fallback: legalize: G_STRICT

fallback: legalize: G_STRICT_FMUL s32

Run:	main-04ca53e65f-20261014-105623
Kind:	fallback
Category:	legalize: G_STRICT_FMUL s32
Occurrences:	24 in 6 configs, 1 test files
Snippet from:	float-arith-strict.ll @fmul_s via llvm-extract
Config:	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
Local check:	reproduces at 04ca53e65f
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

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

; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare float @llvm.experimental.constrained.fmul.f32(float, float, metadata, 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 legalize instruction: %2:_(s32) = G_STRICT_FMUL %0:_, %1:_ (in function: fmul_s)
warning: Instruction selection used fallback path for fmul_s

Occurrences (24):

Input	Function	Config
float-arith-strict.ll	fmul_s	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-arith-strict.ll	fmul_s	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-arith-strict.ll	fmul_s	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.ll	fmul_s	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-arith-strict.ll	fmul_s	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-arith-strict.ll	fmul_s	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.061d49df8c.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-arith-strict.0a69e0fb2a.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.1d43ee910a.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-arith-strict.3a9793c8b7.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-arith-strict.5955097c5c.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.59c4db811b.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-arith-strict.6e0fa93e27.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.a690b1bb28.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.ab3f53576f.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-arith-strict.ae4940635d.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-arith-strict.b1620ca0bf.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-arith-strict.c50ed0efe5.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-arith-strict.c9a35d947c.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.d2a562936e.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.da923cde62.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-arith-strict.df67525a22.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-arith-strict.e28ebc27e3.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-arith-strict.ea76ad9138.ll (mutant of float-arith-strict.ll)	fmul_s	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`

Generated 2026-10-15 08:05 UTC.