| ; 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 |
| |
| ; The obvious case. |
| define i32 @mul_biggerShl(i32 %val) nounwind { |
| ; CHECK-LABEL: 'mul_biggerShl' |
| ; CHECK-NEXT: Classifying expressions for: @mul_biggerShl |
| ; CHECK-NEXT: %tmp1 = mul i32 %val, 64 |
| ; CHECK-NEXT: --> (64 * %val) U: [0,-63) S: [-2147483648,2147483585) |
| ; CHECK-NEXT: %tmp2 = udiv i32 %tmp1, 16 |
| ; CHECK-NEXT: --> ((64 * %val) /u 16) U: [0,268435453) S: [0,268435456) |
| ; CHECK-NEXT: Determining loop execution counts for: @mul_biggerShl |
| ; |
| %tmp1 = mul i32 %val, 64 |
| %tmp2 = udiv i32 %tmp1, 16 |
| ret i32 %tmp2 |
| } |
| |
| define i32 @mul_biggerLshl(i32 %val) nounwind { |
| ; CHECK-LABEL: 'mul_biggerLshl' |
| ; CHECK-NEXT: Classifying expressions for: @mul_biggerLshl |
| ; CHECK-NEXT: %tmp1 = mul i32 %val, 16 |
| ; CHECK-NEXT: --> (16 * %val) U: [0,-15) S: [-2147483648,2147483633) |
| ; CHECK-NEXT: %tmp2 = udiv i32 %tmp1, 64 |
| ; CHECK-NEXT: --> ((16 * %val) /u 64) U: [0,67108864) S: [0,67108864) |
| ; CHECK-NEXT: Determining loop execution counts for: @mul_biggerLshl |
| ; |
| %tmp1 = mul i32 %val, 16 |
| %tmp2 = udiv i32 %tmp1, 64 |
| ret i32 %tmp2 |
| } |
| |
| ; Or, it could have been transformed to shifts |
| |
| define i32 @shifty_biggerShl(i32 %val) { |
| ; CHECK-LABEL: 'shifty_biggerShl' |
| ; CHECK-NEXT: Classifying expressions for: @shifty_biggerShl |
| ; CHECK-NEXT: %tmp1 = shl i32 %val, 6 |
| ; CHECK-NEXT: --> (64 * %val) U: [0,-63) S: [-2147483648,2147483585) |
| ; CHECK-NEXT: %tmp2 = lshr i32 %tmp1, 4 |
| ; CHECK-NEXT: --> ((64 * %val) /u 16) U: [0,268435453) S: [0,268435456) |
| ; CHECK-NEXT: Determining loop execution counts for: @shifty_biggerShl |
| ; |
| %tmp1 = shl i32 %val, 6 |
| %tmp2 = lshr i32 %tmp1, 4 |
| ret i32 %tmp2 |
| } |
| |
| define i32 @shifty_biggerShl_shlnuw(i32 %val) { |
| ; CHECK-LABEL: 'shifty_biggerShl_shlnuw' |
| ; CHECK-NEXT: Classifying expressions for: @shifty_biggerShl_shlnuw |
| ; CHECK-NEXT: %tmp1 = shl nuw i32 %val, 6 |
| ; CHECK-NEXT: --> (64 * %val) U: [0,-63) S: [-2147483648,2147483585) |
| ; CHECK-NEXT: %tmp2 = lshr i32 %tmp1, 4 |
| ; CHECK-NEXT: --> ((64 * %val) /u 16) U: [0,268435453) S: [0,268435456) |
| ; CHECK-NEXT: Determining loop execution counts for: @shifty_biggerShl_shlnuw |
| ; |
| %tmp1 = shl nuw i32 %val, 6 |
| %tmp2 = lshr i32 %tmp1, 4 |
| ret i32 %tmp2 |
| } |
| |
| define i32 @shifty_biggerLshr(i32 %val) { |
| ; CHECK-LABEL: 'shifty_biggerLshr' |
| ; CHECK-NEXT: Classifying expressions for: @shifty_biggerLshr |
| ; CHECK-NEXT: %tmp1 = shl i32 %val, 4 |
| ; CHECK-NEXT: --> (16 * %val) U: [0,-15) S: [-2147483648,2147483633) |
| ; CHECK-NEXT: %tmp2 = lshr i32 %tmp1, 6 |
| ; CHECK-NEXT: --> ((16 * %val) /u 64) U: [0,67108864) S: [0,67108864) |
