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Rollup merge of #47890 - pftbest:no_trap, r=alexcrichton

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[MSP430] Don't enable trap_unreachable option by default on msp.

Since MSP430 doesn't meaningfully support faulting on illegal
instructions, LLVM generates a call to abort() function instead
of a trap instruction. Such calls are 4 bytes long, and that is
too much overhead for such small target.

r? @alexcrichton
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kennytm 2018-01-31 16:36:17 +08:00 committed by GitHub
commit 3d8279dec7
1 changed files with 6 additions and 0 deletions
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6
src/librustc_back/target/msp430_none_elf.rs
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@ -53,6 +53,12 @@ pub fn target() -> TargetResult {
// don't want to invoke that many gcc instances.
default_codegen_units: Some(1),
// Since MSP430 doesn't meaningfully support faulting on illegal
// instructions, LLVM generates a call to abort() function instead
// of a trap instruction. Such calls are 4 bytes long, and that is
// too much overhead for such small target.
trap_unreachable: false,
.. Default::default( )
}
})