properly handle the case when LLVM does not have min/maxnum

rust-lang · Mar 22, 2018 · 0118a65 · 0118a65
1 parent 88268d7
commit 0118a65
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/src/librustc_trans/builder.rs b/src/librustc_trans/builder.rs
@@ -914,15 +914,19 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         self.count_insn("minnum");
         unsafe {
             let instr = llvm::LLVMRustBuildMinNum(self.llbuilder, lhs, rhs);
-            bug!("LLVMRustBuildMinNum is not available in LLVM version < 6.0");
+            if instr.is_null() {
+                bug!("LLVMRustBuildMinNum is not available in LLVM version < 6.0");
+            }
             instr
         }
     }
     pub fn maxnum(&self, lhs: ValueRef, rhs: ValueRef) -> ValueRef {
         self.count_insn("maxnum");
         unsafe {
             let instr = llvm::LLVMRustBuildMaxNum(self.llbuilder, lhs, rhs);
-            bug!("LLVMRustBuildMaxNum is not available in LLVM version < 6.0");
+            if instr.is_null() {
+                bug!("LLVMRustBuildMaxNum is not available in LLVM version < 6.0");
+            }
             instr
         }
     }