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rust_llvm: Add way to reflectively ask if a ValueRef is a known constant int.

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Add option-returning variants to `const_to_int`/`const_to_uint` that
never assert fail. (These will be used for overflow checking from
rustc_trans::trans::consts.)
This commit is contained in:
Felix S. Klock II 2015-03-27 01:37:10 +01:00
parent 7875dae83f
commit 2e93e386fd
2 changed files with 27 additions and 0 deletions
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src/librustc_llvm/lib.rs
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@ -1976,6 +1976,7 @@ extern {
pub fn LLVMIsAArgument(value_ref: ValueRef) -> ValueRef;
pub fn LLVMIsAAllocaInst(value_ref: ValueRef) -> ValueRef;
pub fn LLVMIsAConstantInt(value_ref: ValueRef) -> ValueRef;
pub fn LLVMInitializeX86TargetInfo();
pub fn LLVMInitializeX86Target();