gallivm: Improve debug output (V2)

Improve debug output from gallivm_compile_module and
lp_build_create_jit_compiler_for_module, printing the
-mcpu and -mattr options passed to LLC.

V2: enclose MAttrs debug_printf block and llc -mcpu debug_printf
in "if (gallivm_debug & <flags>)..."

Signed-off-by: Ben Crocker <bcrocker@redhat.com>
Cc: 12.0 13.0 17.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Roland Scheidegger <sroland@vmware.com> (v2)
[Emil Velikov: rebase]
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

(cherry picked from commit a8e9c630f3dc656d107c4252b90c8e991438a3c4)

2 files changed, 18 insertions, 1 deletions

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_init.c b/src/gallium/auxiliary/gallivm/lp_bld_init.c
index d1b2369f34a..fed43e99e60 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_init.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_init.c
@@ -606,7 +606,10 @@ gallivm_compile_module(struct gallivm_state *gallivm)
       util_snprintf(filename, sizeof(filename), "ir_%s.bc", gallivm->module_name);
       LLVMWriteBitcodeToFile(gallivm->module, filename);
       debug_printf("%s written\n", filename);
-      debug_printf("Invoke as \"llc -o - %s\"\n", filename);
+      debug_printf("Invoke as \"llc %s%s -o - %s\"\n",
+                   (HAVE_LLVM >= 0x0305) ? "[-mcpu=<-mcpu option] " : "",
+                   "[-mattr=<-mattr option(s)>]",
+                   filename);
    }
 
    if (USE_MCJIT) {
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
index 791a4702556..d13039c0507 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
+++ b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
@@ -98,6 +98,7 @@
 #include "util/u_cpu_detect.h"
 
 #include "lp_bld_misc.h"
+#include "lp_bld_debug.h"
 
 namespace {
 
@@ -609,6 +610,16 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
 
    builder.setMAttrs(MAttrs);
 
+   if (gallivm_debug & (GALLIVM_DEBUG_IR | GALLIVM_DEBUG_ASM | GALLIVM_DEBUG_DUMP_BC)) {
+      int n = MAttrs.size();
+      if (n > 0) {
+         debug_printf("llc -mattr option(s): ");
+         for (int i = 0; i < n; i++)
+            debug_printf("%s%s", MAttrs[i].c_str(), (i < n - 1) ? "," : "");
+         debug_printf("\n");
+      }
+   }
+
 #if HAVE_LLVM >= 0x0305
    StringRef MCPU = llvm::sys::getHostCPUName();
    /*
@@ -624,6 +635,9 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
     * can't handle. Not entirely sure if we really need to do anything yet.
     */
    builder.setMCPU(MCPU);
+   if (gallivm_debug & (GALLIVM_DEBUG_IR | GALLIVM_DEBUG_ASM | GALLIVM_DEBUG_DUMP_BC)) {
+      debug_printf("llc -mcpu option: %s\n", MCPU.str().c_str());
+   }
 #endif
 
    ShaderMemoryManager *MM = NULL;