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cranelift: Restrict br_table to i32 indices (#4510)

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* cranelift: Restrict `br_table` to `i32` indices

In #4498 it was proposed that we should only accept `i32` indices
to `br_table`. The rationale for this is that larger types lead the
users to a false sense of flexibility (since we don't support jump
tables larger than u32's), and narrower types are not well tested
paths that would be safer if we removed them.

* cranelift: Reduce directly from i128 to i32 in Switch
This commit is contained in:
Afonso Bordado
2022-07-23 00:32:40 +01:00
committed by GitHub
parent f1a0c40a53
commit af62037f62
10 changed files with 76 additions and 175 deletions
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2
cranelift/filetests/filetests/licm/rewrite-jump-table.clif
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@@ -5,7 +5,7 @@ function %rewrite_jump_table() {
jt0 = jump_table [block1, block2]
block0:
v0 = iconst.i64 1
v0 = iconst.i32 1
br_table v0, block1, jt0
block1: