[SPIRV] Ported tests to transcoding directory from the translator

[EbinJose2002]

• Checks for printf calls
• Handling of convert_* builtins and fallback
• Generation of nan and shuffle OpExtInst

[llvmbot]

@llvm/pr-subscribers-backend-spir-v

Author: Ebin-McW (EbinJose2002)

Changes

• Checks for printf calls
• Handling of convert_* builtins and fallback
• Generation of nan and shuffle OpExtInst

---

Full diff: https://github.com/llvm/llvm-project/pull/151662.diff

4 Files Affected:

• (added) llvm/test/CodeGen/SPIRV/transcoding/OpenCL/convert_functions.ll (+56)
• (added) llvm/test/CodeGen/SPIRV/transcoding/OpenCL/nan.ll (+15)
• (added) llvm/test/CodeGen/SPIRV/transcoding/OpenCL/shuffle.ll (+23)
• (added) llvm/test/CodeGen/SPIRV/transcoding/printf.ll (+14)

diff --git a/llvm/test/CodeGen/SPIRV/transcoding/OpenCL/convert_functions.ll b/llvm/test/CodeGen/SPIRV/transcoding/OpenCL/convert_functions.ll
new file mode 100644
index 0000000000000..13a61b08b75df
--- /dev/null
+++ b/llvm/test/CodeGen/SPIRV/transcoding/OpenCL/convert_functions.ll
@@ -0,0 +1,56 @@
+; This test checks that functions with `convert_` prefix are translated as
+; OpenCL builtins only in case they match the specification. Otherwise, we
+; expect such functions to be translated to SPIR-V FunctionCall.
+
+; RUN: llc -O0 -mtriple=spirv32-unknown-unknown %s -o - | FileCheck %s --check-prefix=CHECK-SPIRV
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv32-unknown-unknown %s -o - -filetype=obj | spirv-val %}
+
+; CHECK-SPIRV: OpName %[[#Func:]] "_Z18convert_float_func"
+; CHECK-SPIRV: OpName %[[#Func1:]] "_Z20convert_uint_satfunc"
+; CHECK-SPIRV: OpName %[[#Func2:]] "_Z21convert_float_rtzfunc"
+; CHECK-SPIRV-DAG: %[[#VoidTy:]] = OpTypeVoid
+; CHECK-SPIRV-DAG: %[[#CharTy:]] = OpTypeInt 8
+; CHECK-SPIRV-DAG: %[[#FloatTy:]] = OpTypeFloat 32
+
+; CHECK-SPIRV: %[[#Func]] = OpFunction %[[#VoidTy]] None %[[#]]
+; CHECK-SPIRV: %[[#ConvertId1:]] = OpUConvert %[[#CharTy]] %[[#]]
+; CHECK-SPIRV: %[[#ConvertId2:]] = OpConvertSToF %[[#FloatTy]] %[[#]]
+; CHECK-SPIRV: %[[#]] = OpFunctionCall %[[#VoidTy]] %[[#Func]] %[[#ConvertId2]]
+; CHECK-SPIRV: %[[#]] = OpFunctionCall %[[#VoidTy]] %[[#Func1]] %[[#]]
+; CHECK-SPIRV: %[[#]] = OpFunctionCall %[[#VoidTy]] %[[#Func2]] %[[#ConvertId2]]
+; CHECK-SPIRV-NOT: OpFConvert
+; CHECK-SPIRV-NOT: OpConvertUToF
+
+define dso_local spir_func void @_Z18convert_float_func(float noundef %x) {
+entry:
+  %x.addr = alloca float, align 4
+  store float %x, ptr %x.addr, align 4
+  ret void
+}
+
+define dso_local spir_func void @_Z20convert_uint_satfunc(i32 noundef %x) {
+entry:
+  ret void
+}
+
+define dso_local spir_func void @_Z21convert_float_rtzfunc(float noundef %x) {
+entry:
+  ret void
+}
+
+define dso_local spir_func void @convert_int_bf16(i32 noundef %x) {
+entry:
+  %x.addr = alloca i32, align 4
+  store i32 %x, ptr %x.addr, align 4
+  %0 = load i32, ptr %x.addr, align 4
+  call spir_func signext i8 @_Z16convert_char_rtei(i32 noundef %0)
+  %call = call spir_func float @_Z13convert_floati(i32 noundef %0)
+  call spir_func void @_Z18convert_float_func(float noundef %call)
+  call spir_func void @_Z20convert_uint_satfunc(i32 noundef %0)
+  call spir_func void @_Z21convert_float_rtzfunc(float noundef %call)
+  ret void
+}
+
+declare spir_func signext i8 @_Z16convert_char_rtei(i32 noundef)
+
+declare spir_func float @_Z13convert_floati(i32 noundef)
diff --git a/llvm/test/CodeGen/SPIRV/transcoding/OpenCL/nan.ll b/llvm/test/CodeGen/SPIRV/transcoding/OpenCL/nan.ll
new file mode 100644
index 0000000000000..1072f073924be
--- /dev/null
+++ b/llvm/test/CodeGen/SPIRV/transcoding/OpenCL/nan.ll
@@ -0,0 +1,15 @@
+; RUN: llc -O0 -mtriple=spirv32-unknown-unknown %s -o - | FileCheck %s --check-prefix=CHECK-SPIRV
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv32-unknown-unknown %s -o - -filetype=obj | spirv-val %}
+
+; Check OpenCL built-in nan translation.
+
+; CHECK-SPIRV: %[[#]] = OpExtInst %[[#]] %[[#]] nan %[[#]]
+
+define dso_local spir_kernel void @test(ptr addrspace(1) align 4 %a, i32 %b) {
+entry:
+  %call = tail call spir_func float @_Z3nanj(i32 %b)
+  store float %call, ptr addrspace(1) %a, align 4
+  ret void
+}
+
+declare spir_func float @_Z3nanj(i32)
diff --git a/llvm/test/CodeGen/SPIRV/transcoding/OpenCL/shuffle.ll b/llvm/test/CodeGen/SPIRV/transcoding/OpenCL/shuffle.ll
new file mode 100644
index 0000000000000..aeca431f89e20
--- /dev/null
+++ b/llvm/test/CodeGen/SPIRV/transcoding/OpenCL/shuffle.ll
@@ -0,0 +1,23 @@
+; RUN: llc -O0 -mtriple=spirv32-unknown-unknown %s -o - | FileCheck %s --check-prefix=CHECK-SPIRV
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv32-unknown-unknown %s -o - -filetype=obj | spirv-val %}
+
+; Check OpenCL built-in shuffle and shuffle2 translation.
+
+; CHECK-SPIRV: %[[#]] = OpExtInst %[[#]] %[[#]] shuffle %[[#]] %[[#]]
+; CHECK-SPIRV: %[[#]] = OpExtInst %[[#]] %[[#]] shuffle2 %[[#]] %[[#]] %[[#]]
+
+define spir_kernel void @test() {
+entry:
+  %call = call spir_func <2 x float> @_Z7shuffleDv2_fDv2_j(<2 x float> zeroinitializer, <2 x i32> zeroinitializer)
+  ret void
+}
+
+declare spir_func <2 x float> @_Z7shuffleDv2_fDv2_j(<2 x float>, <2 x i32>)
+
+define spir_kernel void @test2() {
+entry:
+  %call = call spir_func <4 x float> @_Z8shuffle2Dv2_fS_Dv4_j(<2 x float> zeroinitializer, <2 x float> zeroinitializer, <4 x i32> zeroinitializer)
+  ret void
+}
+
+declare spir_func <4 x float> @_Z8shuffle2Dv2_fS_Dv4_j(<2 x float>, <2 x float>, <4 x i32>)
diff --git a/llvm/test/CodeGen/SPIRV/transcoding/printf.ll b/llvm/test/CodeGen/SPIRV/transcoding/printf.ll
new file mode 100644
index 0000000000000..338f0a52248e5
--- /dev/null
+++ b/llvm/test/CodeGen/SPIRV/transcoding/printf.ll
@@ -0,0 +1,14 @@
+; RUN: llc -O0 -mtriple=spirv32-unknown-unknown %s -o - | FileCheck %s --check-prefix=CHECK-SPIRV
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv32-unknown-unknown %s -o - -filetype=obj | spirv-val %}
+
+@.str = private unnamed_addr addrspace(2) constant [12 x i8] c"Hello World\00", align 1
+
+; CHECK-SPIRV: %[[#]] = OpExtInst %[[#]] %[[#]] printf %[[#]]
+
+define dso_local spir_kernel void @BuiltinPrintf() {
+entry:
+  %call = tail call i32 (ptr addrspace(2), ...) @printf(ptr addrspace(2) noundef @.str)
+  ret void
+}
+
+declare noundef i32 @printf(ptr addrspace(2) nocapture noundef readonly, ...)