File: opt-bisect-isel.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (22 lines) | stat: -rw-r--r-- 526 bytes parent folder | download | duplicates (31) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
; This test verifies that no optimizations are performed on the @f function
; when the -opt-bisect-limit=0 option is used.  In particular, the X86
; instruction selector will optimize the cmp instruction to a sub instruction
; if it is not run in -O0 mode.

; RUN: llc -O3 -opt-bisect-limit=0 -o - %s | FileCheck %s

target triple = "x86_64-unknown-linux-gnu"

define void @f() {
entry:
  %cmp = icmp slt i32 undef, 8
  br i1 %cmp, label %middle, label %end

middle:
  br label %end

end:
  ret void
}

; CHECK: cmpl $8, %eax