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; Testg 64-bit unsigned division and remainder.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
declare i64 @foo()
; Testg register division. The result is in the second of the two registers.
define void @f1(i64 %dummy, i64 %a, i64 %b, i64 *%dest) {
; CHECK-LABEL: f1:
; CHECK-NOT: %r3
; CHECK: {{llill|lghi}} %r2, 0
; CHECK-NOT: %r3
; CHECK: dlgr %r2, %r4
; CHECK: stg %r3, 0(%r5)
; CHECK: br %r14
%div = udiv i64 %a, %b
store i64 %div, i64 *%dest
ret void
}
; Testg register remainder. The result is in the first of the two registers.
define void @f2(i64 %dummy, i64 %a, i64 %b, i64 *%dest) {
; CHECK-LABEL: f2:
; CHECK-NOT: %r3
; CHECK: {{llill|lghi}} %r2, 0
; CHECK-NOT: %r3
; CHECK: dlgr %r2, %r4
; CHECK: stg %r2, 0(%r5)
; CHECK: br %r14
%rem = urem i64 %a, %b
store i64 %rem, i64 *%dest
ret void
}
; Testg that division and remainder use a single instruction.
define i64 @f3(i64 %dummy1, i64 %a, i64 %b) {
; CHECK-LABEL: f3:
; CHECK-NOT: %r3
; CHECK: {{llill|lghi}} %r2, 0
; CHECK-NOT: %r3
; CHECK: dlgr %r2, %r4
; CHECK-NOT: dlgr
; CHECK: ogr %r2, %r3
; CHECK: br %r14
%div = udiv i64 %a, %b
%rem = urem i64 %a, %b
%or = or i64 %rem, %div
ret i64 %or
}
; Testg memory division with no displacement.
define void @f4(i64 %dummy, i64 %a, i64 *%src, i64 *%dest) {
; CHECK-LABEL: f4:
; CHECK-NOT: %r3
; CHECK: {{llill|lghi}} %r2, 0
; CHECK-NOT: %r3
; CHECK: dlg %r2, 0(%r4)
; CHECK: stg %r3, 0(%r5)
; CHECK: br %r14
%b = load i64 *%src
%div = udiv i64 %a, %b
store i64 %div, i64 *%dest
ret void
}
; Testg memory remainder with no displacement.
define void @f5(i64 %dummy, i64 %a, i64 *%src, i64 *%dest) {
; CHECK-LABEL: f5:
; CHECK-NOT: %r3
; CHECK: {{llill|lghi}} %r2, 0
; CHECK-NOT: %r3
; CHECK: dlg %r2, 0(%r4)
; CHECK: stg %r2, 0(%r5)
; CHECK: br %r14
%b = load i64 *%src
%rem = urem i64 %a, %b
store i64 %rem, i64 *%dest
ret void
}
; Testg both memory division and memory remainder.
define i64 @f6(i64 %dummy, i64 %a, i64 *%src) {
; CHECK-LABEL: f6:
; CHECK-NOT: %r3
; CHECK: {{llill|lghi}} %r2, 0
; CHECK-NOT: %r3
; CHECK: dlg %r2, 0(%r4)
; CHECK-NOT: {{dlg|dlgr}}
; CHECK: ogr %r2, %r3
; CHECK: br %r14
%b = load i64 *%src
%div = udiv i64 %a, %b
%rem = urem i64 %a, %b
%or = or i64 %rem, %div
ret i64 %or
}
; Check the high end of the DLG range.
define i64 @f7(i64 %dummy, i64 %a, i64 *%src) {
; CHECK-LABEL: f7:
; CHECK: dlg %r2, 524280(%r4)
; CHECK: br %r14
%ptr = getelementptr i64 *%src, i64 65535
%b = load i64 *%ptr
%rem = urem i64 %a, %b
ret i64 %rem
}
; Check the next doubleword up, which needs separate address logic.
