fallback: translate: call llvm.experimental.constrained.maxnum.f32

Run:	explore-bc8218b282-20261015-075519
Kind:	fallback
Category:	translate: call llvm.experimental.constrained.maxnum.f32
Occurrences:	24 in 6 configs, 2 test files
Snippet from:	float-arith-strict.ll @fmax_s via llvm-extract
Config:	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
Local check:	reproduces at bc8218b282
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind strictfp
define float @fmax_s(float %a, float %b) #0 {
  %1 = call float @llvm.experimental.constrained.maxnum.f32(float %a, float %b, metadata !"fpexcept.strict") #2
  ret float %1
}

; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare float @llvm.experimental.constrained.maxnum.f32(float, float, metadata) #1

attributes #0 = { nounwind strictfp }
attributes #1 = { nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite) }
attributes #2 = { strictfp }

Reproduce:

llc -mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to translate instruction: call llvm.experimental.constrained.maxnum.f32: '  %1 = call float @llvm.experimental.constrained.maxnum.f32(float %a, float %b, metadata !"fpexcept.strict") #2' (in function: fmax_s)
warning: Instruction selection used fallback path for fmax_s

Occurrences (24):

Input	Function	Config
float-arith-strict.ll	fmax_s	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-arith-strict.ll	fmax_s	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-arith-strict.ll	fmax_s	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.ll	fmax_s	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-arith-strict.ll	fmax_s	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-arith-strict.ll	fmax_s	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-intrinsics-strict.ll	maxnum_f32	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-intrinsics-strict.ll	maxnum_f32	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-intrinsics-strict.ll	maxnum_f32	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-intrinsics-strict.ll	maxnum_f32	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-intrinsics-strict.ll	maxnum_f32	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-intrinsics-strict.ll	maxnum_f32	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.16670a4844.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-arith-strict.1c7ee1ef81.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.244521775a.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-arith-strict.3511c5d175.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.3773de6295.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-arith-strict.5ae6f4b52c.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-arith-strict.605f1be745.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-arith-strict.65bb673f10.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-arith-strict.95f6c57e33.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.9d0ab5da0b.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-arith-strict.a71272be6f.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.eba68b6ec9.ll (mutant of float-arith-strict.ll)	fmax_s	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`

Generated 2026-10-15 08:05 UTC.