[clang] [llvm] [HLSL] implement the `isinf` intrinsic (PR #84927)
Farzon Lotfi via cfe-commits
cfe-commits at lists.llvm.org
Thu Mar 14 12:51:21 PDT 2024
https://github.com/farzonl updated https://github.com/llvm/llvm-project/pull/84927
>From b21e8806ccc559d4326e26432cdce8ba13dc0984 Mon Sep 17 00:00:00 2001
From: Farzon Lotfi <farzonlotfi at microsoft.com>
Date: Mon, 11 Mar 2024 15:28:49 -0400
Subject: [PATCH 1/2] [HLSL] implement the `isinf` intrinsic This change
implements part 1 of 2 for #70095 - `hlsl_intrinsics.h - add the `isinf` api
- `Builtins.td` - add an hlsl builtin for `isinf`. - `CGBuiltin.cpp` add the
ir generation for `isinf` intrinsic. - `SemaChecking.cpp` - add a non-math
elementwise checks because this is a bool return. - `IntrinsicsDirectX.td -
add an `isinf` intrinsic.
DXIL.td lowering is left, but changes need to be made there before we
can support this case.
---
clang/include/clang/Basic/Builtins.td | 6 +++
clang/lib/CodeGen/CGBuiltin.cpp | 15 +++++++
clang/lib/Headers/hlsl/hlsl_intrinsics.h | 33 ++++++++++++++
clang/lib/Sema/SemaChecking.cpp | 16 +++++++
clang/test/CodeGenHLSL/builtins/isinf.hlsl | 45 +++++++++++++++++++
.../test/SemaHLSL/BuiltIns/isinf-errors.hlsl | 27 +++++++++++
llvm/include/llvm/IR/IntrinsicsDirectX.td | 4 ++
7 files changed, 146 insertions(+)
create mode 100644 clang/test/CodeGenHLSL/builtins/isinf.hlsl
create mode 100644 clang/test/SemaHLSL/BuiltIns/isinf-errors.hlsl
diff --git a/clang/include/clang/Basic/Builtins.td b/clang/include/clang/Basic/Builtins.td
index 9c703377ca8d3e..b3376b316cd222 100644
--- a/clang/include/clang/Basic/Builtins.td
+++ b/clang/include/clang/Basic/Builtins.td
@@ -4572,6 +4572,12 @@ def HLSLFrac : LangBuiltin<"HLSL_LANG"> {
let Prototype = "void(...)";
}
+def HLSLIsinf : LangBuiltin<"HLSL_LANG"> {
+ let Spellings = ["__builtin_hlsl_elementwise_isinf"];
+ let Attributes = [NoThrow, Const];
+ let Prototype = "void(...)";
+}
+
def HLSLLerp : LangBuiltin<"HLSL_LANG"> {
let Spellings = ["__builtin_hlsl_lerp"];
let Attributes = [NoThrow, Const];
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 528a13fb275124..0d55322c275f41 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -18062,6 +18062,21 @@ Value *CodeGenFunction::EmitHLSLBuiltinExpr(unsigned BuiltinID,
/*ReturnType=*/Op0->getType(), Intrinsic::dx_frac,
ArrayRef<Value *>{Op0}, nullptr, "dx.frac");
}
+ case Builtin::BI__builtin_hlsl_elementwise_isinf: {
+ Value *Op0 = EmitScalarExpr(E->getArg(0));
+ llvm::Type *Xty = Op0->getType();
+ llvm::Type *retType = llvm::Type::getInt1Ty(this->getLLVMContext());
+ if (Xty->isVectorTy()) {
+ auto *XVecTy = E->getArg(0)->getType()->getAs<VectorType>();
+ retType = llvm::VectorType::get(
+ retType, ElementCount::getFixed(XVecTy->getNumElements()));
+ }
+ if (!E->getArg(0)->getType()->hasFloatingRepresentation())
+ llvm_unreachable("isinf operand must have a float representation");
+ return Builder.CreateIntrinsic(
+ /*ReturnType=*/retType, Intrinsic::dx_isinf, ArrayRef<Value *>{Op0},
+ nullptr, "dx.isinf");
+ }
case Builtin::BI__builtin_hlsl_mad: {
Value *M = EmitScalarExpr(E->getArg(0));
Value *A = EmitScalarExpr(E->getArg(1));
diff --git a/clang/lib/Headers/hlsl/hlsl_intrinsics.h b/clang/lib/Headers/hlsl/hlsl_intrinsics.h
index 45f8544392584e..2c3ab46d959137 100644
--- a/clang/lib/Headers/hlsl/hlsl_intrinsics.h
+++ b/clang/lib/Headers/hlsl/hlsl_intrinsics.h
@@ -525,6 +525,39 @@ float3 frac(float3);
_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_frac)
float4 frac(float4);
+//===----------------------------------------------------------------------===//
+// isinf builtins
+//===----------------------------------------------------------------------===//
+
+/// \fn T isinf(T x)
+/// \brief Determines if the specified value \a x is infinite.
