forked from OSchip/llvm-project
270 lines
8.6 KiB
LLVM
270 lines
8.6 KiB
LLVM
; Test 64-bit subtraction in which the second operand is variable.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare i64 @foo()
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; Check SLGR.
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define zeroext i1 @f1(i64 %dummy, i64 %a, i64 %b, i64 *%res) {
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; CHECK-LABEL: f1:
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; CHECK: slgr %r3, %r4
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: ipm [[REG:%r[0-5]]]
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; CHECK-DAG: afi [[REG]], -536870912
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; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
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; CHECK: br %r14
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%t = call {i64, i1} @llvm.usub.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 @f2(i64 %dummy, i64 %a, i64 %b, i64 *%res) {
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; CHECK-LABEL: f2:
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; CHECK: slgr %r3, %r4
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; CHECK: stg %r3, 0(%r5)
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; CHECK: jgle foo@PLT
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; CHECK: br %r14
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%t = call {i64, i1} @llvm.usub.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 @f3(i64 %dummy, i64 %a, i64 %b, i64 *%res) {
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; CHECK-LABEL: f3:
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; CHECK: slgr %r3, %r4
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; CHECK: stg %r3, 0(%r5)
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; CHECK: jgnle foo@PLT
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; CHECK: br %r14
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%t = call {i64, i1} @llvm.usub.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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; Check SLG with no displacement.
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define zeroext i1 @f4(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
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; CHECK-LABEL: f4:
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; CHECK: slg %r3, 0(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: ipm [[REG:%r[0-5]]]
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; CHECK-DAG: afi [[REG]], -536870912
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; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
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; CHECK: br %r14
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%b = load i64, i64 *%src
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%t = call {i64, i1} @llvm.usub.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 SLG range.
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define zeroext i1 @f5(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
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; CHECK-LABEL: f5:
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; CHECK: slg %r3, 524280(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: ipm [[REG:%r[0-5]]]
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; CHECK-DAG: afi [[REG]], -536870912
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; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%src, i64 65535
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%b = load i64, i64 *%ptr
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%t = call {i64, i1} @llvm.usub.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 doubleword 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 @f6(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
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; CHECK-LABEL: f6:
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; CHECK: agfi %r4, 524288
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; CHECK: slg %r3, 0(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: ipm [[REG:%r[0-5]]]
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; CHECK-DAG: afi [[REG]], -536870912
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; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%src, i64 65536
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%b = load i64, i64 *%ptr
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%t = call {i64, i1} @llvm.usub.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 SLG range.
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define zeroext i1 @f7(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
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; CHECK-LABEL: f7:
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; CHECK: slg %r3, -8(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: ipm [[REG:%r[0-5]]]
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; CHECK-DAG: afi [[REG]], -536870912
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; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%src, i64 -1
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%b = load i64, i64 *%ptr
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%t = call {i64, i1} @llvm.usub.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 SLG range.
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define zeroext i1 @f8(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
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; CHECK-LABEL: f8:
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; CHECK: slg %r3, -524288(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: ipm [[REG:%r[0-5]]]
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; CHECK-DAG: afi [[REG]], -536870912
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; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%src, i64 -65536
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%b = load i64, i64 *%ptr
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%t = call {i64, i1} @llvm.usub.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 doubleword 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 @f9(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
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; CHECK-LABEL: f9:
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; CHECK: agfi %r4, -524296
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; CHECK: slg %r3, 0(%r4)
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; CHECK-DAG: stg %r3, 0(%r5)
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; CHECK-DAG: ipm [[REG:%r[0-5]]]
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; CHECK-DAG: afi [[REG]], -536870912
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; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%src, i64 -65537
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%b = load i64, i64 *%ptr
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%t = call {i64, i1} @llvm.usub.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 SLG allows an index.
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define zeroext i1 @f10(i64 %src, i64 %index, i64 %a, i64 *%res) {
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; CHECK-LABEL: f10:
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; CHECK: slg %r4, 524280({{%r3,%r2|%r2,%r3}})
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; CHECK-DAG: stg %r4, 0(%r5)
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; CHECK-DAG: ipm [[REG:%r[0-5]]]
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; CHECK-DAG: afi [[REG]], -536870912
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; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
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; CHECK: br %r14
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%add1 = add i64 %src, %index
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%add2 = add i64 %add1, 524280
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%ptr = inttoptr i64 %add2 to i64 *
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%b = load i64, i64 *%ptr
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%t = call {i64, i1} @llvm.usub.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 subtractions of spilled values can use SLG rather than SLGR.
