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GlobalISel: Add comment to clarify G_BUILD_VECTOR
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Authored by arsenm on Jan 9 2019, 12:30 AM.

Reviewers

aditya_nandakumar
aemerson

Looks good. Thanks.

This revision is now accepted and ready to land.Jan 9 2019, 8:38 AM

r351428

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include/

llvm/

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	// %0:(s32) = G_MERGE_VALUES %bits_0_7:(s8), %bits_8_15:(s8),			// %0:(s32) = G_MERGE_VALUES %bits_0_7:(s8), %bits_8_15:(s8),
	// %bits_16_23:(s8), %bits_24_31:(s8)			// %bits_16_23:(s8), %bits_24_31:(s8)
	def G_MERGE_VALUES : GenericInstruction {			def G_MERGE_VALUES : GenericInstruction {
	let OutOperandList = (outs type0:$dst);			let OutOperandList = (outs type0:$dst);
	let InOperandList = (ins type1:$src0, variable_ops);			let InOperandList = (ins type1:$src0, variable_ops);
	let hasSideEffects = 0;			let hasSideEffects = 0;
	}			}

	/// Create a vector from multiple scalar registers.			/// Create a vector from multiple scalar registers. No implicit
				/// conversion is performed (i.e. the result element type must be the
				/// same as all source operands)
	def G_BUILD_VECTOR : GenericInstruction {			def G_BUILD_VECTOR : GenericInstruction {
	let OutOperandList = (outs type0:$dst);			let OutOperandList = (outs type0:$dst);
	let InOperandList = (ins type1:$src0, variable_ops);			let InOperandList = (ins type1:$src0, variable_ops);
	let hasSideEffects = 0;			let hasSideEffects = 0;
	}			}

	/// Like G_BUILD_VECTOR, but truncates the larger operand types to fit the			/// Like G_BUILD_VECTOR, but truncates the larger operand types to fit the
	/// destination vector elt type.			/// destination vector elt type.
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