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|
; Test subtractions between an i64 and a sign-extended i16 on z14.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 | FileCheck %s
declare i64 @foo()
; Check SGH with no displacement.
define zeroext i1 @f1(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f1:
; CHECK: sgh %r3, 0(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: lghi %r2, 0
; CHECK-DAG: locghio %r2, 1
; CHECK: br %r14
%half = load i16, ptr %src
%b = sext i16 %half to i64
%t = call {i64, i1} @llvm.ssub.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 SGH range.
define zeroext i1 @f4(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f4:
; CHECK: sgh %r3, 524286(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: lghi %r2, 0
; CHECK-DAG: locghio %r2, 1
; CHECK: br %r14
%ptr = getelementptr i16, ptr %src, i64 262143
%half = load i16, ptr %ptr
%b = sext i16 %half to i64
%t = call {i64, i1} @llvm.ssub.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 halfword up, which needs separate address logic.
; Other sequences besides this one would be OK.
define zeroext i1 @f5(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f5:
; CHECK: agfi %r4, 524288
; CHECK: sgh %r3, 0(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: lghi %r2, 0
; CHECK-DAG: locghio %r2, 1
; CHECK: br %r14
%ptr = getelementptr i16, ptr %src, i64 262144
%half = load i16, ptr %ptr
%b = sext i16 %half to i64
%t = call {i64, i1} @llvm.ssub.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 SGH range.
define zeroext i1 @f6(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f6:
; CHECK: sgh %r3, -2(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: lghi %r2, 0
; CHECK-DAG: locghio %r2, 1
; CHECK: br %r14
%ptr = getelementptr i16, ptr %src, i64 -1
%half = load i16, ptr %ptr
%b = sext i16 %half to i64
%t = call {i64, i1} @llvm.ssub.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 SGH range.
define zeroext i1 @f7(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f7:
; CHECK: sgh %r3, -524288(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: lghi %r2, 0
; CHECK-DAG: locghio %r2, 1
; CHECK: br %r14
%ptr = getelementptr i16, ptr %src, i64 -262144
%half = load i16, ptr %ptr
%b = sext i16 %half to i64
%t = call {i64, i1} @llvm.ssub.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 halfword down, which needs separate address logic.
; Other sequences besides this one would be OK.
define zeroext i1 @f8(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f8:
; CHECK: agfi %r4, -524290
; CHECK: sgh %r3, 0(%r4)
; CHECK-DAG: stg %r3, 0(%r5)
; CHECK-DAG: lghi %r2, 0
; CHECK-DAG: locghio %r2, 1
; CHECK: br %r14
%ptr = getelementptr i16, ptr %src, i64 -262145
%half = load i16, ptr %ptr
%b = sext i16 %half to i64
%t = call {i64, i1} @llvm.ssub.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 SGH allows an index.
define zeroext i1 @f9(i64 %src, i64 %index, i64 %a, ptr %res) {
; CHECK-LABEL: f9:
; CHECK: sgh %r4, 524284({{%r3,%r2|%r2,%r3}})
; CHECK-DAG: stg %r4, 0(%r5)
; CHECK-DAG: lghi %r2, 0
; CHECK-DAG: locghio %r2, 1
; CHECK: br %r14
%add1 = add i64 %src, %index
%add2 = add i64 %add1, 524284
%ptr = inttoptr i64 %add2 to ptr
%half = load i16, ptr %ptr
%b = sext i16 %half to i64
%t = call {i64, i1} @llvm.ssub.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 @f11(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f11:
; CHECK: sgh %r3, 0(%r4)
; CHECK: stg %r3, 0(%r5)
; CHECK: jgo foo@PLT
; CHECK: br %r14
%half = load i16, ptr %src
%b = sext i16 %half to i64
%t = call {i64, i1} @llvm.ssub.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 @f12(i64 %dummy, i64 %a, ptr %src, ptr %res) {
; CHECK-LABEL: f12:
; CHECK: sgh %r3, 0(%r4)
; CHECK: stg %r3, 0(%r5)
; CHECK: jgno foo@PLT
; CHECK: br %r14
%half = load i16, ptr %src
%b = sext i16 %half to i64
%t = call {i64, i1} @llvm.ssub.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
}
declare {i64, i1} @llvm.ssub.with.overflow.i64(i64, i64) nounwind readnone
|
