a1710eb3cd
The LIT test cases were migrated with the script provided by Nikita Popov. No manual changes were made. Committed without review since no functional changes, after consultation with uweigand.
160 lines
3.5 KiB
LLVM
160 lines
3.5 KiB
LLVM
; Test 64-bit multiplication in which the second operand is constant.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Check multiplication by 2, which should use shifts.
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define i64 @f1(i64 %a, ptr %dest) {
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; CHECK-LABEL: f1:
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; CHECK: sllg %r2, %r2, 1
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; CHECK: br %r14
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%mul = mul i64 %a, 2
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ret i64 %mul
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}
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; Check multiplication by 3.
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define i64 @f2(i64 %a, ptr %dest) {
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; CHECK-LABEL: f2:
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; CHECK: mghi %r2, 3
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; CHECK: br %r14
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%mul = mul i64 %a, 3
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ret i64 %mul
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}
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; Check the high end of the MGHI range.
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define i64 @f3(i64 %a, ptr %dest) {
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; CHECK-LABEL: f3:
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; CHECK: mghi %r2, 32767
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; CHECK: br %r14
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%mul = mul i64 %a, 32767
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ret i64 %mul
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}
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; Check the next value up, which should use shifts.
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define i64 @f4(i64 %a, ptr %dest) {
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; CHECK-LABEL: f4:
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; CHECK: sllg %r2, %r2, 15
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; CHECK: br %r14
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%mul = mul i64 %a, 32768
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ret i64 %mul
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}
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; Check the next value up again, which can use MSGFI.
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define i64 @f5(i64 %a, ptr %dest) {
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; CHECK-LABEL: f5:
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; CHECK: msgfi %r2, 32769
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; CHECK: br %r14
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%mul = mul i64 %a, 32769
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ret i64 %mul
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}
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; Check the high end of the MSGFI range.
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define i64 @f6(i64 %a, ptr %dest) {
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; CHECK-LABEL: f6:
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; CHECK: msgfi %r2, 2147483647
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; CHECK: br %r14
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%mul = mul i64 %a, 2147483647
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ret i64 %mul
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}
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; Check the next value up, which should use shifts.
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define i64 @f7(i64 %a, ptr %dest) {
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; CHECK-LABEL: f7:
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; CHECK: sllg %r2, %r2, 31
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; CHECK: br %r14
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%mul = mul i64 %a, 2147483648
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ret i64 %mul
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}
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; Check the next value up again, which cannot use a constant multiplicatoin.
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define i64 @f8(i64 %a, ptr %dest) {
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; CHECK-LABEL: f8:
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; CHECK-NOT: msgfi
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; CHECK: br %r14
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%mul = mul i64 %a, 2147483649
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ret i64 %mul
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}
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; Check multiplication by -1, which is a negation.
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define i64 @f9(i64 %a, ptr %dest) {
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; CHECK-LABEL: f9:
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; CHECK: lcgr {{%r[0-5]}}, %r2
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; CHECK: br %r14
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%mul = mul i64 %a, -1
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ret i64 %mul
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}
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; Check multiplication by -2, which should use shifts.
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define i64 @f10(i64 %a, ptr %dest) {
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; CHECK-LABEL: f10:
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; CHECK: sllg [[SHIFTED:%r[0-5]]], %r2, 1
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; CHECK: lcgr %r2, [[SHIFTED]]
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; CHECK: br %r14
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%mul = mul i64 %a, -2
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ret i64 %mul
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}
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; Check multiplication by -3.
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define i64 @f11(i64 %a, ptr %dest) {
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; CHECK-LABEL: f11:
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; CHECK: mghi %r2, -3
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; CHECK: br %r14
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%mul = mul i64 %a, -3
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ret i64 %mul
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}
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; Check the lowest useful MGHI value.
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define i64 @f12(i64 %a, ptr %dest) {
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; CHECK-LABEL: f12:
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; CHECK: mghi %r2, -32767
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; CHECK: br %r14
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%mul = mul i64 %a, -32767
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ret i64 %mul
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}
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; Check the next value down, which should use shifts.
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define i64 @f13(i64 %a, ptr %dest) {
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; CHECK-LABEL: f13:
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; CHECK: sllg [[SHIFTED:%r[0-5]]], %r2, 15
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; CHECK: lcgr %r2, [[SHIFTED]]
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; CHECK: br %r14
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%mul = mul i64 %a, -32768
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ret i64 %mul
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}
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; Check the next value down again, which can use MSGFI.
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define i64 @f14(i64 %a, ptr %dest) {
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; CHECK-LABEL: f14:
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; CHECK: msgfi %r2, -32769
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; CHECK: br %r14
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%mul = mul i64 %a, -32769
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ret i64 %mul
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}
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; Check the lowest useful MSGFI value.
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define i64 @f15(i64 %a, ptr %dest) {
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; CHECK-LABEL: f15:
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; CHECK: msgfi %r2, -2147483647
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; CHECK: br %r14
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%mul = mul i64 %a, -2147483647
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ret i64 %mul
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}
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; Check the next value down, which should use shifts.
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define i64 @f16(i64 %a, ptr %dest) {
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; CHECK-LABEL: f16:
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; CHECK: sllg [[SHIFTED:%r[0-5]]], %r2, 31
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; CHECK: lcgr %r2, [[SHIFTED]]
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; CHECK: br %r14
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%mul = mul i64 %a, -2147483648
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ret i64 %mul
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}
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; Check the next value down again, which cannot use constant multiplication
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define i64 @f17(i64 %a, ptr %dest) {
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; CHECK-LABEL: f17:
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; CHECK-NOT: msgfi
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; CHECK: br %r14
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%mul = mul i64 %a, -2147483649
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ret i64 %mul
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}
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