File: early_constfold_changes_IR.ll

package info (click to toggle)
llvm-toolchain-5.0 1:5.0.1-2~bpo9+1
  • links: PTS, VCS
  • area: main
  • in suites: stretch-backports
  • size: 553,688 kB
  • sloc: cpp: 2,878,786; ansic: 584,110; asm: 246,252; python: 124,751; objc: 106,925; sh: 21,542; lisp: 8,628; pascal: 5,885; ml: 5,544; perl: 5,312; makefile: 2,208; cs: 2,022; xml: 686; php: 212; csh: 117
file content (20 lines) | stat: -rw-r--r-- 652 bytes parent folder | download | duplicates (17)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
; This run line verifies that we get the expected constant fold.
; RUN: opt < %s -instcombine -S | FileCheck %s

; This run line verifies that InstructionCombiningPass::runOnFunction reports
; this as a modification of the IR.
; RUN: opt < %s -instcombine -disable-output -debug-pass=Details 2>&1 | FileCheck %s --check-prefix=DETAILS

define i32 @foo(i32 %arg) #0 {
; CHECK-LABEL: @foo(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[AND:%.*]] = and i32 [[ARG:%.*]], 7
; CHECK-NEXT:    ret i32 [[AND]]
;
entry:
  %or = or i32 0, 7
  %and = and i32 %arg, %or
  ret i32 %and
}

; DETAILS:  Made Modification 'Combine redundant instructions' on Function 'foo'