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llvm-project/clang/test/CodeGenOpenCL/preserve_vec3.cl
Florian Hahn 53785846aa
[Clang] Freeze padded vectors before storing. (#164821) 
Currently Clang usually leaves padding bits uninitialized, which means
they are undef at the moment.

When expanding stores of vector types to include padding, the padding
lanes will be poison, hence the padding bits will be poison.

This interacts badly with coercion of arguments and return values, where
3 x float vectors will be loaded as i128 integer; poisoning the padding
bits will make the whole value poison.

Not sure if there's a better way, but I think we have a number of places
that currently rely on the padding being undef, not poison.

PR: https://github.com/llvm/llvm-project/pull/164821
2025-10-28 19:03:17 -07:00

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// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 6
// RUN: %clang_cc1 %s -emit-llvm -o - -triple spir-unknown-unknown | FileCheck %s
typedef char char3 __attribute__((ext_vector_type(3)));
typedef char char8 __attribute__((ext_vector_type(8)));
typedef short short3 __attribute__((ext_vector_type(3)));
typedef double double2 __attribute__((ext_vector_type(2)));
typedef float float3 __attribute__((ext_vector_type(3)));
typedef float float4 __attribute__((ext_vector_type(4)));
// CHECK-LABEL: define dso_local spir_kernel void @foo(
// CHECK-SAME: ptr addrspace(1) noundef readonly align 16 captures(none) [[A:%.*]], ptr addrspace(1) noundef writeonly align 16 captures(none) initializes((0, 16)) [[B:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] !kernel_arg_addr_space [[META7:![0-9]+]] !kernel_arg_access_qual [[META8:![0-9]+]] !kernel_arg_type [[META9:![0-9]+]] !kernel_arg_base_type [[META10:![0-9]+]] !kernel_arg_type_qual [[META11:![0-9]+]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[TMP0:%.*]] = load <3 x float>, ptr addrspace(1) [[A]], align 16
// CHECK-NEXT: [[EXTRACTVEC1_I:%.*]] = shufflevector <3 x float> [[TMP0]], <3 x float> <float undef, float poison, float poison>, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
// CHECK-NEXT: store <4 x float> [[EXTRACTVEC1_I]], ptr addrspace(1) [[B]], align 16, !tbaa [[CHAR_TBAA12:![0-9]+]]
// CHECK-NEXT: ret void
//
void kernel foo(global float3 *a, global float3 *b) {
*b = *a;
}
// CHECK-LABEL: define dso_local spir_kernel void @float4_to_float3(
// CHECK-SAME: ptr addrspace(1) noundef writeonly align 16 captures(none) initializes((0, 16)) [[A:%.*]], ptr addrspace(1) noundef readonly align 16 captures(none) [[B:%.*]]) local_unnamed_addr #[[ATTR0]] !kernel_arg_addr_space [[META7]] !kernel_arg_access_qual [[META8]] !kernel_arg_type [[META13:![0-9]+]] !kernel_arg_base_type [[META14:![0-9]+]] !kernel_arg_type_qual [[META11]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[TMP0:%.*]] = load <3 x float>, ptr addrspace(1) [[B]], align 16, !tbaa [[CHAR_TBAA12]]
// CHECK-NEXT: [[EXTRACTVEC_I:%.*]] = shufflevector <3 x float> [[TMP0]], <3 x float> <float undef, float poison, float poison>, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
// CHECK-NEXT: store <4 x float> [[EXTRACTVEC_I]], ptr addrspace(1) [[A]], align 16, !tbaa [[CHAR_TBAA12]]
// CHECK-NEXT: ret void
//
void kernel float4_to_float3(global float3 *a, global float4 *b) {
*a = __builtin_astype(*b, float3);
}
// CHECK-LABEL: define dso_local spir_kernel void @float3_to_float4(