+/// \param x The specified input value.
+///
+/// Returns a value of the same size as the input, with a value set
+/// to True if the x parameter is +INF or -INF. Otherwise, False.
+
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_isinf)
+bool isinf(half);
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_isinf)
+bool2 isinf(half2);
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_isinf)
+bool3 isinf(half3);
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_isinf)
+bool4 isinf(half4);
+
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_isinf)
+bool isinf(float);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_isinf)
+bool2 isinf(float2);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_isinf)
+bool3 isinf(float3);
+_HLSL_BUILTIN_ALIAS(__builtin_hlsl_elementwise_isinf)
+bool4 isinf(float4);
+
//===----------------------------------------------------------------------===//
// lerp builtins
//===----------------------------------------------------------------------===//
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 124fb2b65438b5..e568544a018a4d 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -5268,6 +5268,15 @@ bool CheckAllArgsHaveFloatRepresentation(Sema *S, CallExpr *TheCall) {
return false;
}
+void SetInputRepresentationReturnType(Sema *S, CallExpr *TheCall,
+ QualType ReturnType) {
+ auto *VecTyA = TheCall->getArg(0)->getType()->getAs<VectorType>();
+ if (VecTyA)
+ ReturnType = S->Context.getVectorType(ReturnType, VecTyA->getNumElements(),
+ VectorKind::Generic);
+ TheCall->setType(ReturnType);
+}
+
// Note: returning true in this case results in CheckBuiltinFunctionCall
// returning an ExprError
bool Sema::CheckHLSLBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
@@ -5286,6 +5295,13 @@ bool Sema::CheckHLSLBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
return true;
break;
}
+ case Builtin::BI__builtin_hlsl_elementwise_isinf:
+ if (checkArgCount(*this, TheCall, 1))
+ return true;
+ if (CheckAllArgsHaveFloatRepresentation(this, TheCall))
+ return true;
+ SetInputRepresentationReturnType(this, TheCall, this->Context.BoolTy);
+ break;
case Builtin::BI__builtin_hlsl_elementwise_rcp:
case Builtin::BI__builtin_hlsl_elementwise_frac: {
if (PrepareBuiltinElementwiseMathOneArgCall(TheCall))
diff --git a/clang/test/CodeGenHLSL/builtins/isinf.hlsl b/clang/test/CodeGenHLSL/builtins/isinf.hlsl
new file mode 100644
index 00000000000000..df44fc4a91dfd0
--- /dev/null
+++ b/clang/test/CodeGenHLSL/builtins/isinf.hlsl
@@ -0,0 +1,45 @@
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
+// RUN: dxil-pc-shadermodel6.3-library %s -fnative-half-type \
+// RUN: -emit-llvm -disable-llvm-passes -o - | FileCheck %s \
+// RUN: --check-prefixes=CHECK,NATIVE_HALF
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
+// RUN: dxil-pc-shadermodel6.3-library %s -emit-llvm -disable-llvm-passes \
