forked from OSchip/llvm-project
31 lines
740 B
LLVM
31 lines
740 B
LLVM
; Test use of RISBG vs RISBGN on zEC12.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=zEC12 | FileCheck %s
|
|
|
|
; On zEC12, we generally prefer RISBGN.
|
|
define i64 @f1(i64 %a, i64 %b) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: risbgn %r2, %r3, 60, 62, 0
|
|
; CHECK: br %r14
|
|
%anda = and i64 %a, -15
|
|
%andb = and i64 %b, 14
|
|
%or = or i64 %anda, %andb
|
|
ret i64 %or
|
|
}
|
|
|
|
; But we may fall back to RISBG if we can use the condition code.
|
|
define i64 @f2(i64 %a, i64 %b, i32* %c) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: risbg %r2, %r3, 60, 62, 0
|
|
; CHECK-NEXT: ipm
|
|
; CHECK: br %r14
|
|
%anda = and i64 %a, -15
|
|
%andb = and i64 %b, 14
|
|
%or = or i64 %anda, %andb
|
|
%cmp = icmp sgt i64 %or, 0
|
|
%conv = zext i1 %cmp to i32
|
|
store i32 %conv, i32* %c, align 4
|
|
ret i64 %or
|
|
}
|
|
|