// CHECK-SAME: ptr addrspace(1) noundef readonly align 16 captures(none) [[A:%.*]], ptr addrspace(1) noundef writeonly align 16 captures(none) initializes((0, 16)) [[B:%.*]]) local_unnamed_addr #[[ATTR0]] !kernel_arg_addr_space [[META7]] !kernel_arg_access_qual [[META8]] !kernel_arg_type [[META13]] !kernel_arg_base_type [[META14]] !kernel_arg_type_qual [[META11]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[TMP0:%.*]] = load <3 x float>, ptr addrspace(1) [[A]], align 16
// CHECK-NEXT: [[ASTYPE_I:%.*]] = shufflevector <3 x float> [[TMP0]], <3 x float> poison, <4 x i32> <i32 0, i32 1, i32 2, i32 poison>
// CHECK-NEXT: store <4 x float> [[ASTYPE_I]], ptr addrspace(1) [[B]], align 16, !tbaa [[CHAR_TBAA12]]
// CHECK-NEXT: ret void
//
void kernel float3_to_float4(global float3 *a, global float4 *b) {
*b = __builtin_astype(*a, float4);
}
// CHECK-LABEL: define dso_local spir_kernel void @float3_to_double2(
// CHECK-SAME: ptr addrspace(1) noundef readonly align 16 captures(none) [[A:%.*]], ptr addrspace(1) noundef writeonly align 16 captures(none) initializes((0, 16)) [[B:%.*]]) local_unnamed_addr #[[ATTR0]] !kernel_arg_addr_space [[META7]] !kernel_arg_access_qual [[META8]] !kernel_arg_type [[META15:![0-9]+]] !kernel_arg_base_type [[META16:![0-9]+]] !kernel_arg_type_qual [[META11]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[TMP0:%.*]] = load <3 x float>, ptr addrspace(1) [[A]], align 16
// CHECK-NEXT: [[TMP1:%.*]] = shufflevector <3 x float> [[TMP0]], <3 x float> poison, <4 x i32> <i32 0, i32 1, i32 2, i32 poison>
// CHECK-NEXT: store <4 x float> [[TMP1]], ptr addrspace(1) [[B]], align 16, !tbaa [[CHAR_TBAA12]]
// CHECK-NEXT: ret void
//
void kernel float3_to_double2(global float3 *a, global double2 *b) {
*b = __builtin_astype(*a, double2);
}
// CHECK-LABEL: define dso_local spir_kernel void @char8_to_short3(
// CHECK-SAME: ptr addrspace(1) noundef writeonly align 8 captures(none) initializes((0, 8)) [[A:%.*]], ptr addrspace(1) noundef readonly align 8 captures(none) [[B:%.*]]) local_unnamed_addr #[[ATTR0]] !kernel_arg_addr_space [[META7]] !kernel_arg_access_qual [[META8]] !kernel_arg_type [[META17:![0-9]+]] !kernel_arg_base_type [[META18:![0-9]+]] !kernel_arg_type_qual [[META11]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[TMP0:%.*]] = load <3 x i16>, ptr addrspace(1) [[B]], align 8, !tbaa [[CHAR_TBAA12]]
// CHECK-NEXT: [[EXTRACTVEC_I:%.*]] = shufflevector <3 x i16> [[TMP0]], <3 x i16> <i16 undef, i16 poison, i16 poison>, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
// CHECK-NEXT: store <4 x i16> [[EXTRACTVEC_I]], ptr addrspace(1) [[A]], align 8, !tbaa [[CHAR_TBAA12]]
// CHECK-NEXT: ret void
//
void kernel char8_to_short3(global short3 *a, global char8 *b) {
*a = __builtin_astype(*b, short3);
}
// CHECK-LABEL: define dso_local spir_func void @from_char3(
// CHECK-SAME: <3 x i8> noundef [[A:%.*]], ptr addrspace(1) noundef writeonly captures(none) initializes((0, 4)) [[OUT:%.*]]) local_unnamed_addr #[[ATTR2:[0-9]+]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[TMP0:%.*]] = shufflevector <3 x i8> [[A]], <3 x i8> poison, <4 x i32> <i32 0, i32 1, i32 2, i32 poison>
// CHECK-NEXT: store <4 x i8> [[TMP0]], ptr addrspace(1) [[OUT]], align 4, !tbaa [[INT_TBAA3:![0-9]+]]
// CHECK-NEXT: ret void
//
void from_char3(char3 a, global int *out) {
*out = __builtin_astype(a, int);
}
// CHECK-LABEL: define dso_local spir_func void @from_short3(
