mirror of
https://github.com/RPCS3/llvm.git
synced 2025-01-03 02:08:54 +00:00
3e054fe9ef
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81257 91177308-0d34-0410-b5e6-96231b3b80d8
23 lines
634 B
LLVM
23 lines
634 B
LLVM
; RUN: opt %s -instcombine -S | grep { i32 \[%\]sd, \[\[:alnum:\]\]* \\?1\\>} | count 4
|
|
|
|
; Instcombine normally would fold the sdiv into the comparison,
|
|
; making "icmp slt i32 %h, 2", but in this case the sdiv has
|
|
; another use, so it wouldn't a big win, and it would also
|
|
; obfuscate an otherise obvious smax pattern to the point where
|
|
; other analyses wouldn't recognize it.
|
|
|
|
define i32 @foo(i32 %h) {
|
|
%sd = sdiv i32 %h, 2
|
|
%t = icmp slt i32 %sd, 1
|
|
%r = select i1 %t, i32 %sd, i32 1
|
|
ret i32 %r
|
|
}
|
|
|
|
define i32 @bar(i32 %h) {
|
|
%sd = sdiv i32 %h, 2
|
|
%t = icmp sgt i32 %sd, 1
|
|
%r = select i1 %t, i32 %sd, i32 1
|
|
ret i32 %r
|
|
}
|
|
|