llvm-mirror/upgrade-void-ret-attr-11.0.ll at d88c54090145e5173a7bb6361ed83d602827a15d - llvm-mirror - Git.je (Gitea)

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Steven Wu 5c8193b398 [IR][AutoUpgrade] Drop align attribute from void return types

Since D87304, `align` become an invalid attribute on none pointer types and
verifier will reject bitcode that has invalid `align` attribute.

The problem is before the change, DeadArgumentElimination can easily
turn a pointer return type into a void return type without removing
`align` attribute. Teach Autograde to remove invalid `align` attribute
from return types to maintain bitcode compatibility.

rdar://77022993

Reviewed By: dexonsmith

Differential Revision: https://reviews.llvm.org/D102201

2021-05-11 08:23:55 -07:00

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 ; Check upgrade is removing the incompatible attributes on void return type.
 ; RUN: llvm-dis < %s.bc | FileCheck %s
 ; CHECK: define void @f()
 define align 8 void @f() {
   ret void
 }
 define void @g() {
 ; CHECK: call void @f()
   call align 8 void @f();
   ret void
 }