llvm-project/llvm/test/CodeGen/DirectX/firstbitlow_error.ll
Ashley Coleman 4f48abff0f
[HLSL] Implement elementwise firstbitlow builtin (#116858)
Closes https://github.com/llvm/llvm-project/issues/99116

Implements `firstbitlow` by extracting common functionality from
`firstbithigh` into a shared function while also fixing a bug for an edge
case where `u64x3` and larger vectors will attempt to create vectors
larger than the SPRIV max of 4.
---------

Co-authored-by: Steven Perron <stevenperron@google.com>
2025-01-15 15:36:50 -07:00

11 lines
347 B
LLVM

; RUN: not opt -S -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-library %s 2>&1 | FileCheck %s
; DXIL operation firstbitshigh does not support double overload type
; CHECK: invalid intrinsic signature
define noundef double @firstbitlow_double(double noundef %a) {
entry:
%1 = call double @llvm.dx.firstbitlow.f64(double %a)
ret double %1
}