Commit 9c04ff91 authored Jan 15, 2021 by Iain Ireland

Bug 1686702: Fold to MToNumberInt32 r=jandem

Depends on D101825

Differential Revision: https://phabricator.services.mozilla.com/D101857

parent a4c4772b

js/src/jit-test/tests/warp/bug1686702.js

0 → 100644

+3 −0

Original line number	Original line	Diff line number	Diff line
			for (var j = 0; j < 100; j++) {
			+(Math.fround(1) && 0);
			}

js/src/jit/MIR.cpp

+7 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1703,6 +1703,13 @@ MDefinition* MUnbox::foldsTo(TempAllocator& alloc) {

	return MToDouble::New(alloc, unboxed);		return MToDouble::New(alloc, unboxed);
	}		}

			// MUnbox<Int32>(MBox<Double>(x)) will always fail, even if x can be
			// represented as an Int32. Fold to avoid unnecessary bailouts.
			if (type() == MIRType::Int32 && unboxed->type() == MIRType::Double) {
			return MToNumberInt32::New(alloc, unboxed,
			IntConversionInputKind::NumbersOnly);
			}
	}		}

	return this;		return this;