| ; CHECK-NEXT: Determining loop execution counts for: @shifty_biggerLshr |
| ; |
| %tmp1 = shl i32 %val, 4 |
| %tmp2 = lshr i32 %tmp1, 6 |
| ret i32 %tmp2 |
| } |
| |
| define i32 @shifty_biggerLshr_shlnuw(i32 %val) { |
| ; CHECK-LABEL: 'shifty_biggerLshr_shlnuw' |
| ; CHECK-NEXT: Classifying expressions for: @shifty_biggerLshr_shlnuw |
| ; CHECK-NEXT: %tmp1 = shl nuw i32 %val, 4 |
| ; CHECK-NEXT: --> (16 * %val) U: [0,-15) S: [-2147483648,2147483633) |
| ; CHECK-NEXT: %tmp2 = lshr i32 %tmp1, 6 |
| ; CHECK-NEXT: --> ((16 * %val) /u 64) U: [0,67108864) S: [0,67108864) |
| ; CHECK-NEXT: Determining loop execution counts for: @shifty_biggerLshr_shlnuw |
| ; |
| %tmp1 = shl nuw i32 %val, 4 |
| %tmp2 = lshr i32 %tmp1, 6 |
| ret i32 %tmp2 |
| } |
| |
| ; Or, further folded into mask variant. |
| |
| define i32 @masky_biggerShl(i32 %val) { |
| ; CHECK-LABEL: 'masky_biggerShl' |
| ; CHECK-NEXT: Classifying expressions for: @masky_biggerShl |
| ; CHECK-NEXT: %tmp1 = shl i32 %val, 2 |
| ; CHECK-NEXT: --> (4 * %val) U: [0,-3) S: [-2147483648,2147483645) |
| ; CHECK-NEXT: %tmp2 = and i32 %tmp1, 268435452 |
| ; CHECK-NEXT: --> (4 * (zext i26 (trunc i32 %val to i26) to i32))<nuw><nsw> U: [0,268435453) S: [0,268435453) |
| ; CHECK-NEXT: Determining loop execution counts for: @masky_biggerShl |
| ; |
| %tmp1 = shl i32 %val, 2 |
| %tmp2 = and i32 %tmp1, 268435452 |
| ret i32 %tmp2 |
| } |
| |
| define i32 @masky_biggerShl_shlnuw(i32 %val) { |
| ; CHECK-LABEL: 'masky_biggerShl_shlnuw' |
| ; CHECK-NEXT: Classifying expressions for: @masky_biggerShl_shlnuw |
| ; CHECK-NEXT: %tmp1 = shl nuw i32 %val, 2 |
| ; CHECK-NEXT: --> (4 * %val) U: [0,-3) S: [-2147483648,2147483645) |
| ; CHECK-NEXT: Determining loop execution counts for: @masky_biggerShl_shlnuw |
| ; |
| %tmp1 = shl nuw i32 %val, 2 |
| ret i32 %tmp1 |
| } |
| |
| define i32 @masky_biggerLshr(i32 %val) { |
| ; CHECK-LABEL: 'masky_biggerLshr' |
| ; CHECK-NEXT: Classifying expressions for: @masky_biggerLshr |
| ; CHECK-NEXT: %tmp1 = lshr i32 %val, 2 |
| ; CHECK-NEXT: --> (%val /u 4) U: [0,1073741824) S: [0,1073741824) |
| ; CHECK-NEXT: %tmp2 = and i32 %tmp1, 67108863 |
| ; CHECK-NEXT: --> (zext i26 (trunc i32 (%val /u 4) to i26) to i32) U: [0,67108864) S: [0,67108864) |
| ; CHECK-NEXT: Determining loop execution counts for: @masky_biggerLshr |
| ; |
| %tmp1 = lshr i32 %val, 2 |
| %tmp2 = and i32 %tmp1, 67108863 |
| ret i32 %tmp2 |
| } |
| |
| define i32 @masky_biggerLshr_shlnuw(i32 %val) { |
| ; CHECK-LABEL: 'masky_biggerLshr_shlnuw' |
| ; CHECK-NEXT: Classifying expressions for: @masky_biggerLshr_shlnuw |
| ; CHECK-NEXT: %tmp1 = lshr i32 %val, 2 |
| ; CHECK-NEXT: --> (%val /u 4) U: [0,1073741824) S: [0,1073741824) |
| ; CHECK-NEXT: Determining loop execution counts for: @masky_biggerLshr_shlnuw |
| ; |
| %tmp1 = lshr i32 %val, 2 |
| ret i32 %tmp1 |
| } |