| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc -verify-machineinstrs -mtriple=powerpc-unknown-linux-gnu -mcpu=ppc64 < %s | FileCheck --check-prefix=CHECK %s |
| ; RUN: llc -verify-machineinstrs -mtriple=powerpc-unknown-linux-gnu -mcpu=ppc < %s | FileCheck --check-prefix=CHECK %s |
| |
| define i32 @fold_srem_positive_odd(i32 %x) { |
| ; CHECK-LABEL: fold_srem_positive_odd: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: lis 4, -21386 |
| ; CHECK-NEXT: ori 4, 4, 37253 |
| ; CHECK-NEXT: mulhw 4, 3, 4 |
| ; CHECK-NEXT: add 4, 4, 3 |
| ; CHECK-NEXT: srwi 5, 4, 31 |
| ; CHECK-NEXT: srawi 4, 4, 6 |
| ; CHECK-NEXT: add 4, 4, 5 |
| ; CHECK-NEXT: mulli 4, 4, 95 |
| ; CHECK-NEXT: sub 3, 3, 4 |
| ; CHECK-NEXT: blr |
| %1 = srem i32 %x, 95 |
| ret i32 %1 |
| } |
| |
| |
| define i32 @fold_srem_positive_even(i32 %x) { |
| ; CHECK-LABEL: fold_srem_positive_even: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: lis 4, 15827 |
| ; CHECK-NEXT: ori 4, 4, 36849 |
| ; CHECK-NEXT: mulhw 4, 3, 4 |
| ; CHECK-NEXT: srwi 5, 4, 31 |
| ; CHECK-NEXT: srawi 4, 4, 8 |
| ; CHECK-NEXT: add 4, 4, 5 |
| ; CHECK-NEXT: mulli 4, 4, 1060 |
| ; CHECK-NEXT: sub 3, 3, 4 |
| ; CHECK-NEXT: blr |
| %1 = srem i32 %x, 1060 |
| ret i32 %1 |
| } |
| |
| |
| define i32 @fold_srem_negative_odd(i32 %x) { |
| ; CHECK-LABEL: fold_srem_negative_odd: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: lis 4, -23206 |
| ; CHECK-NEXT: ori 4, 4, 65445 |
| ; CHECK-NEXT: mulhw 4, 3, 4 |
| ; CHECK-NEXT: srwi 5, 4, 31 |
| ; CHECK-NEXT: srawi 4, 4, 8 |
| ; CHECK-NEXT: add 4, 4, 5 |
| ; CHECK-NEXT: mulli 4, 4, -723 |
| ; CHECK-NEXT: sub 3, 3, 4 |
| ; CHECK-NEXT: blr |
| %1 = srem i32 %x, -723 |
| ret i32 %1 |
| } |
| |
| |
| define i32 @fold_srem_negative_even(i32 %x) { |
| ; CHECK-LABEL: fold_srem_negative_even: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: lis 4, -731 |
| ; CHECK-NEXT: ori 4, 4, 62439 |
| ; CHECK-NEXT: mulhw 4, 3, 4 |
| ; CHECK-NEXT: srwi 5, 4, 31 |
| ; CHECK-NEXT: srawi 4, 4, 8 |
| ; CHECK-NEXT: add 4, 4, 5 |
| ; CHECK-NEXT: mulli 4, 4, -22981 |
| ; CHECK-NEXT: sub 3, 3, 4 |
| ; CHECK-NEXT: blr |
| %1 = srem i32 %x, -22981 |
| ret i32 %1 |
| } |
| |
| |
| ; Don't fold if we can combine srem with sdiv. |
| define i32 @combine_srem_sdiv(i32 %x) { |
| ; CHECK-LABEL: combine_srem_sdiv: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: lis 4, -21386 |
| ; CHECK-NEXT: ori 4, 4, 37253 |
| ; CHECK-NEXT: mulhw 4, 3, 4 |
| ; CHECK-NEXT: add 4, 4, 3 |
| ; CHECK-NEXT: srwi 5, 4, 31 |
| ; CHECK-NEXT: srawi 4, 4, 6 |
| ; CHECK-NEXT: add 4, 4, 5 |
| ; CHECK-NEXT: mulli 5, 4, 95 |
| ; CHECK-NEXT: sub 3, 3, 5 |
| ; CHECK-NEXT: add 3, 3, 4 |
| ; CHECK-NEXT: blr |
| %1 = srem i32 %x, 95 |
| %2 = sdiv i32 %x, 95 |
| %3 = add i32 %1, %2 |
| ret i32 %3 |
| } |
| |
| ; Don't fold for divisors that are a power of two. |
| define i32 @dont_fold_srem_power_of_two(i32 %x) { |
| ; CHECK-LABEL: dont_fold_srem_power_of_two: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: srawi 4, 3, 6 |
| ; CHECK-NEXT: addze 4, 4 |
| ; CHECK-NEXT: slwi 4, 4, 6 |
| ; CHECK-NEXT: sub 3, 3, 4 |
| ; CHECK-NEXT: blr |
| %1 = srem i32 %x, 64 |
| ret i32 %1 |
| } |
| |
| ; Don't fold if the divisor is one. |
| define i32 @dont_fold_srem_one(i32 %x) { |
| ; CHECK-LABEL: dont_fold_srem_one: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: li 3, 0 |
| ; CHECK-NEXT: blr |
| %1 = srem i32 %x, 1 |
| ret i32 %1 |
| } |
| |
| ; Don't fold if the divisor is 2^31. |
| define i32 @dont_fold_srem_i32_smax(i32 %x) { |
| ; CHECK-LABEL: dont_fold_srem_i32_smax: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: srawi 4, 3, 31 |
| ; CHECK-NEXT: addze 4, 4 |
| ; CHECK-NEXT: slwi 4, 4, 31 |
| ; CHECK-NEXT: add 3, 3, 4 |
| ; CHECK-NEXT: blr |
| %1 = srem i32 %x, 2147483648 |
| ret i32 %1 |
| } |
| |
| ; Don't fold i64 srem |
| define i64 @dont_fold_srem_i64(i64 %x) { |
| ; CHECK-LABEL: dont_fold_srem_i64: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: mflr 0 |
| ; CHECK-NEXT: stw 0, 4(1) |
| ; CHECK-NEXT: stwu 1, -16(1) |
| ; CHECK-NEXT: .cfi_def_cfa_offset 16 |
| ; CHECK-NEXT: .cfi_offset lr, 4 |
| ; CHECK-NEXT: li 5, 0 |
| ; CHECK-NEXT: li 6, 98 |
| ; CHECK-NEXT: bl __moddi3 |
| ; CHECK-NEXT: lwz 0, 20(1) |
| ; CHECK-NEXT: addi 1, 1, 16 |
| ; CHECK-NEXT: mtlr 0 |
| ; CHECK-NEXT: blr |
| %1 = srem i64 %x, 98 |
| ret i64 %1 |
| } |