+// RUN: -o - | FileCheck %s --check-prefixes=CHECK,NO_HALF
+
+// CHECK: define noundef i1 @
+// NATIVE_HALF: %dx.isinf = call i1 @llvm.dx.isinf.f16(
+// NO_HALF: %dx.isinf = call i1 @llvm.dx.isinf.f32(
+// CHECK: ret i1 %dx.isinf
+bool test_isinf_half(half p0) { return isinf(p0); }
+// CHECK: define noundef <2 x i1> @
+// NATIVE_HALF: %dx.isinf = call <2 x i1> @llvm.dx.isinf.v2f16
+// NO_HALF: %dx.isinf = call <2 x i1> @llvm.dx.isinf.v2f32(
+// CHECK: ret <2 x i1> %dx.isinf
+bool2 test_isinf_half2(half2 p0) { return isinf(p0); }
+// NATIVE_HALF: define noundef <3 x i1> @
+// NATIVE_HALF: %dx.isinf = call <3 x i1> @llvm.dx.isinf.v3f16
+// NO_HALF: %dx.isinf = call <3 x i1> @llvm.dx.isinf.v3f32(
+// CHECK: ret <3 x i1> %dx.isinf
+bool3 test_isinf_half3(half3 p0) { return isinf(p0); }
+// NATIVE_HALF: define noundef <4 x i1> @
+// NATIVE_HALF: %dx.isinf = call <4 x i1> @llvm.dx.isinf.v4f16
+// NO_HALF: %dx.isinf = call <4 x i1> @llvm.dx.isinf.v4f32(
+// CHECK: ret <4 x i1> %dx.isinf
+bool4 test_isinf_half4(half4 p0) { return isinf(p0); }
+
+// CHECK: define noundef i1 @
+// CHECK: %dx.isinf = call i1 @llvm.dx.isinf.f32(
+// CHECK: ret i1 %dx.isinf
+bool test_isinf_float(float p0) { return isinf(p0); }
+// CHECK: define noundef <2 x i1> @
+// CHECK: %dx.isinf = call <2 x i1> @llvm.dx.isinf.v2f32
+// CHECK: ret <2 x i1> %dx.isinf
+bool2 test_isinf_float2(float2 p0) { return isinf(p0); }
+// CHECK: define noundef <3 x i1> @
+// CHECK: %dx.isinf = call <3 x i1> @llvm.dx.isinf.v3f32
+// CHECK: ret <3 x i1> %dx.isinf
+bool3 test_isinf_float3(float3 p0) { return isinf(p0); }
+// CHECK: define noundef <4 x i1> @
+// CHECK: %dx.isinf = call <4 x i1> @llvm.dx.isinf.v4f32
+// CHECK: ret <4 x i1> %dx.isinf
+bool4 test_isinf_float4(float4 p0) { return isinf(p0); }
diff --git a/clang/test/SemaHLSL/BuiltIns/isinf-errors.hlsl b/clang/test/SemaHLSL/BuiltIns/isinf-errors.hlsl
new file mode 100644
index 00000000000000..12c273764c2556
--- /dev/null
+++ b/clang/test/SemaHLSL/BuiltIns/isinf-errors.hlsl
@@ -0,0 +1,27 @@
+
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.6-library %s -fnative-half-type -emit-llvm -disable-llvm-passes -verify -verify-ignore-unexpected
+
+bool test_too_few_arg() {
+ return __builtin_hlsl_elementwise_isinf();
+ // expected-error at -1 {{too few arguments to function call, expected 1, have 0}}
+}
+
+bool2 test_too_many_arg(float2 p0) {
+ return __builtin_hlsl_elementwise_isinf(p0, p0);
+ // expected-error at -1 {{too many arguments to function call, expected 1, have 2}}
+}
+
+bool builtin_bool_to_float_type_promotion(bool p1) {
+ return __builtin_hlsl_elementwise_isinf(p1);
+ // expected-error at -1 {{1st argument must be a vector, integer or floating point type (was 'bool')}}
+}
+
+bool builtin_isinf_int_to_float_promotion(int p1) {
+ return __builtin_hlsl_elementwise_isinf(p1);
+ // expected-error at -1 {{passing 'int' to parameter of incompatible type 'float'}}
