xref: /llvm-project/llvm/test/CodeGen/X86/fp-stack-compare.ll (revision 2f448bf509432c1a19ec46ab8cbc7353c03c6280)
1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2; RUN: llc < %s -mtriple=i686-- -mcpu=i386 | FileCheck %s --check-prefix=BASE
3; RUN: llc < %s -mtriple=i686-- -mcpu=pentiumpro | FileCheck %s --check-prefix=CMOV
4; PR6679
5
6define float @foo(ptr %col) {
7; BASE-LABEL: foo:
8; BASE:       # %bb.0:
9; BASE-NEXT:    movl {{[0-9]+}}(%esp), %eax
10; BASE-NEXT:    flds (%eax)
11; BASE-NEXT:    fld %st(0)
12; BASE-NEXT:    fchs
13; BASE-NEXT:    fucom %st(1)
14; BASE-NEXT:    fnstsw %ax
15; BASE-NEXT:    # kill: def $ah killed $ah killed $ax
16; BASE-NEXT:    sahf
17; BASE-NEXT:    ja .LBB0_2
18; BASE-NEXT:  # %bb.1:
19; BASE-NEXT:    fstp %st(0)
20; BASE-NEXT:    fldz
21; BASE-NEXT:    fxch %st(1)
22; BASE-NEXT:  .LBB0_2:
23; BASE-NEXT:    fstp %st(1)
24; BASE-NEXT:    retl
25;
26; CMOV-LABEL: foo:
27; CMOV:       # %bb.0:
28; CMOV-NEXT:    movl {{[0-9]+}}(%esp), %eax
29; CMOV-NEXT:    flds (%eax)
30; CMOV-NEXT:    fld %st(0)
31; CMOV-NEXT:    fchs
32; CMOV-NEXT:    fucomi %st(1), %st
33; CMOV-NEXT:    fxch %st(1)
34; CMOV-NEXT:    fcmovnbe %st(1), %st
35; CMOV-NEXT:    fstp %st(1)
36; CMOV-NEXT:    retl
37  %t = load float, ptr %col
38  %t16 = fcmp olt float %t, 0.0
39  %t20 = fsub float -0.000000e+00, %t
40  %ift = select i1 %t16, float %t20, float %t
41  ret float %ift
42}
43