fallback: legalize: G_STRICT

fallback: legalize: G_STRICT_FSQRT s32

Run:	main-04ca53e65f-20261014-113325
Kind:	fallback
Category:	legalize: G_STRICT_FSQRT s32
Occurrences:	18 in 6 configs, 2 test files
Snippet from:	float-arith-strict.ll @fsqrt_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 @fsqrt_s(float %a) #0 {
  %1 = call float @llvm.experimental.constrained.sqrt.f32(float %a, 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.sqrt.f32(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: %1:_(s32) = G_STRICT_FSQRT %0:_ (in function: fsqrt_s)
warning: Instruction selection used fallback path for fsqrt_s

Occurrences (18):

Input	Function	Config
float-arith-strict.ll	fsqrt_s	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-arith-strict.ll	fsqrt_s	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-arith-strict.ll	fsqrt_s	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.ll	fsqrt_s	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-arith-strict.ll	fsqrt_s	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-arith-strict.ll	fsqrt_s	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-intrinsics-strict.ll	sqrt_f32	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-intrinsics-strict.ll	sqrt_f32	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-intrinsics-strict.ll	sqrt_f32	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-intrinsics-strict.ll	sqrt_f32	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-intrinsics-strict.ll	sqrt_f32	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-intrinsics-strict.ll	sqrt_f32	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.1a658f9a1f.ll (mutant of float-arith-strict.ll)	fsqrt_s	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-arith-strict.4486ea3099.ll (mutant of float-arith-strict.ll)	fsqrt_s	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-arith-strict.5e6aadc0d1.ll (mutant of float-arith-strict.ll)	fsqrt_s	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-arith-strict.6a0cf56df0.ll (mutant of float-arith-strict.ll)	fsqrt_s	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.9f78c7ad22.ll (mutant of float-arith-strict.ll)	fsqrt_s	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-arith-strict.f387ca7754.ll (mutant of float-arith-strict.ll)	fsqrt_s	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`

Generated 2026-10-15 08:05 UTC.