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
   4 ; Implement -momit-leaf-frame-pointer
   5 ; rdar://7886181
   6
   7 define i32 @t1() nounwind readnone {
   8 entry:
   9 ; FP-ELIM-LABEL:  t1:
  10 ; FP-ELIM-NEXT:     movl
  11 ; FP-ELIM-NEXT:     ret
  12
  13 ; NO-ELIM-LABEL:  t1:
  14 ; NO-ELIM-NEXT:     pushl %ebp
  15 ; NO-ELIM:          popl %ebp
  16 ; NO-ELIM-NEXT:     ret
  17   ret i32 10
  18 }
  19
  20 define void @t2() nounwind {
  21 entry:
  22 ; FP-ELIM-LABEL:  t2:
  23 ; FP-ELIM-NOT:      pushl %ebp
  24 ; FP-ELIM:          ret
  25
  26 ; NO-ELIM-LABEL:  t2:
  27 ; NO-ELIM-NEXT:     pushl %ebp
  28 ; NO-ELIM:          popl %ebp
  29 ; NO-ELIM-NEXT:     ret
  30   tail call void @foo(i32 0) nounwind
  31   ret void
  32 }
  33
  34 define i32 @t3() "no-frame-pointer-elim-non-leaf" nounwind readnone {
  35 entry:
  36 ; FP-ELIM-LABEL:  t3:
  37 ; FP-ELIM-NEXT:     movl
  38 ; FP-ELIM-NEXT:     ret
  39
  40 ; NO-ELIM-LABEL:  t3:
  41 ; NO-ELIM-NEXT:     pushl %ebp
  42 ; NO-ELIM:          popl %ebp
  43 ; NO-ELIM-NEXT:     ret
  44   ret i32 10
  45 }
  46
  47 define void @t4() "no-frame-pointer-elim-non-leaf" nounwind {
  48 entry:
  49 ; FP-ELIM-LABEL:  t4:
  50 ; FP-ELIM-NEXT:     pushl %ebp
  51 ; FP-ELIM:          popl %ebp
  52 ; FP-ELIM-NEXT:     ret
  53
  54 ; NO-ELIM-LABEL:  t4:
  55 ; NO-ELIM-NEXT:     pushl %ebp
  56 ; NO-ELIM:          popl %ebp
  57 ; NO-ELIM-NEXT:     ret
  58   tail call void @foo(i32 0) nounwind
  59   ret void
  60 }
  61
  62 declare void @foo(i32)