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; 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
}
|
