bjoernager/rust
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Disable LLVM's new fptoint intrinsics on riscv64

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Looks like this platform still isn't quite working yet due to
https://bugs.llvm.org/show_bug.cgi?id=50083
This commit is contained in:
Alex Crichton 2021-04-22 14:33:45 -07:00
parent de2a4601ab
commit 35ae752231
1 changed files with 10 additions and 2 deletions
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12
compiler/rustc_codegen_llvm/src/builder.rs
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@ -670,7 +670,7 @@ impl BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
}
fn fptoui_sat(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> Option<&'ll Value> {
if llvm_util::get_version() >= (12, 0, 0) {
if llvm_util::get_version() >= (12, 0, 0) && !self.fptoint_sat_broken_in_llvm() {
let src_ty = self.cx.val_ty(val);
let float_width = self.cx.float_width(src_ty);
let int_width = self.cx.int_width(dest_ty);
@ -683,7 +683,7 @@ impl BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
}
fn fptosi_sat(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> Option<&'ll Value> {
if llvm_util::get_version() >= (12, 0, 0) {
if llvm_util::get_version() >= (12, 0, 0) && !self.fptoint_sat_broken_in_llvm() {
let src_ty = self.cx.val_ty(val);
let float_width = self.cx.float_width(src_ty);
let int_width = self.cx.int_width(dest_ty);
@ -1387,4 +1387,12 @@ impl Builder<'a, 'll, 'tcx> {
llvm::LLVMAddIncoming(phi, &val, &bb, 1 as c_uint);
}
}
fn fptoint_sat_broken_in_llvm(&self) -> bool {
match self.tcx.sess.target.arch.as_str() {
// FIXME - https://bugs.llvm.org/show_bug.cgi?id=50083
"riscv64" => llvm_util::get_version() < (13, 0, 0),
_ => false,
}
}
}