[CHERIOT] Fix legalization of [US]INT_TO_FP nodes for the new CHERIOT ABI.

SelectionDAG uses the input type rather than the output type to determine whether
they should be expanded.

Author: resistor

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

@@ -738,6 +738,7 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
     // These require custom lowering because their inputs might be f64.
     setOperationAction({ISD::SELECT_CC, ISD::SETCC}, MVT::i32, Custom);
     setOperationAction({ISD::FP_TO_UINT, ISD::FP_TO_SINT}, MVT::i32, LibCall);
+    setOperationAction({ISD::UINT_TO_FP, ISD::SINT_TO_FP}, MVT::i32, LibCall);
 
     static const unsigned CheriotF64ExpandOps[] = {
         ISD::FMINNUM,     ISD::FMAXNUM,     ISD::FADD,        ISD::FSUB,
@@ -747,7 +748,7 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
         ISD::SETCC,       ISD::FMAXIMUM,    ISD::FMINIMUM,    ISD::STRICT_FADD,
         ISD::STRICT_FSUB, ISD::STRICT_FMUL, ISD::STRICT_FDIV, ISD::STRICT_FSQRT,
         ISD::STRICT_FMA,  ISD::FNEG,        ISD::FABS,        ISD::FCOPYSIGN,
-        ISD::UINT_TO_FP,  ISD::SINT_TO_FP,  ISD::BR_CC};
+        ISD::BR_CC};
     setOperationAction(CheriotF64ExpandOps, MVT::f64, Expand);
     setCondCodeAction(FPCCToExpand, MVT::f64, Expand);
   }

llvm/test/CodeGen/RISCV/cheri/cheriot-f64-abi.ll

@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
-; RUN: llc -o - %s --mcpu=cheriot --mtriple=riscv32cheriot-unknown-cheriotrtos -target-abi cheriot -mattr=+xcheri,+xcheriot,+cap-mode | FileCheck %s
+; RUN: llc -o - %s --mcpu=cheriot --mtriple=riscv32cheriot-unknown-cheriotrtos -target-abi cheriot -mattr=+xcheri,+xcheriot,+xcheripurecap | FileCheck %s
 
 target datalayout = "e-m:e-p:32:32-i64:64-n32-S128-pf200:64:64:64:32-A200-P200-G200"
 target triple = "riscv32cheriot-unknown-cheriotrtos"
@@ -271,6 +271,25 @@ entry:
   ret void
 }
 
+; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
+define dso_local noundef double @_Z6test15(i32 noundef %a) local_unnamed_addr addrspace(200) #0 {
+; CHECK-LABEL: _Z6test15:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    ct.cincoffset csp, csp, -16
+; CHECK-NEXT:    ct.csc cra, 8(csp) # 8-byte Folded Spill
+; CHECK-NEXT:  .LBB15_1: # %entry
+; CHECK-NEXT:    # Label of block must be emitted
+; CHECK-NEXT:    ct.auipcc ct2, %cheriot_compartment_hi(__library_import_libcalls___floatunsidf)
+; CHECK-NEXT:    ct.clc ct2, %cheriot_compartment_lo_i(.LBB15_1)(ct2)
+; CHECK-NEXT:    ct.cjalr ct2
+; CHECK-NEXT:    ct.clc cra, 8(csp) # 8-byte Folded Reload
+; CHECK-NEXT:    ct.cincoffset csp, csp, 16
+; CHECK-NEXT:    ct.cret
+entry:
+  %b = uitofp i32 %a to double
+  ret double %b
+}
+
 attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) "cheri-compartment"="qoi_decode" "no-builtin-longjmp" "no-builtin-printf" "no-builtin-setjmp" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="cheriot" "target-features"="+32bit,+c,+e,+m,+relax,+unaligned-scalar-mem,+xcheri,+xcheriot,+zmmul,-a,-b,-d,-experimental-sdext,-experimental-sdtrig,-experimental-smctr,-experimental-ssctr,-experimental-svukte,-experimental-xqcia,-experimental-xqciac,-experimental-xqcicli,-experimental-xqcicm,-experimental-xqcics,-experimental-xqcicsr,-experimental-xqciint,-experimental-xqcilo,-experimental-xqcilsm,-experimental-xqcisls,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-experimental-zvbc32e,-experimental-zvkgs,-f,-h,-i,-sha,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smdbltrp,-smepmp,-smmpm,-smnpm,-smrnmi,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssdbltrp,-ssnpm,-sspm,-ssqosid,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-supm,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-svvptc,-v,-xcheri-norvc,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xmipscmove,-xmipslsp,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zaamo,-zabha,-zacas,-zalrsc,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zicsr,-zifencei,-zihintntl,-zihintpause,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b" }
 attributes #1 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) "cheri-compartment"="qoi_decode" "no-builtin-longjmp" "no-builtin-printf" "no-builtin-setjmp" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="cheriot" "target-features"="+32bit,+c,+e,+m,+relax,+unaligned-scalar-mem,+xcheri,+xcheriot,+zmmul,-a,-b,-d,-experimental-sdext,-experimental-sdtrig,-experimental-smctr,-experimental-ssctr,-experimental-svukte,-experimental-xqcia,-experimental-xqciac,-experimental-xqcicli,-experimental-xqcicm,-experimental-xqcics,-experimental-xqcicsr,-experimental-xqciint,-experimental-xqcilo,-experimental-xqcilsm,-experimental-xqcisls,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-experimental-zvbc32e,-experimental-zvkgs,-f,-h,-i,-sha,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smdbltrp,-smepmp,-smmpm,-smnpm,-smrnmi,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssdbltrp,-ssnpm,-sspm,-ssqosid,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-supm,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-svvptc,-v,-xcheri-norvc,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xmipscmove,-xmipslsp,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zaamo,-zabha,-zacas,-zalrsc,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zicsr,-zifencei,-zihintntl,-zihintpause,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b" }
 attributes #2 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) "cheri-compartment"="qoi_decode" "no-builtin-longjmp" "no-builtin-printf" "no-builtin-setjmp" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="cheriot" "target-features"="+32bit,+c,+e,+m,+relax,+unaligned-scalar-mem,+xcheri,+xcheriot,+zmmul,-a,-b,-d,-experimental-sdext,-experimental-sdtrig,-experimental-smctr,-experimental-ssctr,-experimental-svukte,-experimental-xqcia,-experimental-xqciac,-experimental-xqcicli,-experimental-xqcicm,-experimental-xqcics,-experimental-xqcicsr,-experimental-xqciint,-experimental-xqcilo,-experimental-xqcilsm,-experimental-xqcisls,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-experimental-zvbc32e,-experimental-zvkgs,-f,-h,-i,-sha,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smdbltrp,-smepmp,-smmpm,-smnpm,-smrnmi,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssdbltrp,-ssnpm,-sspm,-ssqosid,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-supm,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-svvptc,-v,-xcheri-norvc,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xmipscmove,-xmipslsp,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zaamo,-zabha,-zacas,-zalrsc,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zicsr,-zifencei,-zihintntl,-zihintpause,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b" }