| ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py |
| ; RUN: opt -S -analyze -enable-new-pm=0 -scalar-evolution < %s | FileCheck %s |
| ; RUN: opt -S -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s |
| |
| ; These testcases aren't *identical* but they have the same/similar meaning. |
| |
| ; The obvious case. |
| define i32 @div(i32 %val, i32 %num) nounwind { |
| ; CHECK-LABEL: 'div' |
| ; CHECK-NEXT: Classifying expressions for: @div |
| ; CHECK-NEXT: %tmp1 = udiv i32 %val, %num |
| ; CHECK-NEXT: --> (%val /u %num) U: full-set S: full-set |
| ; CHECK-NEXT: %tmp2 = mul i32 %tmp1, %num |
| ; CHECK-NEXT: --> ((%val /u %num) * %num) U: full-set S: full-set |
| ; CHECK-NEXT: Determining loop execution counts for: @div |
| ; |
| %tmp1 = udiv i32 %val, %num |
| %tmp2 = mul i32 %tmp1, %num |
| ret i32 %tmp2 |
| } |
| |
| define i32 @sdiv(i32 %val, i32 %num) nounwind { |
| ; CHECK-LABEL: 'sdiv' |
| ; CHECK-NEXT: Classifying expressions for: @sdiv |
| ; CHECK-NEXT: %tmp1 = sdiv i32 %val, %num |
| ; CHECK-NEXT: --> %tmp1 U: full-set S: full-set |
| ; CHECK-NEXT: %tmp2 = mul i32 %tmp1, %num |
| ; CHECK-NEXT: --> (%num * %tmp1) U: full-set S: full-set |
| ; CHECK-NEXT: Determining loop execution counts for: @sdiv |
| ; |
| %tmp1 = sdiv i32 %val, %num |
| %tmp2 = mul i32 %tmp1, %num |
| ret i32 %tmp2 |
| } |
| |
| ; Or, it could be a number of equivalent patterns with mask: |
| ; b) x & (-1 << nbits) |
| ; d) x >> (32 - y) << (32 - y) |
| |
| define i32 @mask_b(i32 %val, i32 %numlowbits) nounwind { |
| ; CHECK-LABEL: 'mask_b' |
| ; CHECK-NEXT: Classifying expressions for: @mask_b |
| ; CHECK-NEXT: %mask = shl i32 -1, %numlowbits |
| ; CHECK-NEXT: --> %mask U: full-set S: full-set |
| ; CHECK-NEXT: %masked = and i32 %mask, %val |
| ; CHECK-NEXT: --> %masked U: full-set S: full-set |
| ; CHECK-NEXT: Determining loop execution counts for: @mask_b |
| ; |
| %mask = shl i32 -1, %numlowbits |
| %masked = and i32 %mask, %val |
| ret i32 %masked |
| } |
| |
| define i32 @mask_d(i32 %val, i32 %lowbits) nounwind { |
| ; CHECK-LABEL: 'mask_d' |
| ; CHECK-NEXT: Classifying expressions for: @mask_d |
| ; CHECK-NEXT: %numlowbits = sub i32 32, %lowbits |
| ; CHECK-NEXT: --> (32 + (-1 * %lowbits)) U: full-set S: full-set |
| ; CHECK-NEXT: %lowbitscleared = lshr i32 %val, %numlowbits |
| ; CHECK-NEXT: --> %lowbitscleared U: full-set S: full-set |
| ; CHECK-NEXT: %masked = shl i32 %lowbitscleared, %numlowbits |
| ; CHECK-NEXT: --> %masked U: full-set S: full-set |
| ; CHECK-NEXT: Determining loop execution counts for: @mask_d |
| ; |
| %numlowbits = sub i32 32, %lowbits |
| %lowbitscleared = lshr i32 %val, %numlowbits |
| %masked = shl i32 %lowbitscleared, %numlowbits |
| ret i32 %masked |
| } |