nixpkgs/pkgs/development/compilers/llvm/8/clang/HIP-use-PATH-8.patch

From d9f1b7d7571b252e0ba2359ae6cfa93a9903c0e7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Holger=20W=C3=BCnsche?= <holger.o.wuensche@t-online.de>
Date: Tue, 21 Jan 2020 19:49:44 +0100
Subject: [PATCH] [HIP] use GetProgramPath for executable discovery

This change replaces the manual building of executable paths
using llvm::sys::path::append with GetProgramPath.
This enables adding other paths in case executables reside
in different directories and makes the code easier to read.

Differential Revision: https://reviews.llvm.org/D72903
---
 clang/lib/Driver/ToolChains/HIP.cpp | 23 ++++++++---------------
 1 file changed, 8 insertions(+), 15 deletions(-)

diff --git a/lib/Driver/ToolChains/HIP.cpp b/lang/lib/Driver/ToolChains/HIP.cpp
index 868765cf88e..31f2d68ec6c 100644
--- a/lib/Driver/ToolChains/HIP.cpp
+++ b/lib/Driver/ToolChains/HIP.cpp
@@ -104,9 +104,8 @@ const char *AMDGCN::Linker::constructLLVMLinkCommand(
   const char *OutputFileName =
       C.addTempFile(C.getArgs().MakeArgString(TmpName));
   CmdArgs.push_back(OutputFileName);
-  SmallString<128> ExecPath(C.getDriver().Dir);
-  llvm::sys::path::append(ExecPath, "llvm-link");
-  const char *Exec = Args.MakeArgString(ExecPath);
+  const char *Exec =
+      Args.MakeArgString(getToolChain().GetProgramPath("llvm-link"));
   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
   return OutputFileName;
 }
@@ -147,9 +146,8 @@ const char *AMDGCN::Linker::constructOptCommand(
   const char *OutputFileName =
       C.addTempFile(C.getArgs().MakeArgString(TmpFileName));
   OptArgs.push_back(OutputFileName);
-  SmallString<128> OptPath(C.getDriver().Dir);
-  llvm::sys::path::append(OptPath, "opt");
-  const char *OptExec = Args.MakeArgString(OptPath);
+  const char *OptExec =
+      Args.MakeArgString(getToolChain().GetProgramPath("opt"));
   C.addCommand(llvm::make_unique<Command>(JA, *this, OptExec, OptArgs, Inputs));
   return OutputFileName;
 }
@@ -167,9 +165,7 @@ const char *AMDGCN::Linker::constructLlcCommand(
   const char *LlcOutputFile =
       C.addTempFile(C.getArgs().MakeArgString(LlcOutputFileName));
   LlcArgs.push_back(LlcOutputFile);
-  SmallString<128> LlcPath(C.getDriver().Dir);
-  llvm::sys::path::append(LlcPath, "llc");
-  const char *Llc = Args.MakeArgString(LlcPath);
+  const char *Llc = Args.MakeArgString(getToolChain().GetProgramPath("llc"));
   C.addCommand(llvm::make_unique<Command>(JA, *this, Llc, LlcArgs, Inputs));
   return LlcOutputFile;
 }
@@ -184,9 +180,7 @@ void AMDGCN::Linker::constructLldCommand(Compilation &C, const JobAction &JA,
   ArgStringList LldArgs{"-flavor",    "gnu", "--no-undefined",
                         "-shared",    "-o",  Output.getFilename(),
                         InputFileName};
-  SmallString<128> LldPath(C.getDriver().Dir);
-  llvm::sys::path::append(LldPath, "lld");
-  const char *Lld = Args.MakeArgString(LldPath);
+  const char *Lld = Args.MakeArgString(getToolChain().GetProgramPath("lld"));
   C.addCommand(llvm::make_unique<Command>(JA, *this, Lld, LldArgs, Inputs));
 }
 
@@ -218,9 +212,8 @@ void AMDGCN::constructHIPFatbinCommand(Compilation &C, const JobAction &JA,
       Args.MakeArgString(std::string("-outputs=").append(OutputFileName));
   BundlerArgs.push_back(BundlerOutputArg);
 
-  SmallString<128> BundlerPath(C.getDriver().Dir);
-  llvm::sys::path::append(BundlerPath, "clang-offload-bundler");
-  const char *Bundler = Args.MakeArgString(BundlerPath);
+  const char *Bundler = Args.MakeArgString(
+          T.getToolChain().GetProgramPath("clang-offload-bundler"));
   C.addCommand(llvm::make_unique<Command>(JA, T, Bundler, BundlerArgs, Inputs));
 }
 
-- 
2.23.1