1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3
2 ; Test the three-operand form of 32-bit subtraction.
4 ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
6 declare i32 @foo(i32, i32, i32)
9 define i32 @f1(i32 %dummy, i32 %a, i32 %b, ptr %flag) {
12 ; CHECK-NEXT: slrk %r2, %r3, %r4
14 ; CHECK-NEXT: afi %r0, -536870912
15 ; CHECK-NEXT: srl %r0, 31
16 ; CHECK-NEXT: st %r0, 0(%r5)
18 %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
19 %val = extractvalue {i32, i1} %t, 0
20 %obit = extractvalue {i32, i1} %t, 1
21 %ext = zext i1 %obit to i32
22 store i32 %ext, ptr %flag
26 ; Check using the overflow result for a branch.
27 define i32 @f2(i32 %dummy, i32 %a, i32 %b) {
30 ; CHECK-NEXT: slrk %r2, %r3, %r4
31 ; CHECK-NEXT: bnler %r14
32 ; CHECK-NEXT: .LBB1_1: # %call
33 ; CHECK-NEXT: lhi %r2, 0
34 ; CHECK-NEXT: jg foo@PLT
35 %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
36 %val = extractvalue {i32, i1} %t, 0
37 %obit = extractvalue {i32, i1} %t, 1
38 br i1 %obit, label %call, label %exit
41 %res = tail call i32 @foo(i32 0, i32 %a, i32 %b)
48 ; ... and the same with the inverted direction.
49 define i32 @f3(i32 %dummy, i32 %a, i32 %b) {
52 ; CHECK-NEXT: slrk %r2, %r3, %r4
53 ; CHECK-NEXT: bler %r14
54 ; CHECK-NEXT: .LBB2_1: # %call
55 ; CHECK-NEXT: lhi %r2, 0
56 ; CHECK-NEXT: jg foo@PLT
57 %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
58 %val = extractvalue {i32, i1} %t, 0
59 %obit = extractvalue {i32, i1} %t, 1
60 br i1 %obit, label %exit, label %call
63 %res = tail call i32 @foo(i32 0, i32 %a, i32 %b)
70 ; Check that we can still use SLR in obvious cases.
71 define i32 @f4(i32 %a, i32 %b, ptr %flag) {
74 ; CHECK-NEXT: slr %r2, %r3
76 ; CHECK-NEXT: afi %r0, -536870912
77 ; CHECK-NEXT: srl %r0, 31
78 ; CHECK-NEXT: st %r0, 0(%r4)
80 %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 %b)
81 %val = extractvalue {i32, i1} %t, 0
82 %obit = extractvalue {i32, i1} %t, 1
83 %ext = zext i1 %obit to i32
84 store i32 %ext, ptr %flag
88 declare {i32, i1} @llvm.usub.with.overflow.i32(i32, i32) nounwind readnone