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[SelectionDAG] Support promotion of the FPOWI integer operand

Description

[SelectionDAG] Support promotion of the FPOWI integer operand

For targets where i32 is not a legal type (e.g. 64-bit RISC-V),
LegalizeIntegerTypes must promote the integer operand of ISD::FPOWI. As this
is a signed value, this should be sign-extended.

This patch enables all tests in test/CodeGen/RISCVfloat-intrinsics.ll for
RV64, as prior to this patch that file couldn't be compiled for RV64 due to an
assertion when performing codegen for fpowi.

Differential Revision: https://reviews.llvm.org/D54574

Details

Committed
asbJan 31 2019, 7:46 PM
Differential Revision
D54574: [SelectionDAG] Support promotion of the FPOWI integer operand
Parents
rL352831: [SemaCXX] Param diagnostic matches overload logic
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