forked from OSchip/llvm-project
47 lines
950 B
LLVM
47 lines
950 B
LLVM
; Test SystemZInstrInfo::AnalyzeBranch and SystemZInstrInfo::InsertBranch.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
declare void @foo() noreturn
|
|
|
|
; Check a case where a separate branch is needed and where the original
|
|
; order should be reversed.
|
|
define i32 @f1(i32 %a, i32 *%bptr) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: cl %r2, 0(%r3)
|
|
; CHECK: jl .L[[LABEL:.*]]
|
|
; CHECK: br %r14
|
|
; CHECK: .L[[LABEL]]:
|
|
; CHECK: brasl %r14, foo@PLT
|
|
entry:
|
|
%b = load i32 , i32 *%bptr
|
|
%cmp = icmp ult i32 %a, %b
|
|
br i1 %cmp, label %callit, label %return
|
|
|
|
callit:
|
|
call void @foo()
|
|
unreachable
|
|
|
|
return:
|
|
ret i32 1
|
|
}
|
|
|
|
; Same again with a fused compare and branch.
|
|
define i32 @f2(i32 %a) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: cije %r2, 0, .L[[LABEL:.*]]
|
|
; CHECK: br %r14
|
|
; CHECK: .L[[LABEL]]:
|
|
; CHECK: brasl %r14, foo@PLT
|
|
entry:
|
|
%cmp = icmp eq i32 %a, 0
|
|
br i1 %cmp, label %callit, label %return
|
|
|
|
callit:
|
|
call void @foo()
|
|
unreachable
|
|
|
|
return:
|
|
ret i32 1
|
|
}
|