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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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8
lib/wasm/src/environ/dummy.rs
View File

@@ -2,7 +2,7 @@
//! wasm translation.
use cranelift_codegen::cursor::FuncCursor;
use cranelift_codegen::ir::immediates::{Imm64, Offset32};
use cranelift_codegen::ir::immediates::{Offset32, Uimm64};
use cranelift_codegen::ir::types::*;
use cranelift_codegen::ir::{self, InstBuilder};
use cranelift_codegen::isa::TargetFrontendConfig;
@@ -195,7 +195,7 @@ impl<'dummy_environment> FuncEnvironment for DummyFuncEnvironment<'dummy_environ
func.create_heap(ir::HeapData {
base: gv,
min_size: 0.into(),
guard_size: 0x8000_0000.into(),
offset_guard_size: 0x8000_0000.into(),
style: ir::HeapStyle::Static {
bound: 0x1_0000_0000.into(),
},
@@ -221,9 +221,9 @@ impl<'dummy_environment> FuncEnvironment for DummyFuncEnvironment<'dummy_environ
func.create_table(ir::TableData {
base_gv,
min_size: Imm64::new(0),
min_size: Uimm64::new(0),
bound_gv,
element_size: Imm64::new(i64::from(self.pointer_bytes()) * 2),
element_size: Uimm64::from(u64::from(self.pointer_bytes()) * 2),
index_type: I32,
})
}