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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3
; Test 64-bit subtraction in which the second operand is constant.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
declare i64 @foo()
; Check addition of 1.
define zeroext i1 @f1(i64 %dummy, i64 %a, ptr %res) {
; CHECK-LABEL: f1:
; CHECK: # %bb.0:
; CHECK-NEXT: slgfi %r3, 1
; CHECK-NEXT: ipm %r0
; CHECK-NEXT: afi %r0, -536870912
; CHECK-NEXT: risbg %r2, %r0, 63, 191, 33
; CHECK-NEXT: stg %r3, 0(%r4)
; CHECK-NEXT: br %r14
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 1)
%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 SLGFI range.
define zeroext i1 @f2(i64 %dummy, i64 %a, ptr %res) {
; CHECK-LABEL: f2:
; CHECK: # %bb.0:
; CHECK-NEXT: slgfi %r3, 4294967295
; CHECK-NEXT: ipm %r0
; CHECK-NEXT: afi %r0, -536870912
; CHECK-NEXT: risbg %r2, %r0, 63, 191, 33
; CHECK-NEXT: stg %r3, 0(%r4)
; CHECK-NEXT: br %r14
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 4294967295)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
ret i1 %obit
}
; Check the next value up, which must be loaded into a register first.
define zeroext i1 @f3(i64 %dummy, i64 %a, ptr %res) {
; CHECK-LABEL: f3:
; CHECK: # %bb.0:
; CHECK-NEXT: llihl %r0, 1
; CHECK-NEXT: slgr %r3, %r0
; CHECK-NEXT: ipm %r0
; CHECK-NEXT: afi %r0, -536870912
; CHECK-NEXT: risbg %r2, %r0, 63, 191, 33
; CHECK-NEXT: stg %r3, 0(%r4)
; CHECK-NEXT: br %r14
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 4294967296)
%val = extractvalue {i64, i1} %t, 0
%obit = extractvalue {i64, i1} %t, 1
store i64 %val, ptr %res
ret i1 %obit
}
; Likewise for negative values.
define zeroext i1 @f4(i64 %dummy, i64 %a, ptr %res) {
; CHECK-LABEL: f4:
; CHECK: # %bb.0:
; CHECK-NEXT: lghi %r0, -1
; CHECK-NEXT: slgr %r3, %r0
; CHECK-NEXT: ipm %r0
; CHECK-NEXT: afi %r0, -536870912
; CHECK-NEXT: risbg %r2, %r0, 63, 191, 33
; CHECK-NEXT: stg %r3, 0(%r4)
; CHECK-NEXT: br %r14
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 -1)
%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 @f5(i64 %dummy, i64 %a, ptr %res) {
; CHECK-LABEL: f5:
; CHECK: # %bb.0:
; CHECK-NEXT: slgfi %r3, 1
; CHECK-NEXT: stg %r3, 0(%r4)
; CHECK-NEXT: jgle foo@PLT
; CHECK-NEXT: .LBB4_1: # %exit
; CHECK-NEXT: br %r14
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 1)
%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 @f6(i64 %dummy, i64 %a, ptr %res) {
; CHECK-LABEL: f6:
; CHECK: # %bb.0:
; CHECK-NEXT: slgfi %r3, 1
; CHECK-NEXT: stg %r3, 0(%r4)
; CHECK-NEXT: jgnle foo@PLT
; CHECK-NEXT: .LBB5_1: # %exit
; CHECK-NEXT: br %r14
%t = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %a, i64 1)
%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
}
declare {i64, i1} @llvm.usub.with.overflow.i64(i64, i64) nounwind readnone
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