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cranelift: Remove brz and brnz (#5630)

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Remove the brz and brnz instructions, as their behavior is now redundant with brif.
This commit is contained in:
Trevor Elliott
2023-01-30 12:34:56 -08:00
committed by GitHub
parent 77cf547f41
commit a5698cedf8
247 changed files with 2947 additions and 3754 deletions
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16
cranelift/codegen/src/legalizer/mod.rs
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@@ -268,8 +268,7 @@ fn expand_cond_trap(
//
// Becomes:
//
// brz arg, new_block_resume
// jump new_block_trap
// brif arg, new_block_trap, new_block_resume
//
// new_block_trap:
// trap
@@ -285,17 +284,18 @@ fn expand_cond_trap(
// Replace trap instruction by the inverted condition.
if trapz {
func.dfg.replace(inst).brnz(arg, new_block_resume, &[]);
func.dfg
.replace(inst)
.brif(arg, new_block_resume, &[], new_block_trap, &[]);
} else {
func.dfg.replace(inst).brz(arg, new_block_resume, &[]);
func.dfg
.replace(inst)
.brif(arg, new_block_trap, &[], new_block_resume, &[]);
}
// Add jump instruction after the inverted branch.
// Insert the new label and the unconditional trap terminator.
let mut pos = FuncCursor::new(func).after_inst(inst);
pos.use_srcloc(inst);
pos.ins().jump(new_block_trap, &[]);
// Insert the new label and the unconditional trap terminator.
pos.insert_block(new_block_trap);
match opcode {