For example https://www.shadertoy.com/view/MddGzf LLVM somewhere optimizes it
into exp10f:

56126: message: shader compiler issue 2: LLVM diagnostic (error):
<unknown>:0:0: in function main <{ i32, i32, i32, i32, i32, i32, i32, i32, i32,
i32, i32, float, float, float, float, float, float, float, float, float, float,
float, float, float, float }> ([17 x <16 x i8>] addrspace(2)*, [16 x <16 x i8>]
addrspace(2)*, [32 x <8 x i32>] addrspace(2)*, [16 x <8 x i32>] addrspace(2)*,
[16 x <4 x i32>] addrspace(2)*, float, i32, <2 x i32>, <2 x i32>, <2 x i32>, <3
x i32>, <2 x i32>, <2 x i32>, <2 x i32>, float, float, float, float, float,
i32, i32, float, i32): unsupported call to function exp10f
LLVM triggered Diagnostic Handler: <unknown>:0:0: in function main <{ i32, i32,
i32, i32, i32, i32, i32, i32, i32, i32, i32, float, float, float, float, float,
float, float, float, float, float, float, float, float, float }> ([17 x <16 x
i8>] addrspace(2)*, [16 x <16 x i8>] addrspace(2)*, [32 x <8 x i32>]
addrspace(2)*, [16 x <8 x i32>] addrspace(2)*, [16 x <4 x i32>] addrspace(2)*,
float, i32, <2 x i32>, <2 x i32>, <2 x i32>, <3 x i32>, <2 x i32>, <2 x i32>,
<2 x i32>, float, float, float, float, float, i32, i32, float, i32):
unsupported call to function exp10f

56126: message: shader compiler issue 3: LLVM compile failed
LLVM failed to compile shader
radeonsi: can't create a shader