File: 2003-04-22-GEPProblem.ll

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.6-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,304 kB
  • sloc: cpp: 7,438,677; ansic: 1,393,822; asm: 1,012,926; python: 241,650; f90: 86,635; objc: 75,479; lisp: 42,144; pascal: 17,286; sh: 10,027; ml: 5,082; perl: 4,730; awk: 3,523; makefile: 3,349; javascript: 2,251; xml: 892; fortran: 672
file content (14 lines) | stat: -rw-r--r-- 409 bytes parent folder | download | duplicates (14) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
 
; RUN: opt < %s -aa-pipeline=basic-aa -passes=gvn,instcombine -S | FileCheck %s

; BasicAA was incorrectly concluding that P1 and P2 didn't conflict!

define i32 @test(ptr %Ptr, i64 %V) {
; CHECK: sub i32 %X, %Y
  %P2 = getelementptr i32, ptr %Ptr, i64 1
  %P1 = getelementptr i32, ptr %Ptr, i64 %V
  %X = load i32, ptr %P1
  store i32 5, ptr %P2
  %Y = load i32, ptr %P1
  %Z = sub i32 %X, %Y
  ret i32 %Z
}