Trevor Gross c63d2953a0
[SelectionDAG,GISel] Add f16 soft promotion for lrint, lround, llrint, and llround (#152684)
On platforms that soft promote `half`, using `lrint` intrinsics crashes
with the following:

    SoftPromoteHalfOperand Op #0: t5: i32 = lrint t4

    LLVM ERROR: Do not know how to soft promote this operator's operand!
PLEASE submit a bug report to
https://github.com/llvm/llvm-project/issues/ and include the crash
backtrace.
    Stack dump:
0. Program arguments:
/Users/tmgross/Documents/projects/llvm/llvm-build/bin/llc
-mtriple=riscv32
    1.      Running pass 'Function Pass Manager' on module '<stdin>'.
2. Running pass 'RISC-V DAG->DAG Pattern Instruction Selection' on
function '@test_lrint_ixx_f16'

Resolve this by adding a soft promotion. GISel is included since tests
cover both.

Fixes crash tests added in
https://github.com/llvm/llvm-project/pull/152662 for targets that use
`softPromoteHalfType`.

Co-authored-by: Folkert de Vries <folkert@folkertdev.nl>
2026-01-08 12:40:10 +01:00
..
2025-07-07 18:31:13 +01:00
2025-03-30 16:38:16 -07:00
2025-03-30 16:38:16 -07:00