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Address review comments.

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This commit is contained in:
Benjamin Bouvier
2020-08-21 12:40:47 +02:00
parent ee76e01efc
commit 7c85654285
4 changed files with 300 additions and 263 deletions
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7
cranelift/codegen/src/isa/x64/inst/mod.rs
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@@ -360,6 +360,13 @@ pub enum Inst {
JmpKnown { dst: BranchTarget },
/// One-way conditional branch: jcond cond target.
///
/// This instruction is useful when we have conditional jumps depending on more than two
/// conditions, see for instance the lowering of Brz/brnz with Fcmp inputs.
///
/// A note of caution: in contexts where the branch target is another block, this has to be the
/// same successor as the one specified in the terminator branch of the current block.
/// Otherwise, this might confuse register allocation by creating new invisible edges.
JmpIf { cc: CC, taken: BranchTarget },
/// Two-way conditional branch: jcond cond target target.