187 lines
5.3 KiB
LLVM
187 lines
5.3 KiB
LLVM
; Test subtractions between an i64 and a sign-extended i16 on z14.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 | FileCheck %s
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declare i64 @foo()
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; Check SGH with no displacement.
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define zeroext i1 @f1(i64 %dummy, i64 %a, i16 *%src, i64 *%res) {
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; CHECK-LABEL: f1:
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; CHECK: sgh %r3, 0(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: lghi %r2, 0
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; CHECK-DAG: locghio %r2, 1
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; CHECK: br %r14
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%half = load i16, i16 *%src
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%b = sext i16 %half to i64
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%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
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%val = extractvalue {i64, i1} %t, 0
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%obit = extractvalue {i64, i1} %t, 1
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store i64 %val, i64 *%res
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ret i1 %obit
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}
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; Check the high end of the aligned SGH range.
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define zeroext i1 @f4(i64 %dummy, i64 %a, i16 *%src, i64 *%res) {
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; CHECK-LABEL: f4:
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; CHECK: sgh %r3, 524286(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: lghi %r2, 0
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; CHECK-DAG: locghio %r2, 1
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; CHECK: br %r14
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%ptr = getelementptr i16, i16 *%src, i64 262143
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%half = load i16, i16 *%ptr
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%b = sext i16 %half to i64
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%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
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%val = extractvalue {i64, i1} %t, 0
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%obit = extractvalue {i64, i1} %t, 1
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store i64 %val, i64 *%res
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ret i1 %obit
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}
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; Check the next halfword up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define zeroext i1 @f5(i64 %dummy, i64 %a, i16 *%src, i64 *%res) {
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; CHECK-LABEL: f5:
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; CHECK: agfi %r4, 524288
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; CHECK: sgh %r3, 0(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: lghi %r2, 0
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; CHECK-DAG: locghio %r2, 1
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; CHECK: br %r14
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%ptr = getelementptr i16, i16 *%src, i64 262144
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%half = load i16, i16 *%ptr
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%b = sext i16 %half to i64
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%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
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%val = extractvalue {i64, i1} %t, 0
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%obit = extractvalue {i64, i1} %t, 1
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store i64 %val, i64 *%res
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ret i1 %obit
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}
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; Check the high end of the negative aligned SGH range.
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define zeroext i1 @f6(i64 %dummy, i64 %a, i16 *%src, i64 *%res) {
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; CHECK-LABEL: f6:
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; CHECK: sgh %r3, -2(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: lghi %r2, 0
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; CHECK-DAG: locghio %r2, 1
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; CHECK: br %r14
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%ptr = getelementptr i16, i16 *%src, i64 -1
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%half = load i16, i16 *%ptr
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%b = sext i16 %half to i64
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%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
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%val = extractvalue {i64, i1} %t, 0
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%obit = extractvalue {i64, i1} %t, 1
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store i64 %val, i64 *%res
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ret i1 %obit
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}
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; Check the low end of the SGH range.
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define zeroext i1 @f7(i64 %dummy, i64 %a, i16 *%src, i64 *%res) {
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; CHECK-LABEL: f7:
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; CHECK: sgh %r3, -524288(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: lghi %r2, 0
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; CHECK-DAG: locghio %r2, 1
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; CHECK: br %r14
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%ptr = getelementptr i16, i16 *%src, i64 -262144
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%half = load i16, i16 *%ptr
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%b = sext i16 %half to i64
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%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
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%val = extractvalue {i64, i1} %t, 0
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%obit = extractvalue {i64, i1} %t, 1
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store i64 %val, i64 *%res
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ret i1 %obit
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}
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; Check the next halfword down, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define zeroext i1 @f8(i64 %dummy, i64 %a, i16 *%src, i64 *%res) {
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; CHECK-LABEL: f8:
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; CHECK: agfi %r4, -524290
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; CHECK: sgh %r3, 0(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: lghi %r2, 0
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; CHECK-DAG: locghio %r2, 1
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; CHECK: br %r14
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%ptr = getelementptr i16, i16 *%src, i64 -262145
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%half = load i16, i16 *%ptr
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%b = sext i16 %half to i64
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%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
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%val = extractvalue {i64, i1} %t, 0
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%obit = extractvalue {i64, i1} %t, 1
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store i64 %val, i64 *%res
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ret i1 %obit
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}
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; Check that SGH allows an index.
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define zeroext i1 @f9(i64 %src, i64 %index, i64 %a, i64 *%res) {
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; CHECK-LABEL: f9:
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; CHECK: sgh %r4, 524284({{%r3,%r2|%r2,%r3}})
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; CHECK-DAG: stg %r4, 0(%r5)
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; CHECK-DAG: lghi %r2, 0
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; CHECK-DAG: locghio %r2, 1
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; CHECK: br %r14
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%add1 = add i64 %src, %index
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%add2 = add i64 %add1, 524284
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%ptr = inttoptr i64 %add2 to i16 *
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%half = load i16, i16 *%ptr
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%b = sext i16 %half to i64
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%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
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%val = extractvalue {i64, i1} %t, 0
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%obit = extractvalue {i64, i1} %t, 1
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store i64 %val, i64 *%res
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ret i1 %obit
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}
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; Check using the overflow result for a branch.
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define void @f11(i64 %dummy, i64 %a, i16 *%src, i64 *%res) {
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; CHECK-LABEL: f11:
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; CHECK: sgh %r3, 0(%r4)
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; CHECK: stg %r3, 0(%r5)
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; CHECK: jgo foo@PLT
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; CHECK: br %r14
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%half = load i16, i16 *%src
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%b = sext i16 %half to i64
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%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
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%val = extractvalue {i64, i1} %t, 0
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%obit = extractvalue {i64, i1} %t, 1
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store i64 %val, i64 *%res
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br i1 %obit, label %call, label %exit
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call:
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tail call i64 @foo()
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br label %exit
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exit:
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ret void
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}
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; ... and the same with the inverted direction.
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define void @f12(i64 %dummy, i64 %a, i16 *%src, i64 *%res) {
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; CHECK-LABEL: f12:
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; CHECK: sgh %r3, 0(%r4)
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; CHECK: stg %r3, 0(%r5)
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; CHECK: jgno foo@PLT
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; CHECK: br %r14
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%half = load i16, i16 *%src
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%b = sext i16 %half to i64
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%t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
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%val = extractvalue {i64, i1} %t, 0
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%obit = extractvalue {i64, i1} %t, 1
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store i64 %val, i64 *%res
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br i1 %obit, label %exit, label %call
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call:
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tail call i64 @foo()
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br label %exit
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exit:
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ret void
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}
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declare {i64, i1} @llvm.ssub.with.overflow.i64(i64, i64) nounwind readnone
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