[pkg-d-commits] [ldc] 08/95: Support -mcpu switch in LDMD

[Matthias Klumpp]

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mak pushed a commit to annotated tag v1.3.0-beta1
in repository ldc.

commit f34b8abff0794bead4819cc44feb8625c4220658
Author: Martin <noone at nowhere.com>
Date:   Sat Feb 18 23:46:30 2017 +0100

    Support -mcpu switch in LDMD
    
    Ignore `-mcpu=baseline`, forward `-mcpu=native` to LDC and translate
    `-mcpu=avx` to `-mattr=+avx`. Show LLVM's (extensive) help for `-mcpu=?`
    (which is sadly actually printed 3 consecutive times).
---
 driver/ldmd.cpp | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/driver/ldmd.cpp b/driver/ldmd.cpp
index 905a8cb..a87c75d 100644
--- a/driver/ldmd.cpp
+++ b/driver/ldmd.cpp
@@ -207,8 +207,12 @@ Where:\n\
   -main            add default main() (e.g. for unittesting)\n\
   -man             open web browser on manual page\n"
 #if 0
-"  -map             generate linker .map file\n\
-  -mscrtlib=<name> MS C runtime library to reference from main/WinMain/DllMain\n"
+"  -map             generate linker .map file\n"
+#endif
+"  -mcpu=<id>       generate instructions for architecture identified by 'id'\n\
+  -mcpu=?          list all architecture options\n"
+#if 0
+"  -mscrtlib=<name> MS C runtime library to reference from main/WinMain/DllMain\n"
 #endif
 "  -noboundscheck   no array bounds checking (deprecated, use -boundscheck=off)\n\
   -O               optimize\n\
@@ -435,6 +439,20 @@ void translateArgs(size_t originalArgc, char **originalArgv,
         } else {
           goto Lerror;
         }
+      } else if (strcmp(p + 1, "mcpu=?") == 0) {
+        const char *mcpuargs[] = {ldcPath.c_str(), "-mcpu=help", nullptr};
+        execute(ldcPath, mcpuargs);
+        exit(EXIT_SUCCESS);
+      } else if (memcmp(p + 1, "mcpu=", 5) == 0) {
+        if (strcmp(p + 6, "baseline") == 0) {
+          // ignore
+        } else if (strcmp(p + 6, "avx") == 0) {
+          ldcArgs.push_back("-mattr=+avx");
+        } else if (strcmp(p + 6, "native") == 0) {
+          ldcArgs.push_back(p);
+        } else {
+          goto Lerror;
+        }
       } else if (strcmp(p + 1, "transition=?") == 0) {
         const char *transitionargs[] = {ldcPath.c_str(), p, nullptr};
         execute(ldcPath, transitionargs);

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