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define zeroext i1 @f11(i64 *%ptr0) {
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; CHECK-LABEL: f11:
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; CHECK: brasl %r14, foo@PLT
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; CHECK: slg %r2, 160(%r15)
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; CHECK: br %r14
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%ptr1 = getelementptr i64, i64 *%ptr0, i64 2
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%ptr2 = getelementptr i64, i64 *%ptr0, i64 4
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%ptr3 = getelementptr i64, i64 *%ptr0, i64 6
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%ptr4 = getelementptr i64, i64 *%ptr0, i64 8
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%ptr5 = getelementptr i64, i64 *%ptr0, i64 10
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%ptr6 = getelementptr i64, i64 *%ptr0, i64 12
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%ptr7 = getelementptr i64, i64 *%ptr0, i64 14
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%ptr8 = getelementptr i64, i64 *%ptr0, i64 16
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%ptr9 = getelementptr i64, i64 *%ptr0, i64 18
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%val0 = load i64, i64 *%ptr0
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%val1 = load i64, i64 *%ptr1
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%val2 = load i64, i64 *%ptr2
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%val3 = load i64, i64 *%ptr3
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%val4 = load i64, i64 *%ptr4
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%val5 = load i64, i64 *%ptr5
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%val6 = load i64, i64 *%ptr6
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%val7 = load i64, i64 *%ptr7
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%val8 = load i64, i64 *%ptr8
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%val9 = load i64, i64 *%ptr9
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%ret = call i64 @foo()
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%t0 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %ret, i64 %val0)
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%add0 = extractvalue {i64, i1} %t0, 0
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%obit0 = extractvalue {i64, i1} %t0, 1
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%t1 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add0, i64 %val1)
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%add1 = extractvalue {i64, i1} %t1, 0
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%obit1 = extractvalue {i64, i1} %t1, 1
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%res1 = or i1 %obit0, %obit1
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%t2 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add1, i64 %val2)
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%add2 = extractvalue {i64, i1} %t2, 0
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%obit2 = extractvalue {i64, i1} %t2, 1
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%res2 = or i1 %res1, %obit2
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%t3 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add2, i64 %val3)
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%add3 = extractvalue {i64, i1} %t3, 0
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%obit3 = extractvalue {i64, i1} %t3, 1
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%res3 = or i1 %res2, %obit3
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%t4 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add3, i64 %val4)
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%add4 = extractvalue {i64, i1} %t4, 0
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%obit4 = extractvalue {i64, i1} %t4, 1
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%res4 = or i1 %res3, %obit4
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%t5 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add4, i64 %val5)
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%add5 = extractvalue {i64, i1} %t5, 0
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%obit5 = extractvalue {i64, i1} %t5, 1
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%res5 = or i1 %res4, %obit5
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%t6 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add5, i64 %val6)
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%add6 = extractvalue {i64, i1} %t6, 0
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%obit6 = extractvalue {i64, i1} %t6, 1
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%res6 = or i1 %res5, %obit6
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%t7 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add6, i64 %val7)
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%add7 = extractvalue {i64, i1} %t7, 0
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%obit7 = extractvalue {i64, i1} %t7, 1
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%res7 = or i1 %res6, %obit7
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%t8 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add7, i64 %val8)
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%add8 = extractvalue {i64, i1} %t8, 0
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%obit8 = extractvalue {i64, i1} %t8, 1
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%res8 = or i1 %res7, %obit8
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%t9 = call {i64, i1} @llvm.usub.with.overflow.i64(i64 %add8, i64 %val9)
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%add9 = extractvalue {i64, i1} %t9, 0
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%obit9 = extractvalue {i64, i1} %t9, 1
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%res9 = or i1 %res8, %obit9
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ret i1 %res9
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}
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declare {i64, i1} @llvm.usub.with.overflow.i64(i64, i64) nounwind readnone
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