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Support heaps with no offset-guard pages.

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Also, say "guard-offset pages" rather than just "guard pages" to describe the
region of a heap which is never accessible and which exists to support
optimizations for heap accesses with offsets.

And, introduce a `Uimm64` immediate type, and make all heap fields use
`Uimm64` instead of `Imm64` since they really are unsigned.
This commit is contained in:
Dan Gohman
2018-11-29 04:53:30 -08:00
parent 93696a80bb
commit a20c852148
27 changed files with 302 additions and 172 deletions
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cranelift/filetests/regalloc/aliases.clif
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@@ -3,7 +3,7 @@ target x86_64 haswell
function %value_aliases(i32, f32, i64 vmctx) baldrdash {
gv0 = vmctx
heap0 = static gv0, min 0x0001_0000, bound 0x0001_0000_0000, guard 0x8000_0000
heap0 = static gv0, min 0x0001_0000, bound 0x0001_0000_0000, offset_guard 0x8000_0000
ebb0(v0: i32, v1: f32, v2: i64):
v3 = iconst.i32 0