Imported Upstream version 5.18.0.179

Former-commit-id: 67aa10e65b237e1c4537630979ee99ebe1374215
This commit is contained in:
Xamarin Public Jenkins (auto-signing)
2018-10-25 08:34:57 +00:00
parent d6bde52373
commit 8625704ad8
28485 changed files with 3866843 additions and 50 deletions

View File

@@ -0,0 +1,22 @@
; Test that the backend does not mess up the I/R in case of a use of an undef
; register. This typically happens while expanding a pseudo or otherwise
; replacing an instruction for another.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 -verify-machineinstrs | FileCheck %s
; LLCRMux
define void @f1(i8*) {
; CHECK-LABEL: f1:
; CHECK-NOT: *** Bad machine code: Using an undefined physical register ***
BB:
%L5 = load i8, i8* %0
%B9 = lshr i8 %L5, -1
br label %CF
CF: ; preds = %CF, %BB
%Cmp25 = icmp ne i8 27, %B9
br i1 %Cmp25, label %CF, label %CF34
CF34: ; preds = %CF
ret void
}