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; Test SELFHR.
; See comments in asm-18.ll about testing high-word operations.
;
; RUN: llc < %s -verify-machineinstrs -mtriple=s390x-linux-gnu -mcpu=z15 \
; RUN: -no-integrated-as | FileCheck %s
define void @f1(i32 %limit) {
; CHECK-LABEL: f1:
; CHECK-DAG: stepa [[REG1:%r[0-5]]]
; CHECK-DAG: stepb [[REG2:%r[0-5]]]
; CHECK-DAG: clfi %r2, 42
; CHECK: selfhrl [[REG3:%r[0-5]]], [[REG1]], [[REG2]]
; CHECK: stepc [[REG3]]
; CHECK: br %r14
%a = call i32 asm sideeffect "stepa $0", "=h"()
%b = call i32 asm sideeffect "stepb $0", "=h"()
%cond = icmp ult i32 %limit, 42
%res = select i1 %cond, i32 %a, i32 %b
call void asm sideeffect "stepc $0", "h"(i32 %res)
call void asm sideeffect "use $0", "h"(i32 %a)
call void asm sideeffect "use $0", "h"(i32 %b)
ret void
}
; Check that we also get SELFHR as a result of early if-conversion.
define void @f2(i32 %limit) {
; CHECK-LABEL: f2:
; CHECK-DAG: stepa [[REG1:%r[0-5]]]
; CHECK-DAG: stepb [[REG2:%r[0-5]]]
; CHECK-DAG: clfi %r2, 41
; CHECK: selfhrh [[REG3:%r[0-5]]], [[REG2]], [[REG1]]
; CHECK: stepc [[REG3]]
; CHECK: br %r14
entry:
%a = call i32 asm sideeffect "stepa $0", "=h"()
%b = call i32 asm sideeffect "stepb $0", "=h"()
%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 ]
call void asm sideeffect "stepc $0", "h"(i32 %res)
call void asm sideeffect "use $0", "h"(i32 %a)
call void asm sideeffect "use $0", "h"(i32 %b)
ret void
}
; Check that inverting the condition works as well.
define void @f3(i32 %limit) {
; CHECK-LABEL: f3:
; CHECK-DAG: stepa [[REG1:%r[0-5]]]
; CHECK-DAG: stepb [[REG2:%r[0-5]]]
; CHECK-DAG: clfi %r2, 41
; CHECK: selfhrh [[REG3:%r[0-5]]], [[REG1]], [[REG2]]
; CHECK: stepc [[REG3]]
; CHECK: br %r14
entry:
%a = call i32 asm sideeffect "stepa $0", "=h"()
%b = call i32 asm sideeffect "stepb $0", "=h"()
%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 ]
call void asm sideeffect "stepc $0", "h"(i32 %res)
call void asm sideeffect "use $0", "h"(i32 %a)
call void asm sideeffect "use $0", "h"(i32 %b)
ret void
}
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