forked from OSchip/llvm-project
160 lines
3.4 KiB
LLVM
160 lines
3.4 KiB
LLVM
; Test 32-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 i32 @f1(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f1:
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; CHECK: sll %r2, 1
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; CHECK: br %r14
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%mul = mul i32 %a, 2
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ret i32 %mul
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}
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; Check multiplication by 3.
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define i32 @f2(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f2:
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; CHECK: mhi %r2, 3
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; CHECK: br %r14
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%mul = mul i32 %a, 3
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ret i32 %mul
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}
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; Check the high end of the MHI range.
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define i32 @f3(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f3:
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; CHECK: mhi %r2, 32767
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; CHECK: br %r14
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%mul = mul i32 %a, 32767
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ret i32 %mul
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}
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; Check the next value up, which should use shifts.
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define i32 @f4(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f4:
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; CHECK: sll %r2, 15
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; CHECK: br %r14
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%mul = mul i32 %a, 32768
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ret i32 %mul
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}
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; Check the next value up again, which can use MSFI.
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define i32 @f5(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f5:
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; CHECK: msfi %r2, 32769
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; CHECK: br %r14
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%mul = mul i32 %a, 32769
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ret i32 %mul
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}
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; Check the high end of the MSFI range.
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define i32 @f6(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f6:
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; CHECK: msfi %r2, 2147483647
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; CHECK: br %r14
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%mul = mul i32 %a, 2147483647
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ret i32 %mul
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}
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; Check the next value up, which should use shifts.
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define i32 @f7(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f7:
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; CHECK: sll %r2, 31
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; CHECK: br %r14
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%mul = mul i32 %a, 2147483648
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ret i32 %mul
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}
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; Check the next value up again, which is treated as a negative value.
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define i32 @f8(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f8:
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; CHECK: msfi %r2, -2147483647
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; CHECK: br %r14
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%mul = mul i32 %a, 2147483649
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ret i32 %mul
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}
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; Check multiplication by -1, which is a negation.
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define i32 @f9(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f9:
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; CHECK: lcr %r2, %r2
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; CHECK: br %r14
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%mul = mul i32 %a, -1
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ret i32 %mul
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}
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; Check multiplication by -2, which should use shifts.
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define i32 @f10(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f10:
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; CHECK: sll %r2, 1
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; CHECK: lcr %r2, %r2
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; CHECK: br %r14
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%mul = mul i32 %a, -2
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ret i32 %mul
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}
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; Check multiplication by -3.
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define i32 @f11(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f11:
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; CHECK: mhi %r2, -3
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; CHECK: br %r14
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%mul = mul i32 %a, -3
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ret i32 %mul
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}
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; Check the lowest useful MHI value.
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define i32 @f12(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f12:
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; CHECK: mhi %r2, -32767
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; CHECK: br %r14
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%mul = mul i32 %a, -32767
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ret i32 %mul
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}
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; Check the next value down, which should use shifts.
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define i32 @f13(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f13:
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; CHECK: sll %r2, 15
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; CHECK: lcr %r2, %r2
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; CHECK: br %r14
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%mul = mul i32 %a, -32768
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ret i32 %mul
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}
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; Check the next value down again, which can use MSFI.
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define i32 @f14(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f14:
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; CHECK: msfi %r2, -32769
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; CHECK: br %r14
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%mul = mul i32 %a, -32769
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ret i32 %mul
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}
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; Check the lowest useful MSFI value.
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define i32 @f15(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f15:
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; CHECK: msfi %r2, -2147483647
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; CHECK: br %r14
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%mul = mul i32 %a, -2147483647
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ret i32 %mul
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}
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; Check the next value down, which should use shifts.
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define i32 @f16(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f16:
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; CHECK: sll %r2, 31
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; CHECK-NOT: lcr
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; CHECK: br %r14
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%mul = mul i32 %a, -2147483648
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ret i32 %mul
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}
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; Check the next value down again, which is treated as a positive value.
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define i32 @f17(i32 %a, i32 *%dest) {
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; CHECK-LABEL: f17:
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; CHECK: msfi %r2, 2147483647
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; CHECK: br %r14
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%mul = mul i32 %a, -2147483649
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ret i32 %mul
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}
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