https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97142
--- Comment #10 from luoxhu at gcc dot gnu.org ---
If not built with fast-math, gimple_has_side_effects will return true and cause
the expand_call_stmt fail to expand the "_1 = fmod (x_2(D), y_3(D));" to
internal function. X86 also produces "bl fmod" for O3 build.
xlF expands the fmod to below ASM, no FMA generated?
0000000010000900 <ggl>:
10000900: 8c 03 01 10 vspltisw v0,1
10000904: 00 00 24 c8 lfd f1,0(r4)
10000908: 00 00 03 c8 lfd f0,0(r3)
1000090c: e2 03 40 f0 xvcvsxwdp vs2,vs32
10000910: c0 09 62 f0 xsdivdp vs3,vs2,vs1
10000914: 80 19 80 f0 xsmuldp vs4,vs0,vs3
10000918: 64 21 a0 f0 xsrdpiz vs5,vs4
1000091c: 88 2d 01 f0 xsnmsubadp vs0,vs1,vs5
10000920: 18 00 20 fc frsp f1,f0
10000924: 20 00 80 4e blr