+}
+
+bool2 builtin_isinf_int2_to_float2_promotion(int2 p1) {
+ return __builtin_hlsl_elementwise_isinf(p1);
+ // expected-error at -1 {{passing 'int2' (aka 'vector<int, 2>') to parameter of incompatible type '__attribute__((__vector_size__(2 * sizeof(float)))) float' (vector of 2 'float' values)}}
+}
diff --git a/llvm/include/llvm/IR/IntrinsicsDirectX.td b/llvm/include/llvm/IR/IntrinsicsDirectX.td
index 7229292e377a83..33a663c516256f 100644
--- a/llvm/include/llvm/IR/IntrinsicsDirectX.td
+++ b/llvm/include/llvm/IR/IntrinsicsDirectX.td
@@ -29,6 +29,10 @@ def int_dx_dot :
def int_dx_frac : DefaultAttrsIntrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
+def int_dx_isinf :
+ DefaultAttrsIntrinsic<[LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>],
+ [llvm_anyfloat_ty]>;
+
def int_dx_lerp :
Intrinsic<[LLVMScalarOrSameVectorWidth<0, LLVMVectorElementType<0>>],
[llvm_anyvector_ty, LLVMScalarOrSameVectorWidth<0, LLVMVectorElementType<0>>,LLVMScalarOrSameVectorWidth<0, LLVMVectorElementType<0>>],
>From f5c26f5ce566b33e009dde27caf8d723432e8b34 Mon Sep 17 00:00:00 2001
From: Farzon Lotfi <farzonlotfi at microsoft.com>
Date: Thu, 14 Mar 2024 15:36:28 -0400
Subject: [PATCH 2/2] address pr comments
---
clang/lib/CodeGen/CGBuiltin.cpp | 3 +--
clang/lib/Sema/SemaChecking.cpp | 4 ++--
2 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 0d55322c275f41..65dba66e907af5 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -18073,8 +18073,7 @@ Value *CodeGenFunction::EmitHLSLBuiltinExpr(unsigned BuiltinID,
}
if (!E->getArg(0)->getType()->hasFloatingRepresentation())
llvm_unreachable("isinf operand must have a float representation");
- return Builder.CreateIntrinsic(
- /*ReturnType=*/retType, Intrinsic::dx_isinf, ArrayRef<Value *>{Op0},
+ return Builder.CreateIntrinsic(retType, Intrinsic::dx_isinf, ArrayRef<Value *>{Op0},
nullptr, "dx.isinf");
}
case Builtin::BI__builtin_hlsl_mad: {
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index e568544a018a4d..0fe0b151c795cc 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -5268,7 +5268,7 @@ bool CheckAllArgsHaveFloatRepresentation(Sema *S, CallExpr *TheCall) {
return false;
}
-void SetInputRepresentationReturnType(Sema *S, CallExpr *TheCall,
+void SetElementTypeAsReturnType(Sema *S, CallExpr *TheCall,
QualType ReturnType) {
auto *VecTyA = TheCall->getArg(0)->getType()->getAs<VectorType>();
if (VecTyA)
@@ -5300,7 +5300,7 @@ bool Sema::CheckHLSLBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
return true;
if (CheckAllArgsHaveFloatRepresentation(this, TheCall))
return true;
- SetInputRepresentationReturnType(this, TheCall, this->Context.BoolTy);
+ SetElementTypeAsReturnType(this, TheCall, this->Context.BoolTy);
break;
case Builtin::BI__builtin_hlsl_elementwise_rcp:
case Builtin::BI__builtin_hlsl_elementwise_frac: {
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