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llvm-project/clang/test/CodeGenHLSL/BasicFeatures/StructElementwiseCast.hlsl
Sarah Spall 35c57a778b
[HLSL] Add support for elementwise and aggregate splat casting struct types with bitfields (#161263) 
Adds support for elementwise and aggregate splat casting struct types
with bitfields. Replacing existing Flattening function which used to
produce a list of GEPs representing a flattened object with one that
produces a list of LValues representing a flattened object. The LValues
can be used by EmitStoreThroughLValue and EmitLoadOfLValue, ensuring
bitfields are properly loaded and stored. This also simplifies the code
in the elementwise and aggregate splat casting functions.
Closes #125986
2025-10-06 08:26:23 -07:00

346 lines
16 KiB
HLSL
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// RUN: %clang_cc1 -finclude-default-header -fnative-half-type -triple dxil-pc-shadermodel6.3-library -x hlsl -emit-llvm -disable-llvm-passes -o - %s | FileCheck %s
struct S {
int X;
float Y;
};
// struct truncation to a scalar
// CHECK-LABEL: define void {{.*}}call0
// CHECK: [[s:%.*]] = alloca %struct.S, align 1
// CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[Tmp:%.*]] = alloca %struct.S, align 1
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[s]], ptr align 1 {{.*}}, i32 8, i1 false)
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[Tmp]], ptr align 1 [[s]], i32 8, i1 false)
// CHECK-NEXT: [[G1:%.*]] = getelementptr inbounds %struct.S, ptr [[Tmp]], i32 0, i32 0
// CHECK-NEXT: [[G2:%.*]] = getelementptr inbounds %struct.S, ptr [[Tmp]], i32 0, i32 1
// CHECK-NEXT: [[L:%.*]] = load i32, ptr [[G1]], align 4
// CHECK-NEXT: store i32 [[L]], ptr [[A]], align 4
export void call0() {
S s = {1,2};
int A = (int)s;
}
// struct from vector
// CHECK-LABEL: define void {{.*}}call1
// CHECK: [[A:%.*]] = alloca <2 x i32>, align 8
// CHECK-NEXT: [[s:%.*]] = alloca %struct.S, align 1
// CHECK-NEXT: store <2 x i32> <i32 1, i32 2>, ptr [[A]], align 8
// CHECK-NEXT: [[L:%.*]] = load <2 x i32>, ptr [[A]], align 8
// CHECK-NEXT: [[G1:%.*]] = getelementptr inbounds %struct.S, ptr [[s]], i32 0, i32 0
// CHECK-NEXT: [[G2:%.*]] = getelementptr inbounds %struct.S, ptr [[s]], i32 0, i32 1
// CHECK-NEXT: [[VL:%.*]] = extractelement <2 x i32> [[L]], i64 0
// CHECK-NEXT: store i32 [[VL]], ptr [[G1]], align 4
// CHECK-NEXT: [[VL2:%.*]] = extractelement <2 x i32> [[L]], i64 1
// CHECK-NEXT: [[C:%.*]] = sitofp i32 [[VL2]] to float
// CHECK-NEXT: store float [[C]], ptr [[G2]], align 4
export void call1() {
int2 A = {1,2};
S s = (S)A;
}
// struct from array
// CHECK-LABEL: define void {{.*}}call2
// CHECK: [[A:%.*]] = alloca [2 x i32], align 4
// CHECK-NEXT: [[s:%.*]] = alloca %struct.S, align 1
// CHECK-NEXT: [[Tmp:%.*]] = alloca [2 x i32], align 4
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[A]], ptr align 4 {{.*}}, i32 8, i1 false)
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Tmp]], ptr align 4 [[A]], i32 8, i1 false)
// CHECK-NEXT: [[G1:%.*]] = getelementptr inbounds %struct.S, ptr [[s]], i32 0, i32 0
// CHECK-NEXT: [[G2:%.*]] = getelementptr inbounds %struct.S, ptr [[s]], i32 0, i32 1
// CHECK-NEXT: [[G3:%.*]] = getelementptr inbounds [2 x i32], ptr [[Tmp]], i32 0, i32 0
// CHECK-NEXT: [[G4:%.*]] = getelementptr inbounds [2 x i32], ptr [[Tmp]], i32 0, i32 1
// CHECK-NEXT: [[L:%.*]] = load i32, ptr [[G3]], align 4
// CHECK-NEXT: store i32 [[L]], ptr [[G1]], align 4
// CHECK-NEXT: [[L4:%.*]] = load i32, ptr [[G4]], align 4
// CHECK-NEXT: [[C:%.*]] = sitofp i32 [[L4]] to float
// CHECK-NEXT: store float [[C]], ptr [[G2]], align 4
export void call2() {
int A[2] = {1,2};
S s = (S)A;
}
struct Q {
int Z;
};
struct R {
Q q;
float F;
};
// struct from nested struct?
