| ; Test 32-bit multiplication in which the second operand is constant. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| ; Check multiplication by 2, which should use shifts. |
| define i32 @f1(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: sll %r2, 1 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, 2 |
| ret i32 %mul |
| } |
| |
| ; Check multiplication by 3. |
| define i32 @f2(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: mhi %r2, 3 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, 3 |
| ret i32 %mul |
| } |
| |
| ; Check the high end of the MHI range. |
| define i32 @f3(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f3: |
| ; CHECK: mhi %r2, 32767 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, 32767 |
| ret i32 %mul |
| } |
| |
| ; Check the next value up, which should use shifts. |
| define i32 @f4(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f4: |
| ; CHECK: sll %r2, 15 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, 32768 |
| ret i32 %mul |
| } |
| |
| ; Check the next value up again, which can use MSFI. |
| define i32 @f5(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f5: |
| ; CHECK: msfi %r2, 32769 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, 32769 |
| ret i32 %mul |
| } |
| |
| ; Check the high end of the MSFI range. |
| define i32 @f6(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f6: |
| ; CHECK: msfi %r2, 2147483647 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, 2147483647 |
| ret i32 %mul |
| } |
| |
| ; Check the next value up, which should use shifts. |
| define i32 @f7(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f7: |
| ; CHECK: sll %r2, 31 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, 2147483648 |
| ret i32 %mul |
| } |
| |
| ; Check the next value up again, which is treated as a negative value. |
| define i32 @f8(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f8: |
| ; CHECK: msfi %r2, -2147483647 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, 2147483649 |
| ret i32 %mul |
| } |
| |
| ; Check multiplication by -1, which is a negation. |
| define i32 @f9(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f9: |
| ; CHECK: lcr %r2, %r2 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, -1 |
| ret i32 %mul |
| } |
| |
| ; Check multiplication by -2, which should use shifts. |
| define i32 @f10(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f10: |
| ; CHECK: sll %r2, 1 |
| ; CHECK: lcr %r2, %r2 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, -2 |
| ret i32 %mul |
| } |
| |
| ; Check multiplication by -3. |
| define i32 @f11(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f11: |
| ; CHECK: mhi %r2, -3 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, -3 |
| ret i32 %mul |
| } |
| |
| ; Check the lowest useful MHI value. |
| define i32 @f12(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f12: |
| ; CHECK: mhi %r2, -32767 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, -32767 |
| ret i32 %mul |
| } |
| |
| ; Check the next value down, which should use shifts. |
| define i32 @f13(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f13: |
| ; CHECK: sll %r2, 15 |
| ; CHECK: lcr %r2, %r2 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, -32768 |
| ret i32 %mul |
| } |
| |
| ; Check the next value down again, which can use MSFI. |
| define i32 @f14(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f14: |
| ; CHECK: msfi %r2, -32769 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, -32769 |
| ret i32 %mul |
| } |
| |
| ; Check the lowest useful MSFI value. |
| define i32 @f15(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f15: |
| ; CHECK: msfi %r2, -2147483647 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, -2147483647 |
| ret i32 %mul |
| } |
| |
| ; Check the next value down, which should use shifts. |
| define i32 @f16(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f16: |
| ; CHECK: sll %r2, 31 |
| ; CHECK-NOT: lcr |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, -2147483648 |
| ret i32 %mul |
| } |
| |
| ; Check the next value down again, which is treated as a positive value. |
| define i32 @f17(i32 %a, ptr %dest) { |
| ; CHECK-LABEL: f17: |
| ; CHECK: msfi %r2, 2147483647 |
| ; CHECK: br %r14 |
| %mul = mul i32 %a, -2147483649 |
| ret i32 %mul |
| } |