129 lines
2.9 KiB
LLVM
129 lines
2.9 KiB
LLVM
|
; Test LOCR and LOCGR.
|
||
|
|
;
|
||
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 -verify-machineinstrs | FileCheck %s
|
||
|
|
;
|
||
|
|
; Run the test again to make sure it still works the same even
|
||
|
|
; in the presence of the load-store-on-condition-2 facility.
|
||
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 -verify-machineinstrs | FileCheck %s
|
||
|
|
;
|
||
|
|
; And again in the presence of the select instructions.
|
||
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z15 -verify-machineinstrs | FileCheck %s
|
||
|
|
|
||
|
|
; Test LOCR.
|
||
|
|
define i32 @f1(i32 %a, i32 %b, i32 %limit) {
|
||
|
|
; CHECK-LABEL: f1:
|
||
|
|
; CHECK: clfi %r4, 42
|
||
|
|
; CHECK: locrhe %r2, %r3
|
||
|
|
; CHECK: br %r14
|
||
|
|
%cond = icmp ult i32 %limit, 42
|
||
|
|
%res = select i1 %cond, i32 %a, i32 %b
|
||
|
|
ret i32 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
; Test LOCGR.
|
||
|
|
define i64 @f2(i64 %a, i64 %b, i64 %limit) {
|
||
|
|
; CHECK-LABEL: f2:
|
||
|
|
; CHECK: clgfi %r4, 42
|
||
|
|
; CHECK: locgrhe %r2, %r3
|
||
|
|
; CHECK: br %r14
|
||
|
|
%cond = icmp ult i64 %limit, 42
|
||
|
|
%res = select i1 %cond, i64 %a, i64 %b
|
||
|
|
ret i64 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
; Test LOCR in a case that could use COMPARE AND BRANCH. We prefer using
|
||
|
|
; LOCR if possible.
|
||
|
|
define i32 @f3(i32 %a, i32 %b, i32 %limit) {
|
||
|
|
; CHECK-LABEL: f3:
|
||
|
|
; CHECK: chi %r4, 42
|
||
|
|
; CHECK: locrlh %r2, %r3
|
||
|
|
; CHECK: br %r14
|
||
|
|
%cond = icmp eq i32 %limit, 42
|
||
|
|
%res = select i1 %cond, i32 %a, i32 %b
|
||
|
|
ret i32 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
; ...and again for LOCGR.
|
||
|
|
define i64 @f4(i64 %a, i64 %b, i64 %limit) {
|
||
|
|
; CHECK-LABEL: f4:
|
||
|
|
; CHECK: cghi %r4, 42
|
||
|
|
; CHECK: locgrlh %r2, %r3
|
||
|
|
; CHECK: br %r14
|
||
|
|
%cond = icmp eq i64 %limit, 42
|
||
|
|
%res = select i1 %cond, i64 %a, i64 %b
|
||
|
|
ret i64 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
; Check that we also get LOCR as a result of early if-conversion.
|
||
|
|
define i32 @f5(i32 %a, i32 %b, i32 %limit) {
|
||
|
|
; CHECK-LABEL: f5:
|
||
|
|
; CHECK: clfi %r4, 41
|
||
|
|
; CHECK: locrh %r2, %r3
|
||
|
|
; CHECK: br %r14
|
||
|
|
entry:
|
||
|
|
%cond = icmp ult i32 %limit, 42
|
||
|
|
br i1 %cond, label %if.then, label %return
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
br label %return
|
||
|
|
|
||
|
|
return:
|
||
|
|
%res = phi i32 [ %a, %if.then ], [ %b, %entry ]
|
||
|
|
ret i32 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
; ... and likewise for LOCGR.
|
||
|
|
define i64 @f6(i64 %a, i64 %b, i64 %limit) {
|
||
|
|
; CHECK-LABEL: f6:
|
||
|
|
; CHECK: clgfi %r4, 41
|
||
|
|
; CHECK: locgrh %r2, %r3
|
||
|
|
; CHECK: br %r14
|
||
|
|
entry:
|
||
|
|
%cond = icmp ult i64 %limit, 42
|
||
|
|
br i1 %cond, label %if.then, label %return
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
br label %return
|
||
|
|
|
||
|
|
return:
|
||
|
|
%res = phi i64 [ %a, %if.then ], [ %b, %entry ]
|
||
|
|
ret i64 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
; Check that inverting the condition works as well.
|
||
|
|
define i32 @f7(i32 %a, i32 %b, i32 %limit) {
|
||
|
|
; CHECK-LABEL: f7:
|
||
|
|
; CHECK: clfi %r4, 41
|
||
|
|
; CHECK: locrle %r2, %r3
|
||
|
|
; CHECK: br %r14
|
||
|
|
entry:
|
||
|
|
%cond = icmp ult i32 %limit, 42
|
||
|
|
br i1 %cond, label %if.then, label %return
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
br label %return
|
||
|
|
|
||
|
|
return:
|
||
|
|
%res = phi i32 [ %b, %if.then ], [ %a, %entry ]
|
||
|
|
ret i32 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
; ... and likewise for LOCGR.
|
||
|
|
define i64 @f8(i64 %a, i64 %b, i64 %limit) {
|
||
|
|
; CHECK-LABEL: f8:
|
||
|
|
; CHECK: clgfi %r4, 41
|
||
|
|
; CHECK: locgrle %r2, %r3
|
||
|
|
; CHECK: br %r14
|
||
|
|
entry:
|
||
|
|
%cond = icmp ult i64 %limit, 42
|
||
|
|
br i1 %cond, label %if.then, label %return
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
br label %return
|
||
|
|
|
||
|
|
return:
|
||
|
|
%res = phi i64 [ %b, %if.then ], [ %a, %entry ]
|
||
|
|
ret i64 %res
|
||
|
|
}
|
||
|
|
|