llvm-project

e2ce7a69 - [AArch64] Lower rmw sub to FNEG+LDFADD when LSFE present (#220568)

[AArch64] Lower rmw sub to FNEG+LDFADD when LSFE present (#220568) This patch enables `atomicrmw sub` nodes to be lowered into FNEG+LD(B)FADD instructions when LSFE is present and we are not in strictfp environment. Additionally, this patch fixes a bug which allowed atomicrmw with fp128 to be considered legal when LSFE present.