fallback: unable to translate constant

Run:main-04ca53e65f-20261014-113325
Kind:fallback
Category:unable to translate constant
Occurrences:8 in 2 configs, 1 test files
Snippet from:vector-tuple-zeroinitializer.ll @test_tuple_zero_power_of_2 via llvm-extract
Config:-mtriple=riscv32 -mattr=+v -verify-machineinstrs
Local check:reproduces at 04ca53e65f
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

define target("riscv.vector.tuple", <vscale x 16 x i8>, 2) @test_tuple_zero_power_of_2() {
entry:
  ret target("riscv.vector.tuple", <vscale x 16 x i8>, 2) zeroinitializer
}

Reproduce:

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

Local llc output:

remark: <unknown>:0:0: unable to translate constant: target("riscv.vector.tuple", <vscale x 16 x i8>, 2) (in function: test_tuple_zero_power_of_2)
remark: <unknown>:0:0: unable to translate instruction: ret: '  ret target("riscv.vector.tuple", <vscale x 16 x i8>, 2) zeroinitializer' (in function: test_tuple_zero_power_of_2)
warning: Instruction selection used fallback path for test_tuple_zero_power_of_2

Occurrences (8):

InputFunctionConfig
vector-tuple-zeroinitializer.lltest_tuple_zero_power_of_2-mtriple=riscv32 -mattr=+v -verify-machineinstrs
vector-tuple-zeroinitializer.lltest_tuple_zero_non_power_of_2-mtriple=riscv32 -mattr=+v -verify-machineinstrs
vector-tuple-zeroinitializer.lltest_tuple_zero_power_of_2-mtriple=riscv64 -mattr=+v -verify-machineinstrs
vector-tuple-zeroinitializer.lltest_tuple_zero_non_power_of_2-mtriple=riscv64 -mattr=+v -verify-machineinstrs
vector-tuple-zeroinitializer.25ac08bb45.ll (mutant of vector-tuple-zeroinitializer.ll)test_tuple_zero_power_of_2-mtriple=riscv64 -mattr=+v -verify-machineinstrs
vector-tuple-zeroinitializer.25ac08bb45.ll (mutant of vector-tuple-zeroinitializer.ll)test_tuple_zero_non_power_of_2-mtriple=riscv64 -mattr=+v -verify-machineinstrs
vector-tuple-zeroinitializer.f4e421a226.ll (mutant of vector-tuple-zeroinitializer.ll)test_tuple_zero_power_of_2-mtriple=riscv32 -mattr=+v -verify-machineinstrs
vector-tuple-zeroinitializer.f4e421a226.ll (mutant of vector-tuple-zeroinitializer.ll)test_tuple_zero_non_power_of_2-mtriple=riscv32 -mattr=+v -verify-machineinstrs

Generated 2026-10-15 08:05 UTC.