blob: 44c0e0ca5062fe966cac68701c33816fcd8f8b79 [file] [log] [blame]
; Test 64-bit subtraction in which the second operand is variable.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
declare i64 @foo()
; Check SLGR.
define zeroext i1 @f1(i64 %dummy, i64 %a, i64 %b, ptr %res) {
; CHECK-LABEL: f1:
; CHECK: slgr %r3, %r4
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], -536870912
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 %b)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
ret i1 %obit
}
; Check using the overflow result for a branch.
define void @f2(i64 %dummy, i64 %a, i64 %b, ptr %res) {
; CHECK-LABEL: f2:
; CHECK: slgr %r3, %r4
; CHECK: stg %r3, 0(%r5)
; CHECK: jgle foo@PLT
; CHECK: br %r14
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 %b)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
br i1 %obit, label %call, label %exit
call:
tail call i64 @foo()
br label %exit
exit:
ret void
}
; ... and the same with the inverted direction.
define void @f3(i64 %dummy, i64 %a, i64 %b, ptr %res) {
; CHECK-LABEL: f3:
; CHECK: slgr %r3, %r4
; CHECK: stg %r3, 0(%r5)
; CHECK: jgnle foo@PLT
; CHECK: br %r14
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 %b)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
br i1 %obit, label %exit, label %call
call:
tail call i64 @foo()
br label %exit
exit:
ret void
}
; Check SLG with no displacement.
define zeroext i1 @f4(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f4:
; CHECK: slg %r3, 0(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], -536870912
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%b = load i64, ptr %src
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 %b)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
ret i1 %obit
}
; Check the high end of the aligned SLG range.
define zeroext i1 @f5(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f5:
; CHECK: slg %r3, 524280(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], -536870912
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%ptr = getelementptr i64, ptr %src, i64 65535
%b = load i64, ptr %ptr
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 %b)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
ret i1 %obit
}
; Check the next doubleword up, which needs separate address logic.
; Other sequences besides this one would be OK.
define zeroext i1 @f6(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f6:
; CHECK: agfi %r4, 524288
; CHECK: slg %r3, 0(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], -536870912
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%ptr = getelementptr i64, ptr %src, i64 65536
%b = load i64, ptr %ptr
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 %b)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
ret i1 %obit
}
; Check the high end of the negative aligned SLG range.
define zeroext i1 @f7(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f7:
; CHECK: slg %r3, -8(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], -536870912
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%ptr = getelementptr i64, ptr %src, i64 -1
%b = load i64, ptr %ptr
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 %b)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
ret i1 %obit
}
; Check the low end of the SLG range.
define zeroext i1 @f8(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f8:
; CHECK: slg %r3, -524288(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], -536870912
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%ptr = getelementptr i64, ptr %src, i64 -65536
%b = load i64, ptr %ptr
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 %b)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
ret i1 %obit
}
; Check the next doubleword down, which needs separate address logic.
; Other sequences besides this one would be OK.
define zeroext i1 @f9(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f9:
; CHECK: agfi %r4, -524296
; CHECK: slg %r3, 0(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], -536870912
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%ptr = getelementptr i64, ptr %src, i64 -65537
%b = load i64, ptr %ptr
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 %b)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
ret i1 %obit
}
; Check that SLG allows an index.
define zeroext i1 @f10(i64 %src, i64 %index, i64 %a, ptr %res) {
; CHECK-LABEL: f10:
; CHECK: slg %r4, 524280({{%r3,%r2|%r2,%r3}})
; CHECK-DAG: stg %r4, 0(%r5)
; CHECK-DAG: ipm [[REG:%r[0-5]]]
; CHECK-DAG: afi [[REG]], -536870912
; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
; CHECK: br %r14
%add1 = add i64 %src, %index
%add2 = add i64 %add1, 524280
%ptr = inttoptr i64 %add2 to ptr
%b = load i64, ptr %ptr
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 %b)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
ret i1 %obit
}
; Check that subtractions of spilled values can use SLG rather than SLGR.
define zeroext i1 @f11(ptr %ptr0) {
; CHECK-LABEL: f11:
; CHECK: brasl %r14, foo@PLT
; CHECK: slg %r2, 160(%r15)
; CHECK: br %r14
%ptr1 = getelementptr i64, ptr %ptr0, i64 2
%ptr2 = getelementptr i64, ptr %ptr0, i64 4
%ptr3 = getelementptr i64, ptr %ptr0, i64 6
%ptr4 = getelementptr i64, ptr %ptr0, i64 8
%ptr5 = getelementptr i64, ptr %ptr0, i64 10
%ptr6 = getelementptr i64, ptr %ptr0, i64 12
%ptr7 = getelementptr i64, ptr %ptr0, i64 14
%ptr8 = getelementptr i64, ptr %ptr0, i64 16
%ptr9 = getelementptr i64, ptr %ptr0, i64 18
%val0 = load i64, ptr %ptr0
%val1 = load i64, ptr %ptr1
%val2 = load i64, ptr %ptr2
%val3 = load i64, ptr %ptr3
%val4 = load i64, ptr %ptr4
%val5 = load i64, ptr %ptr5
%val6 = load i64, ptr %ptr6
%val7 = load i64, ptr %ptr7
%val8 = load i64, ptr %ptr8
%val9 = load i64, ptr %ptr9
%ret = call i64 @foo()
%t0 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %ret, i64 %val0)
%add0 = extractvalue {i64, i1} %t0, 0
%obit0 = extractvalue {i64, i1} %t0, 1
%t1 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add0, i64 %val1)
%add1 = extractvalue {i64, i1} %t1, 0
%obit1 = extractvalue {i64, i1} %t1, 1
%res1 = or i1 %obit0, %obit1
%t2 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add1, i64 %val2)
%add2 = extractvalue {i64, i1} %t2, 0
%obit2 = extractvalue {i64, i1} %t2, 1
%res2 = or i1 %res1, %obit2
%t3 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add2, i64 %val3)
%add3 = extractvalue {i64, i1} %t3, 0
%obit3 = extractvalue {i64, i1} %t3, 1
%res3 = or i1 %res2, %obit3
%t4 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add3, i64 %val4)
%add4 = extractvalue {i64, i1} %t4, 0
%obit4 = extractvalue {i64, i1} %t4, 1
%res4 = or i1 %res3, %obit4
%t5 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add4, i64 %val5)
%add5 = extractvalue {i64, i1} %t5, 0
%obit5 = extractvalue {i64, i1} %t5, 1
%res5 = or i1 %res4, %obit5
%t6 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add5, i64 %val6)
%add6 = extractvalue {i64, i1} %t6, 0
%obit6 = extractvalue {i64, i1} %t6, 1
%res6 = or i1 %res5, %obit6
%t7 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add6, i64 %val7)
%add7 = extractvalue {i64, i1} %t7, 0
%obit7 = extractvalue {i64, i1} %t7, 1
%res7 = or i1 %res6, %obit7
%t8 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add7, i64 %val8)
%add8 = extractvalue {i64, i1} %t8, 0
%obit8 = extractvalue {i64, i1} %t8, 1
%res8 = or i1 %res7, %obit8
%t9 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add8, i64 %val9)
%add9 = extractvalue {i64, i1} %t9, 0
%obit9 = extractvalue {i64, i1} %t9, 1
%res9 = or i1 %res8, %obit9
ret i1 %res9
}
declare {i64, i1} @llvm.usub.with.overflow.i64(i64, i64) nounwind readnone