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Summary

  1. [RISCV] Fix passing two floating-point values in complex separately by two GPRs on RV64 (details)
Commit 7ee479a760e0a4402b4eb7fb6168768a44f66945 by tclin914
[RISCV] Fix passing two floating-point values in complex separately by two GPRs on RV64

Summary:
This patch fixed the error of counting the remaining FPRs. Complex floating-point
values should be passed by two FPRs for the hard-float ABI. If no two FPRs are
available, it should be passed via a 64-bit GPR (fp+fp). `ArgFPRsLeft` is only
decreased one while the type is complex floating-point. It causes two floating-point
values in the complex are passed separately by two GPRs.

Reviewers: asb, luismarques, lenary

Reviewed By: asb

Subscribers: rbar, johnrusso, simoncook, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, psnobl, benna, s.egerton, pzheng, sameer.abuasal, apazos, evandro, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D79770
The file was modifiedclang/lib/CodeGen/TargetInfo.cpp
The file was modifiedclang/test/CodeGen/riscv64-lp64-abi.c
The file was modifiedclang/test/CodeGen/riscv64-lp64f-lp64d-abi.c