File: hoist_instr.ll

package info (click to toggle)
llvm-3.1 3.1-1
  • links: PTS, VCS
  • area: main
  • in suites: wheezy
  • size: 80,224 kB
  • sloc: cpp: 491,014; asm: 110,971; ansic: 14,579; sh: 13,120; python: 6,152; ml: 4,719; makefile: 1,830; pascal: 1,553; perl: 874; xml: 283; lisp: 187; csh: 117; exp: 4
file content (18 lines) | stat: -rw-r--r-- 498 bytes parent folder | download | duplicates (27)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
; RUN: opt < %s -instcombine -S | FileCheck %s

;; This tests that the div is hoisted into the then block.
define i32 @foo(i1 %C, i32 %A, i32 %B) {
entry:
        br i1 %C, label %then, label %endif

then:           ; preds = %entry
; CHECK: then:
; CHECK-NEXT: sdiv i32
        br label %endif

endif:          ; preds = %then, %entry
        %X = phi i32 [ %A, %then ], [ 15, %entry ]              ; <i32> [#uses=1]
        %Y = sdiv i32 %X, 42            ; <i32> [#uses=1]
        ret i32 %Y
}