[llvm] [SPIRV] Implement log10 for logical SPIR-V (PR #66921)

[Natalie Chouinard via llvm-commits]

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@@ -0,0 +1,42 @@
+; RUN: llc -O0 -mtriple=spirv-unknown-linux %s -o - | FileCheck %s
+
+; CHECK: OpExtInstImport "GLSL.std.450"
+
+; CHECK: %[[#float:]] = OpTypeFloat 32
+; CHECK: %[[#v4float:]] = OpTypeVector %[[#float]] 4
+; CHECK: %[[#float_0_30103001:]] = OpConstant %[[#float]] 0.30103000998497009
+; CHECK: %[[#_ptr_Function_v4float:]] = OpTypePointer Function %[[#v4float]]
+; CHECK: %[[#_ptr_Function_float:]] = OpTypePointer Function %[[#float]]
+
+define void @main() {
+entry:
+; CHECK: %[[#f:]] = OpVariable %[[#_ptr_Function_float]] Function
+; CHECK: %[[#logf:]] = OpVariable %[[#_ptr_Function_float]] Function
+; CHECK: %[[#f4:]] = OpVariable %[[#_ptr_Function_v4float]] Function
+; CHECK: %[[#logf4:]] = OpVariable %[[#_ptr_Function_v4float]] Function
+  %f = alloca float, align 4
+  %logf = alloca float, align 4
+  %f4 = alloca <4 x float>, align 16
+  %logf4 = alloca <4 x float>, align 16
+
+; CHECK: %[[#load:]] = OpLoad %[[#float]] %[[#f]] Aligned 4
+; CHECK: %[[#log2:]] = OpExtInst %[[#float]] %15 Log %[[#load]]
+; CHECK: %[[#res:]] = OpFMul %[[#float]] %[[#log2]] %[[#float_0_30103001]]
+; CHECK: OpStore %[[#logf]] %[[#res]] Aligned 4
+  %0 = load float, ptr %f, align 4
+  %elt.log10 = call float @llvm.log10.f32(float %0)
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sudonatalie wrote:

Yeah, I think it's a bit superfluous to add those tests here but we probably should have some for legalization.

https://github.com/llvm/llvm-project/pull/66921