; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3 ; Test 32-bit subtraction in which the second operand is constant. ; ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s declare i32 @foo() ; Check subtraction of 1. define zeroext i1 @f1(i32 %dummy, i32 %a, ptr %res) { ; CHECK-LABEL: f1: ; CHECK: # %bb.0: ; CHECK-NEXT: slfi %r3, 1 ; CHECK-NEXT: ipm %r0 ; CHECK-NEXT: afi %r0, -536870912 ; CHECK-NEXT: risbg %r2, %r0, 63, 191, 33 ; CHECK-NEXT: st %r3, 0(%r4) ; CHECK-NEXT: br %r14 %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 1) %val = extractvalue {i32, i1} %t, 0 %obit = extractvalue {i32, i1} %t, 1 store i32 %val, ptr %res ret i1 %obit } ; Check the high end of the SLFI range. define zeroext i1 @f2(i32 %dummy, i32 %a, ptr %res) { ; CHECK-LABEL: f2: ; CHECK: # %bb.0: ; CHECK-NEXT: slfi %r3, 4294967295 ; CHECK-NEXT: ipm %r0 ; CHECK-NEXT: afi %r0, -536870912 ; CHECK-NEXT: risbg %r2, %r0, 63, 191, 33 ; CHECK-NEXT: st %r3, 0(%r4) ; CHECK-NEXT: br %r14 %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 4294967295) %val = extractvalue {i32, i1} %t, 0 %obit = extractvalue {i32, i1} %t, 1 store i32 %val, ptr %res ret i1 %obit } ; Check that negative values are treated as unsigned define zeroext i1 @f3(i32 %dummy, i32 %a, ptr %res) { ; CHECK-LABEL: f3: ; CHECK: # %bb.0: ; CHECK-NEXT: slfi %r3, 4294967295 ; CHECK-NEXT: ipm %r0 ; CHECK-NEXT: afi %r0, -536870912 ; CHECK-NEXT: risbg %r2, %r0, 63, 191, 33 ; CHECK-NEXT: st %r3, 0(%r4) ; CHECK-NEXT: br %r14 %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 -1) %val = extractvalue {i32, i1} %t, 0 %obit = extractvalue {i32, i1} %t, 1 store i32 %val, ptr %res ret i1 %obit } ; Check using the overflow result for a branch. define void @f4(i32 %dummy, i32 %a, ptr %res) { ; CHECK-LABEL: f4: ; CHECK: # %bb.0: ; CHECK-NEXT: slfi %r3, 1 ; CHECK-NEXT: st %r3, 0(%r4) ; CHECK-NEXT: jgle foo@PLT ; CHECK-NEXT: .LBB3_1: # %exit ; CHECK-NEXT: br %r14 %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 1) %val = extractvalue {i32, i1} %t, 0 %obit = extractvalue {i32, i1} %t, 1 store i32 %val, ptr %res br i1 %obit, label %call, label %exit call: tail call i32 @foo() br label %exit exit: ret void } ; ... and the same with the inverted direction. define void @f5(i32 %dummy, i32 %a, ptr %res) { ; CHECK-LABEL: f5: ; CHECK: # %bb.0: ; CHECK-NEXT: slfi %r3, 1 ; CHECK-NEXT: st %r3, 0(%r4) ; CHECK-NEXT: jgnle foo@PLT ; CHECK-NEXT: .LBB4_1: # %exit ; CHECK-NEXT: br %r14 %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 1) %val = extractvalue {i32, i1} %t, 0 %obit = extractvalue {i32, i1} %t, 1 store i32 %val, ptr %res br i1 %obit, label %exit, label %call call: tail call i32 @foo() br label %exit exit: ret void } declare {i32, i1} @llvm.usub.with.overflow.i32(i32, i32) nounwind readnone