llvm/test/Transforms/SimplifyCFG/preserve-branchweights-partial.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

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LLVM

; RUN: opt -simplifycfg -S -o - < %s | FileCheck %s
; This test case was written to trigger an incorrect assert statement in
; -simplifycfg. Thus we don't actually want to check the output, just that
; -simplifycfg ran successfully. Thus we only check that the function still
; exists, and that it still calls foo().
;
; NOTE: There are some obviously dead blocks and missing branch weight
; metadata. Both of these features were key to triggering the assert.
; Additionally, the not-taken weight of the branch with a weight had to
; be 0 to trigger the assert.
declare void @foo() nounwind uwtable
define void @func(i32 %A) nounwind uwtable {
; CHECK-LABEL: define void @func(
entry:
%cmp11 = icmp eq i32 %A, 1
br i1 %cmp11, label %if.then, label %if.else, !prof !0
if.then:
call void @foo()
; CHECK: call void @foo()
br label %if.else
if.else:
%cmp17 = icmp eq i32 %A, 2
br i1 %cmp17, label %if.then2, label %if.end
if.then2:
br label %if.end
if.end:
ret void
}
!0 = !{!"branch_weights", i32 1, i32 0}