]+}}(s64) = G_CONSTANT -1
+; CHECK: {{%[0-9]+}}(s64) = G_CONSTANT 0
+; CHECK: {{%[0-9]+}}(s32) = G_CONSTANT -1
+; CHECK: {{%[0-9]+}}(s32) = G_CONSTANT 0
+  %size64.0 = call i64 @llvm.objectsize.i64(i8* %addr0, i1 0)
+  %size64.intmin = call i64 @llvm.objectsize.i64(i8* %addr0, i1 1)
+  %size32.0 = call i32 @llvm.objectsize.i32(i8* %addr0, i1 0)
+  %size32.intmin = call i32 @llvm.objectsize.i32(i8* %addr0, i1 1)
+  ret void
+}