// CHECK-LABEL: define void {{.*}}call6
// CHECK: [[r:%.*]] = alloca %struct.R, align 1
// CHECK-NEXT: [[s:%.*]] = alloca %struct.S, align 1
// CHECK-NEXT: [[Tmp:%.*]] = alloca %struct.R, align 1
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[r]], ptr align 1 {{.*}}, i32 8, i1 false)
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[Tmp]], ptr align 1 [[r]], i32 8, i1 false)
// CHECK-NEXT: [[G1:%.*]] = getelementptr inbounds %struct.S, ptr [[s]], i32 0, i32 0
// CHECK-NEXT: [[G2:%.*]] = getelementptr inbounds %struct.S, ptr [[s]], i32 0, i32 1
// CHECK-NEXT: [[G3:%.*]] = getelementptr inbounds %struct.R, ptr [[Tmp]], i32 0, i32 0
// CHECK-NEXT: [[G4:%.*]] = getelementptr inbounds %struct.R, ptr [[Tmp]], i32 0, i32 1
// CHECK-NEXT: [[L:%.*]] = load i32, ptr [[G3]], align 4
// CHECK-NEXT: store i32 [[L]], ptr [[G1]], align 4
// CHECK-NEXT: [[L4:%.*]] = load float, ptr [[G4]], align 4
// CHECK-NEXT: store float [[L4]], ptr [[G2]], align 4
export void call6() {
R r = {{1}, 2.0};
S s = (S)r;
}
// nested struct from array?
// CHECK-LABEL: define void {{.*}}call7
// CHECK: [[A:%.*]] = alloca [2 x i32], align 4
// CHECK-NEXT: [[r:%.*]] = alloca %struct.R, align 1
// CHECK-NEXT: [[Tmp:%.*]] = alloca [2 x i32], align 4
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[A]], ptr align 4 {{.*}}, i32 8, i1 false)
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Tmp]], ptr align 4 [[A]], i32 8, i1 false)
// CHECK-NEXT: [[G1:%.*]] = getelementptr inbounds %struct.R, ptr [[r]], i32 0, i32 0
// CHECK-NEXT: [[G2:%.*]] = getelementptr inbounds %struct.R, ptr [[r]], i32 0, i32 1
// CHECK-NEXT: [[G3:%.*]] = getelementptr inbounds [2 x i32], ptr [[Tmp]], i32 0, i32 0
// CHECK-NEXT: [[G4:%.*]] = getelementptr inbounds [2 x i32], ptr [[Tmp]], i32 0, i32 1
// CHECK-NEXT: [[L:%.*]] = load i32, ptr [[G3]], align 4
// CHECK-NEXT: store i32 [[L]], ptr [[G1]], align 4
// CHECK-NEXT: [[L4:%.*]] = load i32, ptr [[G4]], align 4
// CHECK-NEXT: [[C:%.*]] = sitofp i32 [[L4]] to float
// CHECK-NEXT: store float [[C]], ptr [[G2]], align 4
export void call7() {
int A[2] = {1,2};
R r = (R)A;
}
struct T {
int A;
int B;
int C;
};
// struct truncation
// CHECK-LABEL: define void {{.*}}call8
// CHECK: [[t:%.*]] = alloca %struct.T, align 1
// CHECK-NEXT: [[s:%.*]] = alloca %struct.S, align 1
// CHECK-NEXT: [[Tmp:%.*]] = alloca %struct.T, align 1
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[t]], ptr align 1 {{.*}}, i32 12, i1 false)
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[Tmp]], ptr align 1 [[t]], i32 12, i1 false)
// CHECK-NEXT: [[G1:%.*]] = getelementptr inbounds %struct.S, ptr [[s]], i32 0, i32 0
// CHECK-NEXT: [[G2:%.*]] = getelementptr inbounds %struct.S, ptr [[s]], i32 0, i32 1
// CHECK-NEXT: [[G3:%.*]] = getelementptr inbounds %struct.T, ptr [[Tmp]], i32 0, i32 0
// CHECK-NEXT: [[G4:%.*]] = getelementptr inbounds %struct.T, ptr %agg-temp, i32 0, i32 1
// CHECK-NEXT: [[G5:%.*]] = getelementptr inbounds %struct.T, ptr %agg-temp, i32 0, i32 2
// CHECK-NEXT: [[L1:%.*]] = load i32, ptr [[G3]], align 4
// CHECK-NEXT: store i32 [[L1]], ptr [[G1]], align 4
// CHECK-NEXT: [[L2:%.*]] = load i32, ptr [[G4]], align 4
