From: Marek Olšák <marek.olsak@amd.com>
Date: Fri, 1 Jul 2016 18:09:47 +0000 (+0200)
Subject: gallivm: set LLVMNoUnwindAttribute on all intrinsics
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d7b6f90684e415b8e9f2d5cd30b9503a7e39a00e;p=mesa.git

gallivm: set LLVMNoUnwindAttribute on all intrinsics

RadeonSI stats: Mostly 0% difference, but Valley shows a small improvement:

 Application            Files    SGPRs     VGPRs   SpillSGPR SpillVGPR Code Size    LDS    Max Waves   Waits
 unigine_valley           278    0.00 %   -0.29 %    0.00 %    0.00 %    0.01 %    0.00 %    0.17 %    0.00 %

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
---

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_intr.c b/src/gallium/auxiliary/gallivm/lp_bld_intr.c
index 0a8f996a63e..f12e735b5ee 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_intr.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_intr.c
@@ -145,8 +145,10 @@ lp_build_intrinsic(LLVMBuilderRef builder,
 
       function = lp_declare_intrinsic(module, name, ret_type, arg_types, num_args);
 
-      if (attr)
-          LLVMAddFunctionAttr(function, attr);
+      /* NoUnwind indicates that the intrinsic never raises a C++ exception.
+       * Set it for all intrinsics.
+       */
+      LLVMAddFunctionAttr(function, attr | LLVMNoUnwindAttribute);
 
       if (gallivm_debug & GALLIVM_DEBUG_IR) {
          lp_debug_dump_value(function);