; Other sequences besides this one would be OK.
define i64 @f8(i64 %dummy, i64 %a, i64 *%src) {
; CHECK-LABEL: f8:
; CHECK: agfi %r4, 524288
; CHECK: dlg %r2, 0(%r4)
; CHECK: br %r14
%ptr = getelementptr i64 *%src, i64 65536
%b = load i64 *%ptr
%rem = urem i64 %a, %b
ret i64 %rem
}
; Check the high end of the negative aligned DLG range.
define i64 @f9(i64 %dummy, i64 %a, i64 *%src) {
; CHECK-LABEL: f9:
; CHECK: dlg %r2, -8(%r4)
; CHECK: br %r14
%ptr = getelementptr i64 *%src, i64 -1
%b = load i64 *%ptr
%rem = urem i64 %a, %b
ret i64 %rem
}
; Check the low end of the DLG range.
define i64 @f10(i64 %dummy, i64 %a, i64 *%src) {
; CHECK-LABEL: f10:
; CHECK: dlg %r2, -524288(%r4)
; CHECK: br %r14
%ptr = getelementptr i64 *%src, i64 -65536
%b = load i64 *%ptr
%rem = urem i64 %a, %b
ret i64 %rem
}
; Check the next doubleword down, which needs separate address logic.
; Other sequences besides this one would be OK.
define i64 @f11(i64 %dummy, i64 %a, i64 *%src) {
; CHECK-LABEL: f11:
; CHECK: agfi %r4, -524296
; CHECK: dlg %r2, 0(%r4)
; CHECK: br %r14
%ptr = getelementptr i64 *%src, i64 -65537
%b = load i64 *%ptr
%rem = urem i64 %a, %b
ret i64 %rem
}
; Check that DLG allows an index.
define i64 @f12(i64 %dummy, i64 %a, i64 %src, i64 %index) {
; CHECK-LABEL: f12:
; CHECK: dlg %r2, 524287(%r5,%r4)
; CHECK: br %r14
%add1 = add i64 %src, %index
%add2 = add i64 %add1, 524287
%ptr = inttoptr i64 %add2 to i64 *
%b = load i64 *%ptr
%rem = urem i64 %a, %b
ret i64 %rem
}
; Check that divisions of spilled values can use DLG rather than DLGR.
define i64 @f13(i64 *%ptr0) {
; CHECK-LABEL: f13:
; CHECK: brasl %r14, foo@PLT
; CHECK: dlg {{%r[0-9]+}}, 160(%r15)
; CHECK: br %r14
%ptr1 = getelementptr i64 *%ptr0, i64 2
%ptr2 = getelementptr i64 *%ptr0, i64 4
%ptr3 = getelementptr i64 *%ptr0, i64 6
%ptr4 = getelementptr i64 *%ptr0, i64 8
%ptr5 = getelementptr i64 *%ptr0, i64 10
%ptr6 = getelementptr i64 *%ptr0, i64 12
%ptr7 = getelementptr i64 *%ptr0, i64 14
%ptr8 = getelementptr i64 *%ptr0, i64 16
%ptr9 = getelementptr i64 *%ptr0, i64 18
%ptr10 = getelementptr i64 *%ptr0, i64 20
%val0 = load i64 *%ptr0
%val1 = load i64 *%ptr1
%val2 = load i64 *%ptr2
%val3 = load i64 *%ptr3
%val4 = load i64 *%ptr4
%val5 = load i64 *%ptr5
%val6 = load i64 *%ptr6
%val7 = load i64 *%ptr7
%val8 = load i64 *%ptr8
%val9 = load i64 *%ptr9
%val10 = load i64 *%ptr10
%ret = call i64 @foo()
%div0 = udiv i64 %ret, %val0
%div1 = udiv i64 %div0, %val1
%div2 = udiv i64 %div1, %val2
%div3 = udiv i64 %div2, %val3
%div4 = udiv i64 %div3, %val4
%div5 = udiv i64 %div4, %val5
%div6 = udiv i64 %div5, %val6
%div7 = udiv i64 %div6, %val7
%div8 = udiv i64 %div7, %val8
%div9 = udiv i64 %div8, %val9
%div10 = udiv i64 %div9, %val10
ret i64 %div10
}
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