diff options
| -rw-r--r-- | llvm/test/CodeGen/PowerPC/fsub-fneg.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/PowerPC/fsub-fneg.ll b/llvm/test/CodeGen/PowerPC/fsub-fneg.ll new file mode 100644 index 00000000000..fe0096d66cb --- /dev/null +++ b/llvm/test/CodeGen/PowerPC/fsub-fneg.ll @@ -0,0 +1,21 @@ +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py +; RUN: llc -verify-machineinstrs -mtriple=powerpc64le < %s | FileCheck %s + +; FIXME: When fpext is free, we should look through it for optimizations +; even if it has multiple uses and produce an 'fadd' here. +; Y - (fpext(-X)) --> Y + fpext(X) + +define double @neg_ext_op1_extra_use(float %x, double %y) nounwind { +; CHECK-LABEL: neg_ext_op1_extra_use: +; CHECK: # %bb.0: +; CHECK-NEXT: fneg 0, 1 +; CHECK-NEXT: xssubdp 1, 2, 0 +; CHECK-NEXT: xsdivdp 1, 0, 1 +; CHECK-NEXT: blr + %t1 = fsub float -0.0, %x + %t2 = fpext float %t1 to double + %t3 = fsub double %y, %t2 + %t4 = fdiv double %t2, %t3 + ret double %t4 +} + |
