Commit 5a661d61 authored by Hans Wennborg's avatar Hans Wennborg
Browse files

Merging r370753: 

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r370753 | jonpa | 2019-09-03 15:31:22 +0200 (Tue, 03 Sep 2019) | 6 lines

[SystemZ]  Recognize INLINEASM_BR in backend.

SystemZInstrInfo::analyzeBranch() needs to check for INLINEASM_BR
instructions, or it will crash.

Review: Ulrich Weigand
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llvm-svn: 371043
parent 1b8425cf

llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp

+2 −2
Original line number Diff line number Diff line
@@ -462,8 +462,8 @@ bool SystemZInstrInfo::analyzeBranch(MachineBasicBlock &MBB, 
      break;



    // A terminator that isn't a branch can't easily be handled by this

    // analysis.

    if (!I->isBranch())

    // analysis.  Asm goto is not understood / optimized.

    if (!I->isBranch() || I->getOpcode() == SystemZ::INLINEASM_BR)

      return true;



    // Can't handle indirect branches.

llvm/test/CodeGen/SystemZ/asm-20.ll

0 → 100644
+15 −0
Original line number Diff line number Diff line 
; Test that asm goto can be compiled.

;

; RUN: llc < %s -mtriple=s390x-linux-gnu



define i32 @c() {

entry:

  callbr void asm sideeffect "", "X"(i8* blockaddress(@c, %d))

          to label %asm.fallthrough [label %d]



asm.fallthrough:               ; preds = %entry

  br label %d



d:                             ; preds = %asm.fallthrough, %entry

  ret i32 undef

}