File: peep-test-2.ll

package info (click to toggle)
llvm-toolchain-6.0 1%3A6.0.1-10
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 598,080 kB
  • sloc: cpp: 3,046,253; ansic: 595,057; asm: 271,965; python: 128,926; objc: 106,554; sh: 21,906; lisp: 10,191; pascal: 6,094; ml: 5,544; perl: 5,265; makefile: 2,227; cs: 2,027; xml: 686; php: 212; csh: 117
file content (19 lines) | stat: -rw-r--r-- 686 bytes parent folder | download | duplicates (13)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
; RUN: llc < %s -verify-machineinstrs | FileCheck %s

; CHECK: testl

; It's tempting to eliminate the testl instruction here and just use the
; EFLAGS value from the incl, however it can't be known whether the add
; will overflow, and if it does the incl would set OF, and the
; subsequent setg would return true.

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin9.6"

define i32 @f(i32 %j) nounwind readnone {
entry:
	%0 = add i32 %j, 1		; <i32> [#uses=1]
	%1 = icmp sgt i32 %0, 0		; <i1> [#uses=1]
	%2 = zext i1 %1 to i32		; <i32> [#uses=1]
	ret i32 %2
}