llvm-6502/test/Analysis/BasicAA/invariant_load.ll
Duncan P. N. Exon Smith 1ef70ff39b IR: Make metadata typeless in assembly
Now that `Metadata` is typeless, reflect that in the assembly.  These
are the matching assembly changes for the metadata/value split in
r223802.

  - Only use the `metadata` type when referencing metadata from a call
    intrinsic -- i.e., only when it's used as a `Value`.

  - Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode`
    when referencing it from call intrinsics.

So, assembly like this:

    define @foo(i32 %v) {
      call void @llvm.foo(metadata !{i32 %v}, metadata !0)
      call void @llvm.foo(metadata !{i32 7}, metadata !0)
      call void @llvm.foo(metadata !1, metadata !0)
      call void @llvm.foo(metadata !3, metadata !0)
      call void @llvm.foo(metadata !{metadata !3}, metadata !0)
      ret void, !bar !2
    }
    !0 = metadata !{metadata !2}
    !1 = metadata !{i32* @global}
    !2 = metadata !{metadata !3}
    !3 = metadata !{}

turns into this:

    define @foo(i32 %v) {
      call void @llvm.foo(metadata i32 %v, metadata !0)
      call void @llvm.foo(metadata i32 7, metadata !0)
      call void @llvm.foo(metadata i32* @global, metadata !0)
      call void @llvm.foo(metadata !3, metadata !0)
      call void @llvm.foo(metadata !{!3}, metadata !0)
      ret void, !bar !2
    }
    !0 = !{!2}
    !1 = !{i32* @global}
    !2 = !{!3}
    !3 = !{}

I wrote an upgrade script that handled almost all of the tests in llvm
and many of the tests in cfe (even handling many `CHECK` lines).  I've
attached it (or will attach it in a moment if you're speedy) to PR21532
to help everyone update their out-of-tree testcases.

This is part of PR21532.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224257 91177308-0d34-0410-b5e6-96231b3b80d8
2014-12-15 19:07:53 +00:00

27 lines
664 B
LLVM

; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
; The input *.ll is obtained by manually annotating "invariant.load" to the
; two loads. With "invariant.load" metadata, the second load is redundant.
;
; int foo(int *p, char *q) {
; *q = (char)*p;
; return *p + 1;
; }
define i32 @foo(i32* nocapture %p, i8* nocapture %q) {
entry:
%0 = load i32* %p, align 4, !invariant.load !3
%conv = trunc i32 %0 to i8
store i8 %conv, i8* %q, align 1
%1 = load i32* %p, align 4, !invariant.load !3
%add = add nsw i32 %1, 1
ret i32 %add
; CHECK: foo
; CHECK: %0 = load i32* %p
; CHECK: store i8 %conv, i8* %q,
; CHECK: %add = add nsw i32 %0, 1
}
!3 = !{}