Add option --hipcc-func-supp for function support (#1957)

By default hipcc passes -mllvm options to let HIP-Clang inline all device functions.

--hipcc-func-supp enables function support and disables inline all.

--hipcc-no-func-supp disable function support and enables inline all.

This is a temporary solution to match HCC behavior for performance.

This option is mainly for debugging purpose.

Change-Id: I0c44ac1812bb3cea5c3e5b6e14ebaa45919236f6

[ROCm/clr commit: 2198aead38]

projects/clr/hipamd/bin/hipcc

@@ -337,6 +337,7 @@ my $buildDeps = 0;
 my $linkType = 1;
 my $setLinkType = 0;
 my $coFormatv3 = 0;
+my $funcSupp = 0;      # enable function support
 
 my @options = ();
 my @inputs  = ();
@@ -600,6 +601,11 @@ foreach $arg (@ARGV)
             #if $arg eq "--hipcc_profile") {  # Example argument here, hipcc
             #
             #}
+            if ($arg eq "--hipcc-func-supp") {
+              $funcSupp = 1;
+            } elsif ($arg eq "--hipcc-no-func-supp") {
+              $funcSupp = 0;
+            }
         } else {
             push (@options, $arg);
         }
@@ -743,7 +749,7 @@ if ($HIP_PLATFORM eq "clang") {
     }
     # Do not pass -mllvm on Windows since there is a clang bug causing duplicate -mllvm options in clang -cc1 on Windows.
     # ToDo : remove restriction for Windows after clang bug is fixed.
-    if ($optArg ne "-O0" and not $isWindows) {
+    if (!$funcSupp and $optArg ne "-O0" and not $isWindows) {
         $HIPCXXFLAGS .= " -mllvm -amdgpu-early-inline-all=true -mllvm -amdgpu-function-calls=false";
         if ($needLDFLAGS and not $needCXXFLAGS) {
             $HIPLDFLAGS .= " -mllvm -amdgpu-early-inline-all=true -mllvm -amdgpu-function-calls=false";