fallback: legalize: G_MUL <4 x s32>
| Run: | explore-bc8218b282-20261015-075519 |
| Kind: | fallback |
| Category: | legalize: G_MUL <4 x s32> NEW |
| Occurrences: | 9 in 8 configs, 2 test files |
| Snippet from: | fold-binop-into-select.2827176469.ll (mutant of fold-binop-into-select.ll) @fold_binop_into_select_1 via llvm-extract |
| Config: | -mtriple=riscv64 |
| Local check: | reproduces at bc8218b282 |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
Snippet:
@G = external global <4 x i32>
@G.1 = external global <4 x i32>
define i64 @fold_binop_into_select_1(i1 %c, i64 %x) {
entry:
%LGV1 = load <4 x i32>, ptr @G.1, align 16
%LGV = load <4 x i32>, ptr @G, align 16
%select_ = select i1 %c, i64 2, i64 %x
%res = sub i64 %select_, 2
%B = mul <4 x i32> %LGV, %LGV1
store <4 x i32> %B, ptr poison, align 16
ret i64 %res
}
Reproduce:
llc -mtriple=riscv64 -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to legalize instruction: %10:_(<4 x s32>) = G_MUL %5:_, %3:_ (in function: fold_binop_into_select_1)
warning: Instruction selection used fallback path for fold_binop_into_select_1
Occurrences (9):
| Input | Function | Config |
|---|
| fold-binop-into-select.2827176469.ll (mutant of fold-binop-into-select.ll) | fold_binop_into_select_1 | -mtriple=riscv64 |
| frame-info.2c0b53030c.ll (mutant of frame-info.ll) | stack_alloc | -mtriple=riscv32 |
| frame-info.380691b9ca.ll (mutant of frame-info.ll) | stack_alloc | -mtriple=riscv64 -frame-pointer=all --enable-shrink-wrap=false -verify-machineinstrs |
| frame-info.3ec7ba0509.ll (mutant of frame-info.ll) | stack_alloc | -mtriple=riscv32 -frame-pointer=all --enable-shrink-wrap=false -verify-machineinstrs |
| frame-info.712eb10bde.ll (mutant of frame-info.ll) | stack_alloc | -mtriple=riscv32 --enable-shrink-wrap=false |
| frame-info.7b39543de1.ll (mutant of frame-info.ll) | stack_alloc | -mtriple=riscv32 -frame-pointer=all -verify-machineinstrs |
| frame-info.b131a0cbfe.ll (mutant of frame-info.ll) | stack_alloc | -mtriple=riscv64 |
| frame-info.ca2be894b0.ll (mutant of frame-info.ll) | stack_alloc | -mtriple=riscv64 -frame-pointer=all -verify-machineinstrs |
| frame-info.d6787a31dd.ll (mutant of frame-info.ll) | stack_alloc | -mtriple=riscv64 --enable-shrink-wrap=false |
Generated 2026-10-15 08:05 UTC.