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Removed implicit indirection when computing heap base. (#363)

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Fix expected legalized heap_addr
This commit is contained in:
Lachlan Sneff
2018-06-16 10:31:52 -04:00
committed by Dan Gohman
parent f97ad59991
commit b3c3ca331b
2 changed files with 5 additions and 18 deletions
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17
lib/codegen/src/legalizer/heap.rs
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@@ -6,7 +6,7 @@
use cursor::{Cursor, FuncCursor};
use flowgraph::ControlFlowGraph;
use ir::condcodes::IntCC;
use ir::{self, InstBuilder, MemFlags};
use ir::{self, InstBuilder};
use isa::TargetIsa;
/// Expand a `heap_addr` instruction according to the definition of the heap.
@@ -57,13 +57,7 @@ fn dynamic_addr(
pos.use_srcloc(inst);
// Start with the bounds check. Trap if `offset + size > bound`.
let bound_addr = pos.ins().global_value(addr_ty, bound_gv);
let mut mflags = MemFlags::new();
// The bound variable is requied to be accessible and aligned.
mflags.set_notrap();
mflags.set_aligned();
let bound = pos.ins().load(offset_ty, mflags, bound_addr, 0);
let bound = pos.ins().global_value(addr_ty, bound_gv);
let oob;
if size == 1 {
// `offset > bound - 1` is the same as `offset >= bound`.
@@ -163,12 +157,7 @@ fn offset_addr(
match pos.func.heaps[heap].base {
ir::HeapBase::ReservedReg => unimplemented!(),
ir::HeapBase::GlobalValue(base_gv) => {
let base_addr = pos.ins().global_value(addr_ty, base_gv);
let mut mflags = MemFlags::new();
// The base address variable is requied to be accessible and aligned.
mflags.set_notrap();
mflags.set_aligned();
let base = pos.ins().load(addr_ty, mflags, base_addr, 0);
let base = pos.ins().global_value(addr_ty, base_gv);
pos.func.dfg.replace(inst).iadd(base, offset);
}
}