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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/reload-208.clif
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@@ -13,7 +13,7 @@ target x86_64 haswell
function %pr208(i64 vmctx [%rdi]) system_v {
gv1 = vmctx
gv0 = iadd_imm.i64 gv1, -8
heap0 = static gv0, min 0, bound 0x5000, guard 0x0040_0000
heap0 = static gv0, min 0, bound 0x5000, offset_guard 0x0040_0000
sig0 = (i64 vmctx [%rdi]) -> i32 [%rax] system_v
sig1 = (i64 vmctx [%rdi], i32 [%rsi]) system_v
fn0 = u0:1 sig0