// CHECK-NEXT: [[C:%.*]] = sitofp i32 [[L2]] to float
// CHECK-NEXT: store float [[C]], ptr [[G2]], align 4
export void call8() {
T t = {1,2,3};
S s = (S)t;
}
struct BFields {
double D;
int E: 15;
int : 8;
float F;
};
struct Derived : BFields {
int G;
};
// Derived Struct truncate to scalar
// CHECK-LABEL: call9
// CHECK: [[D2:%.*]] = alloca double, align 8
// CHECK-NEXT: [[Tmp:%.*]] = alloca %struct.Derived, align 1
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[Tmp]], ptr align 1 %D, i32 19, i1 false)
// CHECK-NEXT: [[Gep:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0
// CHECK-NEXT: [[E:%.*]] = getelementptr inbounds nuw %struct.BFields, ptr [[Gep]], i32 0, i32 1
// CHECK-NEXT: [[Gep1:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 0
// CHECK-NEXT: [[Gep2:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 2
// CHECK-NEXT: [[Gep3:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 1
// CHECK-NEXT: [[A:%.*]] = load double, ptr [[Gep1]], align 8
// CHECK-NEXT: store double [[A]], ptr [[D2]], align 8
// CHECK-NEXT: ret void
export void call9(Derived D) {
double D2 = (double)D;
}
// Derived struct from vector
// CHECK-LABEL: call10
// CHECK: [[IAddr:%.*]] = alloca <4 x i32>, align 16
// CHECK-NEXT: [[D:%.*]] = alloca %struct.Derived, align 1
// CHECK-NEXT: store <4 x i32> %I, ptr [[IAddr]], align 16
// CHECK-NEXT: [[A:%.*]] = load <4 x i32>, ptr [[IAddr]], align 16
// CHECK-NEXT: [[Gep:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 0
// CHECK-NEXT: [[E:%.*]] = getelementptr inbounds nuw %struct.BFields, ptr [[Gep]], i32 0, i32 1
// CHECK-NEXT: [[Gep1:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 0, i32 0
// CHECK-NEXT: [[Gep2:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 0, i32 2
// CHECK-NEXT: [[Gep3:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 1
// CHECK-NEXT: [[VL:%.*]] = extractelement <4 x i32> [[A]], i64 0
// CHECK-NEXT: [[C:%.*]] = sitofp i32 [[VL]] to double
// CHECK-NEXT: store double [[C]], ptr [[Gep1]], align 8
// CHECK-NEXT: [[VL4:%.*]] = extractelement <4 x i32> [[A]], i64 1
// CHECK-NEXT: [[B:%.*]] = trunc i32 [[VL4]] to i24
// CHECK-NEXT: [[BFL:%.*]] = load i24, ptr [[E]], align 1
// CHECK-NEXT: [[BFV:%.*]] = and i24 [[B]], 32767
// CHECK-NEXT: [[BFC:%.*]] = and i24 [[BFL]], -32768
// CHECK-NEXT: [[BFSet:%.*]] = or i24 [[BFC]], [[BFV]]
// CHECK-NEXT: store i24 [[BFSet]], ptr [[E]], align 1
// CHECK-NEXT: [[VL5:%.*]] = extractelement <4 x i32> [[A]], i64 2
// CHECK-NEXT: [[C6:%.*]] = sitofp i32 [[VL5]] to float
// CHECK-NEXT: store float [[C6]], ptr [[Gep2]], align 4
// CHECK-NEXT: [[VL7:%.*]] = extractelement <4 x i32> [[A]], i64 3
// CHECK-NEXT: store i32 [[VL7]], ptr [[Gep3]], align 4
// CHECK-NEXT: ret void
export void call10(int4 I) {
Derived D = (Derived)I;
}
// truncate derived struct
// CHECK-LABEL: call11
// CHECK: [[B:%.*]] = alloca %struct.BFields, align 1
// CHECK-NEXT: [[Tmp:%.*]] = alloca %struct.Derived, align 1
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[Tmp]], ptr align 1 [[D]], i32 19, i1 false)
// CHECK-NEXT: [[Gep:%.*]] = getelementptr inbounds %struct.BFields, ptr [[B]], i32 0
// CHECK-NEXT: [[E:%.*]] = getelementptr inbounds nuw %struct.BFields, ptr [[Gep]], i32 0, i32 1
// CHECK-NEXT: [[Gep1:%.*]] = getelementptr inbounds %struct.BFields, ptr [[B]], i32 0, i32 0
// CHECK-NEXT: [[Gep2:%.*]] = getelementptr inbounds %struct.BFields, ptr [[B]], i32 0, i32 2
// CHECK-NEXT: [[Gep3:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0
// CHECK-NEXT: [[E4:%.*]] = getelementptr inbounds nuw %struct.BFields, ptr [[Gep3]], i32 0, i32 1
// CHECK-NEXT: [[Gep5:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 0
// CHECK-NEXT: [[Gep6:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 2
// CHECK-NEXT: [[Gep7:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 1
// CHECK-NEXT: [[A:%.*]] = load double, ptr [[Gep5]], align 8
// CHECK-NEXT: store double [[A]], ptr [[Gep1]], align 8
// CHECK-NEXT: [[BFl:%.*]] = load i24, ptr [[E4]], align 1
// CHECK-NEXT: [[Shl:%.*]] = shl i24 [[BFL]], 9
// CHECK-NEXT: [[Ashr:%.*]] = ashr i24 [[Shl]], 9
// CHECK-NEXT: [[BFC:%.*]] = sext i24 [[Ashr]] to i32
// CHECK-NEXT: [[B:%.*]] = trunc i32 [[BFC]] to i24
// CHECK-NEXT: [[BFL8:%.*]] = load i24, ptr [[E]], align 1
// CHECK-NEXT: [[BFV:%.*]] = and i24 [[B]], 32767
// CHECK-NEXT: [[BFC:%.*]] = and i24 [[BFL8]], -32768
// CHECK-NEXT: [[BFSet:%.*]] = or i24 [[BFC]], [[BFV]]
// CHECK-NEXT: store i24 [[BFSet]], ptr [[E]], align 1
// CHECK-NEXT: [[C:%.*]] = load float, ptr [[Gep6]], align 4
// CHECK-NEXT: store float [[C]], ptr [[Gep2]], align 4
// CHECK-NEXT: ret void
export void call11(Derived D) {
BFields B = (BFields)D;
}
struct Empty {
};
// cast to an empty struct
// CHECK-LABEL: call12
// CHECK: [[I:%.*]] = alloca <4 x i32>, align 16
// CHECK-NEXT: [[E:%.*]] = alloca %struct.Empty, align 1
// CHECK-NEXT: store <4 x i32> <i32 1, i32 2, i32 3, i32 4>, ptr [[I]], align 16
// CHECK-NEXT: [[A:%.*]] = load <4 x i32>, ptr [[I]], align 16
// CHECK-NEXt: ret void
export void call12() {
int4 I = {1,2,3,4};
Empty E = (Empty)I;
}
struct MoreBFields {
int A;
uint64_t B: 60;
float C;
uint16_t D: 10;
uint16_t E: 6;
int : 32;
double F;
int : 8;
uint G;
};
// more complicated bitfield case
// CHECK-LABEL: call13
// CHECK: [[AA:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[MBF:%.*]] = alloca %struct.MoreBFields, align 1
// CHECK-NEXT: store i32 %A, ptr [[AA]], align 4
// CHECK-NEXT: [[Z:%.*]] = load i32, ptr [[AA]], align 4
// get the gep for the struct.
// CHECK-NEXT: [[Gep:%.*]] = getelementptr inbounds %struct.MoreBFields, ptr [[MBF]], i32 0
// CHECK-NEXT: [[FieldB:%.*]] = getelementptr inbounds nuw %struct.MoreBFields, ptr [[Gep]], i32 0, i32 1
// D and E share the same field index
// CHECK-NEXT: [[FieldD:%.*]] = getelementptr inbounds nuw %struct.MoreBFields, ptr [[Gep]], i32 0, i32 3
// CHECK-NEXT: [[FieldE:%.*]] = getelementptr inbounds nuw %struct.MoreBFields, ptr [[Gep]], i32 0, i32 3
// CHECK-NEXT: [[FieldA:%.*]] = getelementptr inbounds %struct.MoreBFields, ptr [[MBF]], i32 0, i32 0
// CHECK-NEXT: [[FieldC:%.*]] = getelementptr inbounds %struct.MoreBFields, ptr [[MBF]], i32 0, i32 2
// CHECK-NEXT: [[FieldF:%.*]] = getelementptr inbounds %struct.MoreBFields, ptr [[MBF]], i32 0, i32 5
// CHECK-NEXT: [[FieldG:%.*]] = getelementptr inbounds %struct.MoreBFields, ptr [[MBF]], i32 0, i32 7
