================
@@ -0,0 +1,98 @@
+; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv1.5-vulkan-unknown %s -o -
| FileCheck %s
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv1.5-vulkan-unknown %s -o -
-filetype=obj | spirv-val %}
+
+; Test WaveReadLaneFirst lowering for scalar, vector, and matrix types.
+
+; CHECK: Capability Shader
+; CHECK: Capability GroupNonUniformBallot
+
+; CHECK-DAG: %[[#uint:]] = OpTypeInt 32 0
+; CHECK-DAG: %[[#f32:]] = OpTypeFloat 32
+; CHECK-DAG: %[[#v2_float:]] = OpTypeVector %[[#f32]] 2
+; CHECK-DAG: %[[#v4_float:]] = OpTypeVector %[[#f32]] 4
+; CHECK-DAG: %[[#bool:]] = OpTypeBool
+; CHECK-DAG: %[[#scope:]] = OpConstant %[[#uint]] 3
+
+@wide_f32_5 = internal addrspace(10) global [5 x float] zeroinitializer
+@wide_f32_6 = internal addrspace(10) global [6 x float] zeroinitializer
+@wide_f32_12 = internal addrspace(10) global [12 x float] zeroinitializer
+
+; CHECK-LABEL: Begin function test_float
+; CHECK: %[[#fexpr:]] = OpFunctionParameter %[[#f32]]
+define float @test_float(float %fexpr) {
+entry:
+; CHECK: %[[#]] = OpGroupNonUniformBroadcastFirst %[[#f32]] %[[#scope]]
%[[#fexpr]]
+ %0 = call float @llvm.spv.wave.readlane.first.f32(float %fexpr)
+ ret float %0
+}
+
+; CHECK-LABEL: Begin function test_int
+; CHECK: %[[#iexpr:]] = OpFunctionParameter %[[#uint]]
+define i32 @test_int(i32 %iexpr) {
+entry:
+; CHECK: %[[#]] = OpGroupNonUniformBroadcastFirst %[[#uint]] %[[#scope]]
%[[#iexpr]]
+ %0 = call i32 @llvm.spv.wave.readlane.first.i32(i32 %iexpr)
+ ret i32 %0
+}
+
+; CHECK-LABEL: Begin function test_bool
+; CHECK: %[[#bexpr:]] = OpFunctionParameter %[[#bool]]
+define i1 @test_bool(i1 %bexpr) {
+entry:
+; CHECK: %[[#]] = OpGroupNonUniformBroadcastFirst %[[#bool]] %[[#scope]]
%[[#bexpr]]
+ %0 = call i1 @llvm.spv.wave.readlane.first.i1(i1 %bexpr)
+ ret i1 %0
+}
+
+; CHECK-LABEL: Begin function test_vfloat
+; CHECK: %[[#vfexpr:]] = OpFunctionParameter %[[#v4_float]]
+define <4 x float> @test_vfloat(<4 x float> %vfexpr) {
+entry:
+; CHECK: %[[#]] = OpGroupNonUniformBroadcastFirst %[[#v4_float]] %[[#scope]]
%[[#vfexpr]]
+ %0 = call <4 x float> @llvm.spv.wave.readlane.first.v4f32(
+ <4 x float> %vfexpr)
+ ret <4 x float> %0
+}
+
+; CHECK-LABEL: Begin function test_floatv5
+define void @test_floatv5() {
+entry:
+ %expr = load <5 x float>, ptr addrspace(10) @wide_f32_5
+; CHECK: OpGroupNonUniformBroadcastFirst %[[#v4_float]] %[[#scope]]
+; CHECK: OpGroupNonUniformBroadcastFirst %[[#f32]] %[[#scope]]
----------------
farzonl wrote:
is this right? shouldn't this be using `VK_EXT_shader_long_vector` and thus
preserving the vector size?
https://github.com/llvm/llvm-project/pull/220373
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