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| -rw-r--r-- | src/builder.rs | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/builder.rs b/src/builder.rs index 30e13ddce91..89e5cf1b8c6 100644 --- a/src/builder.rs +++ b/src/builder.rs @@ -1907,6 +1907,15 @@ impl<'a, 'gcc, 'tcx> Builder<'a, 'gcc, 'tcx> { v2: RValue<'gcc>, mask: RValue<'gcc>, ) -> RValue<'gcc> { + // NOTE: if the `mask` is a constant value, the following code will copy it in many places, + // which will make GCC create a lot (+4000) local variables in some cases. + // So we assign it to an explicit local variable once to avoid this. + let func = self.current_func(); + let mask_var = func.new_local(self.location, mask.get_type(), "mask"); + let block = self.block; + block.add_assignment(self.location, mask_var, mask); + let mask = mask_var.to_rvalue(); + // TODO(antoyo): use a recursive unqualified() here. let vector_type = v1.get_type().unqualified().dyncast_vector().expect("vector type"); let element_type = vector_type.get_element_type(); |