Source: Upstream
Upstream: 5d61fa4e68b7eb6d481a37efdbb35fdce675a6ad
Reason: Fixes compilation with llvm6

--- src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
+++ src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
@@ -830,7 +830,11 @@ lp_create_builder(LLVMContextRef ctx, enum lp_float_mode float_mode)
       llvm::unwrap(builder)->setFastMathFlags(flags);
       break;
    case LP_FLOAT_MODE_UNSAFE_FP_MATH:
+#if HAVE_LLVM >= 0x0600
+      flags.setFast();
+#else
       flags.setUnsafeAlgebra();
+#endif
       llvm::unwrap(builder)->setFastMathFlags(flags);
       break;
    }
-- 
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