diff options
Diffstat (limited to 'test/CodeGen/ARM64/fixed-point-scalar-cvt-dagcombine.ll')
| -rw-r--r-- | test/CodeGen/ARM64/fixed-point-scalar-cvt-dagcombine.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/test/CodeGen/ARM64/fixed-point-scalar-cvt-dagcombine.ll b/test/CodeGen/ARM64/fixed-point-scalar-cvt-dagcombine.ll new file mode 100644 index 0000000..77981f2 --- /dev/null +++ b/test/CodeGen/ARM64/fixed-point-scalar-cvt-dagcombine.ll @@ -0,0 +1,15 @@ +; RUN: llc < %s -march=arm64 -arm64-neon-syntax=apple | FileCheck %s + +; DAGCombine to transform a conversion of an extract_vector_elt to an +; extract_vector_elt of a conversion, which saves a round trip of copies +; of the value to a GPR and back to and FPR. +; rdar://11855286 +define double @foo0(<2 x i64> %a) nounwind { +; CHECK: scvtf.2d [[REG:v[0-9]+]], v0, #9 +; CHECK-NEXT: ins.d v0[0], [[REG]][1] + %vecext = extractelement <2 x i64> %a, i32 1 + %fcvt_n = tail call double @llvm.arm64.neon.vcvtfxs2fp.f64.i64(i64 %vecext, i32 9) + ret double %fcvt_n +} + +declare double @llvm.arm64.neon.vcvtfxs2fp.f64.i64(i64, i32) nounwind readnone |