Auto merge of #46486 - scottmcm:i128-target-option, r=nagisa
Add an i128_lowering flag in TargetOptions Not actually enabled by default anywhere yet. r? @nagisa cc #45676 @est31
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1a8282a9b4
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@ -1176,9 +1176,10 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
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saturating_float_casts: bool = (false, parse_bool, [TRACKED],
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saturating_float_casts: bool = (false, parse_bool, [TRACKED],
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"make float->int casts UB-free: numbers outside the integer type's range are clipped to \
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"make float->int casts UB-free: numbers outside the integer type's range are clipped to \
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the max/min integer respectively, and NaN is mapped to 0"),
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the max/min integer respectively, and NaN is mapped to 0"),
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lower_128bit_ops: bool = (false, parse_bool, [TRACKED],
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lower_128bit_ops: Option<bool> = (None, parse_opt_bool, [TRACKED],
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"rewrite operators on i128 and u128 into lang item calls (typically provided \
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"rewrite operators on i128 and u128 into lang item calls (typically provided \
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by compiler-builtins) so translation doesn't need to support them"),
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by compiler-builtins) so translation doesn't need to support them,
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overriding the default for the current target"),
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}
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}
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pub fn default_lib_output() -> CrateType {
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pub fn default_lib_output() -> CrateType {
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@ -453,6 +453,10 @@ pub struct TargetOptions {
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/// Whether library functions call lowering/optimization is disabled in LLVM
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/// Whether library functions call lowering/optimization is disabled in LLVM
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/// for this target unconditionally.
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/// for this target unconditionally.
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pub no_builtins: bool,
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pub no_builtins: bool,
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/// Whether to lower 128-bit operations to compiler_builtins calls. Use if
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/// your backend only supports 64-bit and smaller math.
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pub i128_lowering: bool,
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}
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}
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impl Default for TargetOptions {
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impl Default for TargetOptions {
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@ -521,6 +525,7 @@ impl Default for TargetOptions {
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requires_lto: false,
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requires_lto: false,
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singlethread: false,
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singlethread: false,
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no_builtins: false,
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no_builtins: false,
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i128_lowering: false,
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}
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}
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}
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}
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}
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}
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@ -25,7 +25,9 @@ impl MirPass for Lower128Bit {
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tcx: TyCtxt<'a, 'tcx, 'tcx>,
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tcx: TyCtxt<'a, 'tcx, 'tcx>,
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_src: MirSource,
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_src: MirSource,
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mir: &mut Mir<'tcx>) {
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mir: &mut Mir<'tcx>) {
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if !tcx.sess.opts.debugging_opts.lower_128bit_ops {
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let debugging_override = tcx.sess.opts.debugging_opts.lower_128bit_ops;
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let target_default = tcx.sess.host.options.i128_lowering;
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if !debugging_override.unwrap_or(target_default) {
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return
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return
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}
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}
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@ -13,7 +13,7 @@
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// ignore-asmjs
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// ignore-asmjs
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// ignore-emscripten
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// ignore-emscripten
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// compile-flags: -Z lower_128bit_ops -C debug_assertions=yes
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// compile-flags: -Z lower_128bit_ops=yes -C debug_assertions=yes
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#![feature(i128_type)]
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#![feature(i128_type)]
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@ -13,7 +13,7 @@
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// ignore-asmjs
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// ignore-asmjs
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// ignore-emscripten
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// ignore-emscripten
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// compile-flags: -Z lower_128bit_ops -C debug_assertions=no
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// compile-flags: -Z lower_128bit_ops=yes -C debug_assertions=no
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#![feature(i128_type)]
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#![feature(i128_type)]
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