[X86] [PATCH] [intrinsics] Lowering X86 ABS intrinsics to IR. (clang)
This patch, together with a matching llvm patch (https://reviews.llvm.org/D37693), implements the lowering of X86 ABS intrinsics to IR.
Differential Revision: https://reviews.llvm.org/D37694
llvm-svn: 313133
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index f80b259..971cecf 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -7331,6 +7331,18 @@
std::max(NumElts, 8U)));
}
+static Value *EmitX86Abs(CodeGenFunction &CGF, ArrayRef<Value *> Ops) {
+
+ llvm::Type *Ty = Ops[0]->getType();
+ Value *Zero = llvm::Constant::getNullValue(Ty);
+ Value *Sub = CGF.Builder.CreateSub(Zero, Ops[0]);
+ Value *Cmp = CGF.Builder.CreateICmp(ICmpInst::ICMP_SGT, Ops[0], Zero);
+ Value *Res = CGF.Builder.CreateSelect(Cmp, Ops[0], Sub);
+ if (Ops.size() == 1)
+ return Res;
+ return EmitX86Select(CGF, Ops[2], Res, Ops[1]);
+}
+
static Value *EmitX86MinMax(CodeGenFunction &CGF, ICmpInst::Predicate Pred,
ArrayRef<Value *> Ops) {
Value *Cmp = CGF.Builder.CreateICmp(Pred, Ops[0], Ops[1]);
@@ -8025,6 +8037,20 @@
Ops[1]);
}
+ case X86::BI__builtin_ia32_pabsb128:
+ case X86::BI__builtin_ia32_pabsw128:
+ case X86::BI__builtin_ia32_pabsd128:
+ case X86::BI__builtin_ia32_pabsb256:
+ case X86::BI__builtin_ia32_pabsw256:
+ case X86::BI__builtin_ia32_pabsd256:
+ case X86::BI__builtin_ia32_pabsq128_mask:
+ case X86::BI__builtin_ia32_pabsq256_mask:
+ case X86::BI__builtin_ia32_pabsb512_mask:
+ case X86::BI__builtin_ia32_pabsw512_mask:
+ case X86::BI__builtin_ia32_pabsd512_mask:
+ case X86::BI__builtin_ia32_pabsq512_mask:
+ return EmitX86Abs(*this, Ops);
+
case X86::BI__builtin_ia32_pmaxsb128:
case X86::BI__builtin_ia32_pmaxsw128:
case X86::BI__builtin_ia32_pmaxsd128: