[llvm] [SPIRV] Porting Test from Translator (PR #152247)

Tue Aug 5 21:49:15 PDT 2025

llvmbot wrote:




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

Author: Subash B (SubashBoopathi)

<details>
<summary>Changes</summary>

These tests verify SPIR-V code generation for LLVM intrinsics and atomic operations, ensuring correct translation of fcmp false, llvm.fake.use, and atomic_compare_exchange.

---
Full diff: https://github.com/llvm/llvm-project/pull/152247.diff


3 Files Affected:

- (added) llvm/test/CodeGen/SPIRV/FCmpFalse.ll (+10) 
- (added) llvm/test/CodeGen/SPIRV/llvm-intrinsics/fake_use.ll (+13) 
- (added) llvm/test/CodeGen/SPIRV/transcoding/AtomicCompareExchange_cl20.ll (+84) 


``````````diff

diff --git a/llvm/test/CodeGen/SPIRV/FCmpFalse.ll b/llvm/test/CodeGen/SPIRV/FCmpFalse.ll
new file mode 100644
index 0000000000000..55d64196cafaa
--- /dev/null
+++ b/llvm/test/CodeGen/SPIRV/FCmpFalse.ll
@@ -0,0 +1,10 @@
+; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown %s -o - | FileCheck %s
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv32-unknown-unknown %s -o - -filetype=obj | spirv-val %}
+
+; CHECK: %[[#FalseVal:]] = OpConstantFalse %[[#]]
+; CHECK: OpReturnValue %[[#FalseVal:]]
+
+define spir_func i1 @f(float %0) {
+ %2 = fcmp false float %0, %0
+ ret i1 %2
+}
diff --git a/llvm/test/CodeGen/SPIRV/llvm-intrinsics/fake_use.ll b/llvm/test/CodeGen/SPIRV/llvm-intrinsics/fake_use.ll
new file mode 100644
index 0000000000000..6db2d757f3928
--- /dev/null
+++ b/llvm/test/CodeGen/SPIRV/llvm-intrinsics/fake_use.ll
@@ -0,0 +1,13 @@
+; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown %s -o - | FileCheck %s
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv64-unknown-unknown %s -o - -filetype=obj | spirv-val %}
+
+; CHECK-DAG: OpCapability Addresses
+; CHECK-DAG: OpName %[[#]] "foo"
+
+declare void @llvm.fake.use(...)
+
+define spir_kernel void @foo(ptr addrspace(1) %a) {
+entry:
+  call void (...) @llvm.fake.use(i8 undef)
+  ret void
+}
diff --git a/llvm/test/CodeGen/SPIRV/transcoding/AtomicCompareExchange_cl20.ll b/llvm/test/CodeGen/SPIRV/transcoding/AtomicCompareExchange_cl20.ll
new file mode 100644
index 0000000000000..83573737df9eb
--- /dev/null
+++ b/llvm/test/CodeGen/SPIRV/transcoding/AtomicCompareExchange_cl20.ll
@@ -0,0 +1,84 @@
+; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown %s -o - | FileCheck %s 
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv64v1.2-unknown-unknown %s -o - -filetype=obj | spirv-val %}
+
+; CHECK-NOT: OpCapability Int64Atomics
+
+; CHECK-DAG: %[[#int:]] = OpTypeInt 32 0
+; CHECK-DAG: %[[#int8:]] = OpTypeInt 8 0
+; CHECK-DAG: %[[#DeviceScope:]] =  OpConstant %[[#int]] 1
+; CHECK-DAG: %[[#SequentiallyConsistent_MS:]] = OpConstant %[[#int]] 16
+; CHECK-DAG: %[[#int_ptr:]] = OpTypePointer Generic %[[#int]]
+; CHECK-DAG: %[[#int_ptr8:]] = OpTypePointer Generic %[[#int8]]
+; CHECK-DAG: %[[#bool:]] = OpTypeBool
+
+define spir_func void @test(ptr addrspace(4) %object, ptr addrspace(4) %expected, i32 %desired) {
+
+; CHECK: %[[#object:]] = OpFunctionParameter %[[#int_ptr8]]
+; CHECK: %[[#expected:]] = OpFunctionParameter %[[#int_ptr8]] 
+; CHECK: %[[#desired:]] = OpFunctionParameter %[[#int]]
+
+entry:
+  %object.addr = alloca ptr addrspace(4), align 4
+  %expected.addr = alloca ptr addrspace(4), align 4
+  %desired.addr = alloca i32, align 4
+  %strong_res = alloca i8, align 1
+  %res = alloca i8, align 1
+  %weak_res = alloca i8, align 1
+  store ptr addrspace(4) %object, ptr %object.addr, align 4
+  store ptr addrspace(4) %expected, ptr %expected.addr, align 4
+  store i32 %desired, ptr %desired.addr, align 4
+  %0 = load ptr addrspace(4), ptr %object.addr, align 4
+  %1 = load ptr addrspace(4), ptr %expected.addr, align 4
+  %2 = load i32, ptr %desired.addr, align 4
+
+; CHECK-DAG: OpStore %[[#object_addr:]] %[[#object]]
+; CHECK-DAG: OpStore %[[#expected_addr:]] %[[#expected]]
+; CHECK-DAG: OpStore %[[#desired_addr:]] %[[#desired]]
+  
+; CHECK: %[[#Pointer:]] = OpLoad %[[#int_ptr]] %[[#]]
+; CHECK: %[[#exp:]] = OpLoad %[[#int_ptr]] %[[#]]
+; CHECK: %[[#Value:]] = OpLoad %[[#int]] %[[#desired_addr]]
+; CHECK: %[[#Comparator:]] = OpLoad %[[#int]] %[[#exp]]
+
+; CHECK: %[[#Result:]] = OpAtomicCompareExchange %[[#int]] %[[#]] %[[#DeviceScope]] %[[#SequentiallyConsistent_MS]] %[[#SequentiallyConsistent_MS]] %[[#Value]] %[[#Comparator]]
+  %call = call spir_func zeroext i1 @_Z30atomic_compare_exchange_strongPVU3AS4U7_AtomiciPU3AS4ii(ptr addrspace(4) %0, ptr addrspace(4) %1, i32 %2)
+
+; CHECK-NEXT: OpStore %[[#exp]] %[[#Result]]
+; CHECK-NEXT: %[[#CallRes:]] = OpIEqual %[[#bool]] %[[#Result]] %[[#Comparator]]
+; CHECK-NOT: %[[#Result]]
+
+  %frombool = zext i1 %call to i8
+  store i8 %frombool, ptr %strong_res, align 1
+  %3 = load i8, ptr %strong_res, align 1
+  %tobool = trunc i8 %3 to i1
+  %lnot = xor i1 %tobool, true
+  %frombool1 = zext i1 %lnot to i8
+  store i8 %frombool1, ptr %res, align 1
+  %4 = load ptr addrspace(4), ptr %object.addr, align 4
+  %5 = load ptr addrspace(4), ptr %expected.addr, align 4
+  %6 = load i32, ptr %desired.addr, align 4
+
+; CHECK: %[[#Pointer:]] = OpLoad %[[#int_ptr]] %[[#]]
+; CHECK: %[[#exp:]] = OpLoad %[[#int_ptr]] %[[#]]
+; CHECK: %[[#Value:]] = OpLoad %[[#int]] %[[#desired_addr]]
+; CHECK: %[[#ComparatorWeak:]] = OpLoad %[[#int]] %[[#exp]]
+
+; CHECK: %[[#Result:]] = OpAtomicCompareExchangeWeak %[[#int]] %[[#]] %[[#DeviceScope]] %[[#SequentiallyConsistent_MS]] %[[#SequentiallyConsistent_MS]] %[[#Value]] %[[#ComparatorWeak]]
+  %call2 = call spir_func zeroext i1 @_Z28atomic_compare_exchange_weakPVU3AS4U7_AtomiciPU3AS4ii(ptr addrspace(4) %4, ptr addrspace(4) %5, i32 %6)
+
+; CHECK-NEXT: OpStore %[[#exp]] %[[#Result]]
+; CHECK-NEXT: %[[#CallRes:]] = OpIEqual %[[#bool]] %[[#Result]] %[[#ComparatorWeak]]
+; CHECK-NOT: %[[#Result]]
+
+  %frombool3 = zext i1 %call2 to i8
+  store i8 %frombool3, ptr %weak_res, align 1
+  %7 = load i8, ptr %weak_res, align 1
+  %tobool4 = trunc i8 %7 to i1
+  %lnot5 = xor i1 %tobool4, true
+  %frombool6 = zext i1 %lnot5 to i8
+  store i8 %frombool6, ptr %res, align 1
+  ret void
+}
+
+declare spir_func zeroext i1 @_Z30atomic_compare_exchange_strongPVU3AS4U7_AtomiciPU3AS4ii(ptr addrspace(4), ptr addrspace(4), i32) #1
+declare spir_func zeroext i1 @_Z28atomic_compare_exchange_weakPVU3AS4U7_AtomiciPU3AS4ii(ptr addrspace(4), ptr addrspace(4), i32) #1

``````````

</details>


https://github.com/llvm/llvm-project/pull/152247
