From 4a9da0760264f86dd46b30807bd9556c8dffd427 Mon Sep 17 00:00:00 2001
From: Troels Henriksen <athas@sigkill.dk>
Date: Wed, 6 Dec 2023 22:38:43 +0100
Subject: [PATCH] Factor this into separate function.

---
 src/Futhark/CodeGen/Backends/GPU.hs      | 13 +++++++------
 src/Futhark/CodeGen/Backends/PyOpenCL.hs | 11 ++++++-----
 2 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/src/Futhark/CodeGen/Backends/GPU.hs b/src/Futhark/CodeGen/Backends/GPU.hs
index 5311a98f70..c2483b99f8 100644
--- a/src/Futhark/CodeGen/Backends/GPU.hs
+++ b/src/Futhark/CodeGen/Backends/GPU.hs
@@ -66,9 +66,12 @@ genKernelFunction kernel_name safety arg_params arg_set = do
           ([C.cinit|&ctx->global_failure_args|], [C.cinit|sizeof(ctx->global_failure_args)|])
         ]
 
+getParamByKey :: Name -> C.Exp
+getParamByKey key = [C.cexp|*ctx->tuning_params.$id:key|]
+
 kernelConstToExp :: KernelConst -> C.Exp
 kernelConstToExp (SizeConst key) =
-  [C.cexp|*ctx->tuning_params.$id:key|]
+  getParamByKey key
 kernelConstToExp (SizeMaxConst size_class) =
   [C.cexp|ctx->$id:field|]
   where
@@ -133,13 +136,11 @@ genLaunchKernel safety kernel_name local_memory args num_groups group_size = do
         )
 
 callKernel :: GC.OpCompiler OpenCL ()
-callKernel (GetSize v key) = do
-  let e = kernelConstToExp $ SizeConst key
-  GC.stm [C.cstm|$id:v = $exp:e;|]
+callKernel (GetSize v key) =
+  GC.stm [C.cstm|$id:v = $exp:(getParamByKey key);|]
 callKernel (CmpSizeLe v key x) = do
-  let e = kernelConstToExp $ SizeConst key
   x' <- GC.compileExp x
-  GC.stm [C.cstm|$id:v = $exp:e <= $exp:x';|]
+  GC.stm [C.cstm|$id:v = $exp:(getParamByKey key) <= $exp:x';|]
   -- Output size information if logging is enabled.  The autotuner
   -- depends on the format of this output, so use caution if changing
   -- it.
diff --git a/src/Futhark/CodeGen/Backends/PyOpenCL.hs b/src/Futhark/CodeGen/Backends/PyOpenCL.hs
index 389535f0af..4ee771c56c 100644
--- a/src/Futhark/CodeGen/Backends/PyOpenCL.hs
+++ b/src/Futhark/CodeGen/Backends/PyOpenCL.hs
@@ -202,9 +202,12 @@ compileProg mode class_name prog = do
 asLong :: PyExp -> PyExp
 asLong x = simpleCall "np.int64" [x]
 
+getParamByKey :: Name -> PyExp
+getParamByKey key = Index (Var "self.sizes") (IdxExp $ String $ prettyText key)
+
 kernelConstToExp :: Imp.KernelConst -> PyExp
 kernelConstToExp (Imp.SizeConst key) =
-  Index (Var "self.sizes") (IdxExp $ String $ prettyText key)
+  getParamByKey key
 kernelConstToExp (Imp.SizeMaxConst size_class) =
   Var $ "self.max_" <> prettyString size_class
 
@@ -215,13 +218,11 @@ compileGroupDim (Right kc) = pure $ kernelConstToExp kc
 callKernel :: OpCompiler Imp.OpenCL ()
 callKernel (Imp.GetSize v key) = do
   v' <- compileVar v
-  stm $ Assign v' $ kernelConstToExp $ Imp.SizeConst key
+  stm $ Assign v' $ getParamByKey key
 callKernel (Imp.CmpSizeLe v key x) = do
   v' <- compileVar v
   x' <- compileExp x
-  stm $
-    Assign v' $
-      BinOp "<=" (kernelConstToExp (Imp.SizeConst key)) x'
+  stm $ Assign v' $ BinOp "<=" (getParamByKey key) x'
 callKernel (Imp.GetSizeMax v size_class) = do
   v' <- compileVar v
   stm $ Assign v' $ kernelConstToExp $ Imp.SizeMaxConst size_class