test/CodeGen/X86/fp-elim.ll

   1 ; RUN: llc < %s -march=x86 -asm-verbose=false                           | FileCheck %s -check-prefix=FP-ELIM
   2 ; RUN: llc < %s -march=x86 -asm-verbose=false -disable-fp-elim          | FileCheck %s -check-prefix=NO-ELIM
   3 ; RUN: llc < %s -march=x86 -asm-verbose=false -disable-non-leaf-fp-elim | FileCheck %s -check-prefix=NON-LEAF
   4
   5 ; Implement -momit-leaf-frame-pointer
   6 ; rdar://7886181
   7
   8 define i32 @t1() nounwind readnone {
   9 entry:
  10 ; FP-ELIM:      t1:
  11 ; FP-ELIM-NEXT: movl
  12 ; FP-ELIM-NEXT: ret
  13
  14 ; NO-ELIM:      t1:
  15 ; NO-ELIM-NEXT: pushl %ebp
  16 ; NO-ELIM:      popl %ebp
  17 ; NO-ELIM-NEXT: ret
  18
  19 ; NON-LEAF:      t1:
  20 ; NON-LEAF-NEXT: movl
  21 ; NON-LEAF-NEXT: ret
  22   ret i32 10
  23 }
  24
  25 define void @t2() nounwind {
  26 entry:
  27 ; FP-ELIM:     t2:
  28 ; FP-ELIM-NOT: pushl %ebp
  29 ; FP-ELIM:     ret
  30
  31 ; NO-ELIM:      t2:
  32 ; NO-ELIM-NEXT: pushl %ebp
  33 ; NO-ELIM:      popl %ebp
  34 ; NO-ELIM-NEXT: ret
  35
  36 ; NON-LEAF:      t2:
  37 ; NON-LEAF-NEXT: pushl %ebp
  38 ; NON-LEAF:      popl %ebp
  39 ; NON-LEAF-NEXT: ret
  40   tail call void @foo(i32 0) nounwind
  41   ret void
  42 }
  43
  44 declare void @foo(i32)