[llvm-bugs] [Bug 41627] New: SDAG tries to legalize token and aborts

via llvm-bugs llvm-bugs at lists.llvm.org
Sat Apr 27 12:11:43 PDT 2019


            Bug ID: 41627
           Summary: SDAG tries to legalize token and aborts
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: compnerd at compnerd.org
                CC: llvm-bugs at lists.llvm.org

When building some code with the experimental pass manager involving
coroutines, the id/alloc intrinsics were inlined into a function.  CodeGen then
tried to legalize the body which aborts on the `token` type.

Reduced test case:

; RUN: %llc -mtriple x86_64-unknown-linux-gnu -filetype asm -o - %s |
%FileCheck s

declare token @llvm.coro.id(i32, i8* readnone, i8* nocapture readonly, i8*)
declare i1 @llvm.coro.alloc(token)

define i1 @f(i8* %0) {
  %1 = call token @llvm.coro.id(i32 16, i8* %0, i8* null, i8* null)
  %2 = call i1 @llvm.coro.alloc(token %1)
  ret i1 %2

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