llvm-6502/test/CodeGen/X86/test-nofold.ll
Dan Gohman b75e8642a6 Add some tests and update an existing test to reflect recent
x86 isel peeps.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92509 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-04 20:53:54 +00:00

43 lines
914 B
LLVM

; RUN: llc < %s -march=x86 -mcpu=yonah | FileCheck %s
; rdar://5752025
; We want:
; CHECK: movl 4(%esp), %ecx
; CHECK-NEXT: andl $15, %ecx
; CHECK-NEXT: movl $42, %eax
; CHECK-NEXT: cmovel %ecx, %eax
; CHECK-NEXT: ret
;
; We don't want:
; movl 4(%esp), %eax
; movl %eax, %ecx # bad: extra copy
; andl $15, %ecx
; testl $15, %eax # bad: peep obstructed
; movl $42, %eax
; cmovel %ecx, %eax
; ret
;
; We also don't want:
; movl $15, %ecx # bad: larger encoding
; andl 4(%esp), %ecx
; movl $42, %eax
; cmovel %ecx, %eax
; ret
;
; We also don't want:
; movl 4(%esp), %ecx
; andl $15, %ecx
; testl %ecx, %ecx # bad: unnecessary test
; movl $42, %eax
; cmovel %ecx, %eax
; ret
define i32 @t1(i32 %X) nounwind {
entry:
%tmp2 = and i32 %X, 15 ; <i32> [#uses=2]
%tmp4 = icmp eq i32 %tmp2, 0 ; <i1> [#uses=1]
%retval = select i1 %tmp4, i32 %tmp2, i32 42 ; <i32> [#uses=1]
ret i32 %retval
}