This corrects the case when we need to allocate a
blocked register, but the blockage happens after a
use as an instruction input, and there's no place to
split before that.
BUG=v8:5888
Review-Url: https://codereview.chromium.org/2652153005
Cr-Original-Commit-Position: refs/heads/master@{#42706}
Committed: ca779b29a6
Review-Url: https://codereview.chromium.org/2652153005
Cr-Commit-Position: refs/heads/master@{#42710}
Reason for revert:
Introduces new crashers, e.g.
load("test/mjsunit/wasm/wasm-constants.js");
load("test/mjsunit/wasm/wasm-module-builder.js");
(function() {
var builder = new WasmModuleBuilder();
builder.addMemory(16, 32, false);
builder.addFunction("test", kSig_i_iii)
.addBodyWithEnd([
// body:
kExprI64Const, 0x42,
kExprI64Const, 0x7a,
kExprI64Ctz,
kExprI64Mul,
kExprI64Ctz,
kExprI64Const, 0x41,
kExprI64Ctz,
kExprI64Ctz,
kExprI64Shl,
kExprI64Const, 0x41,
kExprI64Ctz,
kExprI64Ctz,
kExprI64Shl,
kExprF32SConvertI64,
kExprUnreachable,
kExprEnd, // @20
])
.exportFunc();
var module = builder.instantiate();
module.exports.test(1, 2, 3);
})();
Original issue's description:
> [turbofan] Correct regalloc blocked register behavior
>
>
> This corrects the case when we need to allocate a
> blocked register, but the blockage happens after a
> use as an instruction input, and there's no place to
> split before that.
>
> BUG=v8:5888
>
> Review-Url: https://codereview.chromium.org/2652153005
> Cr-Commit-Position: refs/heads/master@{#42706}
> Committed: ca779b29a6TBR=bmeurer@chromium.org,jarin@chromium.org,mtrofin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5888
Review-Url: https://codereview.chromium.org/2654993007
Cr-Commit-Position: refs/heads/master@{#42707}
This corrects the case when we need to allocate a
blocked register, but the blockage happens after a
use as an instruction input, and there's no place to
split before that.
BUG=v8:5888
Review-Url: https://codereview.chromium.org/2652153005
Cr-Commit-Position: refs/heads/master@{#42706}
