fallback: legalize: G_FMUL <2 x s32>

Run:	main-04ca53e65f-20261014-113325
Kind:	fallback
Category:	legalize: G_FMUL <2 x s32> NEW
Occurrences:	1 in 1 configs, 1 test files
Snippet from:	calling-conv-vector-float.8f3408b0c8.ll (mutant of calling-conv-vector-float.ll) @callee_v2f32 via llvm-extract
Config:	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs`
Local check:	reproduces at 04ca53e65f
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

@G = external global <2 x float>

define <2 x float> @callee_v2f32(<2 x float> %x, <2 x float> %y) {
  %z = fadd <2 x float> %x, %y
  %C = fcmp uno double 4.940660e-324, 1.000000e+00
  %B = fmul <2 x float> %z, splat (float 4.200000e+01)
  store <2 x float> %B, ptr @G, align 8
  store i1 %C, ptr poison, align 1
  ret <2 x float> %z
}

Reproduce:

llc -mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %12:_(<2 x s32>) = G_FMUL %6:_, %10:_ (in function: callee_v2f32)
warning: Instruction selection used fallback path for callee_v2f32

Occurrences (1):

Input	Function	Config
calling-conv-vector-float.8f3408b0c8.ll (mutant of calling-conv-vector-float.ll)	callee_v2f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs`

Generated 2026-10-15 08:05 UTC.