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[BPF] fix indirect call assembly code

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Currently, for indirect call, the assembly code printed out as
  callx <imm>
This is not right, it should be
  callx <reg>

Fixed the issue with proper format.

Differential Revision: https://reviews.llvm.org/D69229

llvm-svn: 375386
This commit is contained in:
Yonghong Song 2019-10-21 03:22:03 +00:00
parent d3db2c6a77
commit b80df40a5e
2 changed files with 21 additions and 1 deletions
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2
lib/Target/BPF/BPFInstrInfo.td
View File

@ -473,7 +473,7 @@ class CALL<string OpcodeStr>
class CALLX<string OpcodeStr>
: TYPE_ALU_JMP<BPF_CALL.Value, BPF_X.Value,
(outs),
(ins calltarget:$BrDst),
(ins GPR:$BrDst),
!strconcat(OpcodeStr, " $BrDst"),
[]> {
bits<32> BrDst;

20
test/CodeGen/BPF/callx.ll Normal file
View File

@ -0,0 +1,20 @@
; RUN: llc < %s -march=bpfel | FileCheck %s
; source:
; int test(int (*f)(void)) { return f(); }
; Function Attrs: nounwind
define dso_local i32 @test(i32 ()* nocapture %f) local_unnamed_addr #0 {
entry:
%call = tail call i32 %f() #1
; CHECK: callx r{{[0-9]+}}
ret i32 %call
}
attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind }
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 7015a5c54b53d8d2297a3aa38bc32aab167bdcfc)"}