fallback: legalize: G

fallback: legalize: G_FMAXIMUM s32

Run:	explore-04ca53e65f-20261014-114124
Kind:	fallback
Category:	legalize: G_FMAXIMUM s32
Occurrences:	56 in 8 configs, 1 test files
Snippet from:	float-maximum-minimum.ll @fmaximum_f32 via llvm-extract
Config:	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32f`
Local check:	reproduces at 04ca53e65f
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind
define float @fmaximum_f32(float %a, float %b) #0 {
  %1 = call float @llvm.maximum.f32(float %a, float %b)
  ret float %1
}

; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.maximum.f32(float, float) #1

attributes #0 = { nounwind }
attributes #1 = { nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none) }

Reproduce:

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

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %2:_(s32) = G_FMAXIMUM %0:_, %1:_ (in function: fmaximum_f32)
warning: Instruction selection used fallback path for fmaximum_f32

Occurrences (56) (first 50):

Input	Function	Config
float-maximum-minimum.ll	fmaximum_f32	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.ll	fmaximum_nnan_f32	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.ll	fmaximum_nnan_op_f32	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.ll	fmaximum_f32	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.ll	fmaximum_nnan_f32	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.ll	fmaximum_nnan_op_f32	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.ll	fmaximum_f32	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -target-abi=ilp32`
float-maximum-minimum.ll	fmaximum_nnan_f32	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -target-abi=ilp32`
float-maximum-minimum.ll	fmaximum_nnan_op_f32	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -target-abi=ilp32`
float-maximum-minimum.ll	fmaximum_f32	`-mtriple=riscv32 -verify-machineinstrs -target-abi=ilp32`
float-maximum-minimum.ll	fmaximum_nnan_f32	`-mtriple=riscv32 -verify-machineinstrs -target-abi=ilp32`
float-maximum-minimum.ll	fmaximum_nnan_op_f32	`-mtriple=riscv32 -verify-machineinstrs -target-abi=ilp32`
float-maximum-minimum.ll	fmaximum_f32	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
float-maximum-minimum.ll	fmaximum_nnan_f32	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
float-maximum-minimum.ll	fmaximum_nnan_op_f32	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
float-maximum-minimum.ll	fmaximum_f32	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -target-abi=lp64f`
float-maximum-minimum.ll	fmaximum_nnan_f32	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -target-abi=lp64f`
float-maximum-minimum.ll	fmaximum_nnan_op_f32	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -target-abi=lp64f`
float-maximum-minimum.ll	fmaximum_f32	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.ll	fmaximum_nnan_f32	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.ll	fmaximum_nnan_op_f32	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.ll	fmaximum_f32	`-mtriple=riscv64 -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.ll	fmaximum_nnan_f32	`-mtriple=riscv64 -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.ll	fmaximum_nnan_op_f32	`-mtriple=riscv64 -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.03fedb3d6d.ll (mutant of float-maximum-minimum.ll)	fmaximum_f32	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.03fedb3d6d.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.0dc958792b.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv64 -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.1722c2c08b.ll (mutant of float-maximum-minimum.ll)	fmaximum_f32	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -target-abi=ilp32`
float-maximum-minimum.1722c2c08b.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -target-abi=ilp32`
float-maximum-minimum.1a594ed914.ll (mutant of float-maximum-minimum.ll)	fmaximum_f32	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.1a594ed914.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.27d8129e2c.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
float-maximum-minimum.33e194b1f3.ll (mutant of float-maximum-minimum.ll)	fmaximum_f32	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
float-maximum-minimum.33e194b1f3.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
float-maximum-minimum.3e94fb1609.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv64 -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.4f87e65be2.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
float-maximum-minimum.541d082eaa.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -target-abi=lp64f`
float-maximum-minimum.6cff201640.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -target-abi=ilp32`
float-maximum-minimum.7c0df012ce.ll (mutant of float-maximum-minimum.ll)	fmaximum_f32	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.7c0df012ce.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.8407a94631.ll (mutant of float-maximum-minimum.ll)	fmaximum_f32	`-mtriple=riscv64 -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.8407a94631.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv64 -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.8bdb60b5f7.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.99d8ef0c17.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.bb1071bc4e.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -target-abi=lp64f`
float-maximum-minimum.bb150a6c64.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32f`
float-maximum-minimum.bdbc6ffaae.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -target-abi=lp64`
float-maximum-minimum.c076a3d917.ll (mutant of float-maximum-minimum.ll)	fmaximum_f32	`-mtriple=riscv32 -verify-machineinstrs -target-abi=ilp32`
float-maximum-minimum.c076a3d917.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv32 -verify-machineinstrs -target-abi=ilp32`
float-maximum-minimum.c24a9fe242.ll (mutant of float-maximum-minimum.ll)	fmaximum_nnan_op_f32	`-mtriple=riscv32 -verify-machineinstrs -target-abi=ilp32`

Generated 2026-10-15 08:05 UTC.