// CHECK-SAME: <3 x i16> noundef [[A:%.*]], ptr addrspace(1) noundef writeonly captures(none) initializes((0, 8)) [[OUT:%.*]]) local_unnamed_addr #[[ATTR2]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[TMP0:%.*]] = shufflevector <3 x i16> [[A]], <3 x i16> poison, <4 x i32> <i32 0, i32 1, i32 2, i32 poison>
// CHECK-NEXT: store <4 x i16> [[TMP0]], ptr addrspace(1) [[OUT]], align 8, !tbaa [[LONG_TBAA19:![0-9]+]]
// CHECK-NEXT: ret void
//
void from_short3(short3 a, global long *out) {
*out = __builtin_astype(a, long);
}
// CHECK-LABEL: define dso_local spir_func void @scalar_to_char3(
// CHECK-SAME: i32 noundef [[A:%.*]], ptr addrspace(1) noundef writeonly captures(none) initializes((0, 4)) [[OUT:%.*]]) local_unnamed_addr #[[ATTR2]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[TMP0:%.*]] = bitcast i32 [[A]] to <4 x i8>
// CHECK-NEXT: [[ASTYPE:%.*]] = shufflevector <4 x i8> [[TMP0]], <4 x i8> poison, <3 x i32> <i32 0, i32 1, i32 2>
// CHECK-NEXT: [[EXTRACTVEC:%.*]] = shufflevector <3 x i8> [[ASTYPE]], <3 x i8> <i8 undef, i8 poison, i8 poison>, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
// CHECK-NEXT: store <4 x i8> [[EXTRACTVEC]], ptr addrspace(1) [[OUT]], align 4, !tbaa [[CHAR_TBAA12]]
// CHECK-NEXT: ret void
//
void scalar_to_char3(int a, global char3 *out) {
*out = __builtin_astype(a, char3);
}
// CHECK-LABEL: define dso_local spir_func void @scalar_to_short3(
// CHECK-SAME: i64 noundef [[A:%.*]], ptr addrspace(1) noundef writeonly captures(none) initializes((0, 8)) [[OUT:%.*]]) local_unnamed_addr #[[ATTR2]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[TMP0:%.*]] = bitcast i64 [[A]] to <4 x i16>
// CHECK-NEXT: [[ASTYPE:%.*]] = shufflevector <4 x i16> [[TMP0]], <4 x i16> poison, <3 x i32> <i32 0, i32 1, i32 2>
// CHECK-NEXT: [[EXTRACTVEC:%.*]] = shufflevector <3 x i16> [[ASTYPE]], <3 x i16> <i16 undef, i16 poison, i16 poison>, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
// CHECK-NEXT: store <4 x i16> [[EXTRACTVEC]], ptr addrspace(1) [[OUT]], align 8, !tbaa [[CHAR_TBAA12]]
// CHECK-NEXT: ret void
//
void scalar_to_short3(long a, global short3 *out) {
*out = __builtin_astype(a, short3);
}
//.
// CHECK: [[INT_TBAA3]] = !{[[META4:![0-9]+]], [[META4]], i64 0}
// CHECK: [[META4]] = !{!"int", [[META5:![0-9]+]], i64 0}
// CHECK: [[META5]] = !{!"omnipotent char", [[META6:![0-9]+]], i64 0}
// CHECK: [[META6]] = !{!"Simple C/C++ TBAA"}
// CHECK: [[META7]] = !{i32 1, i32 1}
// CHECK: [[META8]] = !{!"none", !"none"}
// CHECK: [[META9]] = !{!"float3*", !"float3*"}
// CHECK: [[META10]] = !{!"float __attribute__((ext_vector_type(3)))*", !"float __attribute__((ext_vector_type(3)))*"}
// CHECK: [[META11]] = !{!"", !""}
// CHECK: [[CHAR_TBAA12]] = !{[[META5]], [[META5]], i64 0}
// CHECK: [[META13]] = !{!"float3*", !"float4*"}
// CHECK: [[META14]] = !{!"float __attribute__((ext_vector_type(3)))*", !"float __attribute__((ext_vector_type(4)))*"}
// CHECK: [[META15]] = !{!"float3*", !"double2*"}
// CHECK: [[META16]] = !{!"float __attribute__((ext_vector_type(3)))*", !"double __attribute__((ext_vector_type(2)))*"}
// CHECK: [[META17]] = !{!"short3*", !"char8*"}
// CHECK: [[META18]] = !{!"short __attribute__((ext_vector_type(3)))*", !"char __attribute__((ext_vector_type(8)))*"}
// CHECK: [[LONG_TBAA19]] = !{[[META20:![0-9]+]], [[META20]], i64 0}
// CHECK: [[META20]] = !{!"long", [[META5]], i64 0}
//.
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