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Move the cast_float_to_int fallback code to GCC

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Now that we require at least LLVM 13, that codegen backend is always
using its intrinsic `fptosi.sat` and `fptoui.sat` conversions, so it
doesn't need the manual implementation. However, the GCC backend still
needs it, so we can move all of that code down there.
This commit is contained in:
Josh Stone 2022-08-16 15:46:17 -07:00
parent 5746c752f4
commit 147032a618
6 changed files with 177 additions and 170 deletions
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13
compiler/rustc_codegen_llvm/src/builder.rs
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@ -725,11 +725,11 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
unsafe { llvm::LLVMBuildSExt(self.llbuilder, val, dest_ty, UNNAMED) }
}
fn fptoui_sat(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> Option<&'ll Value> {
fn fptoui_sat(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
self.fptoint_sat(false, val, dest_ty)
}
fn fptosi_sat(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> Option<&'ll Value> {
fn fptosi_sat(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
self.fptoint_sat(true, val, dest_ty)
}
@ -1429,12 +1429,7 @@ impl<'a, 'll, 'tcx> Builder<'a, 'll, 'tcx> {
}
}
fn fptoint_sat(
&mut self,
signed: bool,
val: &'ll Value,
dest_ty: &'ll Type,
) -> Option<&'ll Value> {
fn fptoint_sat(&mut self, signed: bool, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
let src_ty = self.cx.val_ty(val);
let (float_ty, int_ty, vector_length) = if self.cx.type_kind(src_ty) == TypeKind::Vector {
assert_eq!(self.cx.vector_length(src_ty), self.cx.vector_length(dest_ty));
@ -1459,7 +1454,7 @@ impl<'a, 'll, 'tcx> Builder<'a, 'll, 'tcx> {
format!("llvm.{}.sat.i{}.f{}", instr, int_width, float_width)
};
let f = self.declare_cfn(&name, llvm::UnnamedAddr::No, self.type_func(&[src_ty], dest_ty));
Some(self.call(self.type_func(&[src_ty], dest_ty), f, &[val], None))
self.call(self.type_func(&[src_ty], dest_ty), f, &[val], None)
}
pub(crate) fn landing_pad(