[PowerPC] fatal error: error in backend: Cannot select: t35: v4f32 = froundeven t34

[pkubaj]

LLVM 20.0.d20241215
FreeBSD 14.2-RELEASE
powerpc64, powerpc64le

Reproducer:

float f32 __attribute__((__vector_size__(16)));
void simde_m128_from_private(float f32 __attribute__((__vector_size__(16))));
void simde_x_mm_round_ps() {
  f32[2] = __builtin_roundevenf(f32[2]);
  f32[3] = __builtin_roundevenf(f32[3]);
  simde_m128_from_private(f32);
}

Compile with:

clang++-devel -cc1 -triple powerpc64le-unknown-freebsd14.2 -emit-obj -target-cpu ppc64le -O2 -vectorize-slp FGA_sse41-af262d.cpp

[llvmbot]

@llvm/issue-subscribers-backend-powerpc

Author: Piotr Kubaj (pkubaj)

LLVM 20.0.d20241215 FreeBSD 14.2-RELEASE powerpc64, powerpc64le

Reproducer:

typedef struct {
  float f32 __attribute__((__vector_size__(16)));
} simde_m128_private;
void simde_m128_from_private(simde_m128_private);
simde_m128_private simde_x_mm_round_ps_a_;
void simde_x_mm_round_ps() {
  simde_m128_private r_;
  r_.f32[2] = __builtin_roundevenf(simde_x_mm_round_ps_a_.f32[2]);
  r_.f32[3] = __builtin_roundevenf(simde_x_mm_round_ps_a_.f32[3]);
  simde_m128_from_private(r_);
}

Compile with:

clang++-devel -cc1 -triple powerpc64le-unknown-freebsd14.2 -emit-obj -target-cpu ppc64le -O2 -vectorize-slp FGA_sse41-af262d.cpp