File: opt-bisect-isel.ll

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (22 lines) | stat: -rw-r--r-- 526 bytes parent folder | download | duplicates (30) 
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