// store int A into field A
// CHECK-NEXT: store i32 [[Z]], ptr [[FieldA]], align 4
// store int A in bitField B, do necessary conversions
// CHECK-NEXT: [[Conv:%.*]] = sext i32 [[Z]] to i64
// CHECK-NEXT: [[BFL:%.*]] = load i64, ptr [[FieldB]], align 1
// CHECK-NEXT: [[BFV:%.*]] = and i64 [[Conv]], 1152921504606846975
// CHECK-NEXT: [[BFC:%.*]] = and i64 [[BFL]], -1152921504606846976
// CHECK-NEXT: [[BFS:%.*]] = or i64 [[BFC]], [[BFV]]
// CHECK-NEXT: store i64 [[BFS]], ptr [[FieldB]], align 1
// store int A into field C
// CHECK-NEXT: [[Conv5:%.*]] = sitofp i32 [[Z]] to float
// CHECK-NEXT: store float [[Conv5]], ptr [[FieldC]], align 4
// store int A into bitfield D
// CHECK-NEXT: [[Conv6:%.*]] = trunc i32 [[Z]] to i16
// CHECK-NEXT: [[FDL:%.*]] = load i16, ptr [[FieldD]], align 1
// CHECK-NEXT: [[FDV:%.*]] = and i16 [[Conv6]], 1023
// CHECK-NEXT: [[FDC:%.*]] = and i16 [[FDL]], -1024
// CHECK-NEXT: [[FDS:%.*]] = or i16 [[FDC]], [[FDV]]
// CHECK-NEXT: store i16 [[FDS]], ptr [[FieldD]], align 1
// store int A into bitfield E;
// CHECK-NEXT: [[Conv11:%.*]] = trunc i32 [[Z]] to i16
// CHECK-NEXT: [[FEL:%.*]] = load i16, ptr [[FieldE]], align 1
// CHECK-NEXT: [[FEV:%.*]] = and i16 [[Conv11]], 63
// CHECK-NEXT: [[FESHL:%.*]] = shl i16 [[FEV]], 10
// CHECK-NEXT: [[FEC:%.*]] = and i16 [[FEL]], 1023
// CHECK-NEXT: [[FES:%.*]] = or i16 [[FEC]], [[FESHL]]
// CHECK-NEXT: store i16 [[FES]], ptr [[FieldE]], align 1
// store int A into field F
// CHECK-NEXT: [[Conv16:%.*]] = sitofp i32 [[Z]] to double
// CHECK-NEXT: store double [[Conv16]], ptr [[FieldF]], align 8
// store int A into field G
// CHECK-NEXT: store i32 [[Z]], ptr [[FieldG]], align 4
// CHECK-NEXT: ret void
export void call13(int A) {
MoreBFields MBF = (MoreBFields)A;
}
struct Inner {
int Z;
int Y : 25;
};
struct Outer {
int A;
Inner I;
};
// show usage of "extra" gep for struct containing bitfield
// CHECK-LABEL: call14
// CHECK: [[AA:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[O:%.*]] = alloca %struct.Outer, align 1
// CHECK-NEXT: store i32 %A, ptr [[AA]], align 4
// CHECK-NEXT: [[Z:%.*]] = load i32, ptr [[AA]], align 4
// CHECK-NEXT: [[FieldA:%.*]] = getelementptr inbounds %struct.Outer, ptr [[O]], i32 0, i32 0
// showing real usage of "extra gep". need Inner struct to generate access of its bitfield.
// CHECK-NEXT: [[FieldI:%.*]] = getelementptr inbounds %struct.Outer, ptr [[O]], i32 0, i32 1
// CHECK-NEXT: [[FieldY:%.*]] = getelementptr inbounds nuw %struct.Inner, ptr [[FieldI]], i32 0, i32 1
// CHECK-NEXT: [[FieldZ:%.*]] = getelementptr inbounds %struct.Outer, ptr [[O]], i32 0, i32 1, i32 0
// CHECK-NEXT: store i32 [[Z]], ptr [[FieldA]], align 4
// CHECK-NEXT: store i32 [[Z]], ptr [[FieldZ]], align 4
// CHECK-NEXT: [[BFL:%.*]] = load i32, ptr [[FieldY]], align 1
// CHECK-NEXT: [[BFV:%.*]] = and i32 [[Z]], 33554431
// CHECK-NEXT: [[BFC:%.*]] = and i32 [[BFL]], -33554432
// CHECK-NEXT: [[BFS:%.*]] = or i32 [[BFC]], [[BFV]]
// CHECK-NEXT: store i32 [[BFS]], ptr [[FieldY]], align 1
// CHECK-NEXT: ret void
export void call14(int A) {
Outer O = (Outer)A;
}
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