forked from OSchip/llvm-project
[NFC][SCEV] Add some tests for select->umax recognition
Apparently we didn't have any tests for that codepath?
This commit is contained in:
Roman Lebedev
parent
f810b40c3b
commit
93c93fd08f
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@ -1,3 +1,4 @@
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; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
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; RUN: opt "-passes=print<scalar-evolution>" -disable-output < %s 2>&1 | FileCheck %s
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;
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; This checks if the min and max expressions are properly recognized by
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@ -16,6 +17,41 @@
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define void @f(i32* %A, i32 %N) {
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; CHECK-LABEL: 'f'
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; CHECK-NEXT: Classifying expressions for: @f
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; CHECK-NEXT: %i.0 = phi i32 [ 0, %bb ], [ %tmp23, %bb2 ]
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%bb1> U: [0,-2147483648) S: [0,-2147483648) Exits: (0 smax %N) LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %i.0.1 = sext i32 %i.0 to i64
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%bb1> U: [0,2147483648) S: [0,2147483648) Exits: (zext i32 (0 smax %N) to i64) LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %tmp3 = add nuw nsw i32 %i.0, 3
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; CHECK-NEXT: --> {3,+,1}<nuw><%bb1> U: [3,-2147483645) S: [3,-2147483645) Exits: (3 + (0 smax %N))<nuw> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %tmp5 = sext i32 %tmp3 to i64
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; CHECK-NEXT: --> (sext i32 {3,+,1}<nuw><%bb1> to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648) Exits: (sext i32 (3 + (0 smax %N))<nuw> to i64) LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %tmp6 = sext i32 %N to i64
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; CHECK-NEXT: --> (sext i32 %N to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648) Exits: (sext i32 %N to i64) LoopDispositions: { %bb1: Invariant }
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; CHECK-NEXT: %tmp9 = select i1 %tmp4, i64 %tmp5, i64 %tmp6
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; CHECK-NEXT: --> ((sext i32 {3,+,1}<nuw><%bb1> to i64) smin (sext i32 %N to i64)) U: [-2147483648,2147483648) S: [-2147483648,2147483648) Exits: ((sext i32 (3 + (0 smax %N))<nuw> to i64) smin (sext i32 %N to i64)) LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %tmp11 = getelementptr inbounds i32, i32* %A, i64 %tmp9
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; CHECK-NEXT: --> ((4 * ((sext i32 {3,+,1}<nuw><%bb1> to i64) smin (sext i32 %N to i64)))<nsw> + %A) U: full-set S: full-set Exits: ((4 * ((sext i32 (3 + (0 smax %N))<nuw> to i64) smin (sext i32 %N to i64)))<nsw> + %A) LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %tmp12 = load i32, i32* %tmp11, align 4
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; CHECK-NEXT: --> %tmp12 U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %bb1: Variant }
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; CHECK-NEXT: %tmp13 = shl nsw i32 %tmp12, 1
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; CHECK-NEXT: --> (2 * %tmp12) U: [0,-1) S: [-2147483648,2147483647) Exits: <<Unknown>> LoopDispositions: { %bb1: Variant }
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; CHECK-NEXT: %tmp17 = add nsw i64 %i.0.1, -3
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; CHECK-NEXT: --> {-3,+,1}<nsw><%bb1> U: [-3,2147483645) S: [-3,2147483645) Exits: (-3 + (zext i32 (0 smax %N) to i64))<nsw> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %tmp19 = select i1 %tmp14, i64 0, i64 %tmp17
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; CHECK-NEXT: --> (-3 + (3 smax {0,+,1}<nuw><nsw><%bb1>))<nsw> U: [0,2147483645) S: [0,2147483645) Exits: (-3 + (3 smax (zext i32 (0 smax %N) to i64)))<nsw> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %tmp21 = getelementptr inbounds i32, i32* %A, i64 %tmp19
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; CHECK-NEXT: --> (-12 + (4 * (3 smax {0,+,1}<nuw><nsw><%bb1>))<nuw><nsw> + %A) U: full-set S: full-set Exits: (-12 + (4 * (3 smax (zext i32 (0 smax %N) to i64)))<nuw><nsw> + %A) LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %tmp23 = add nuw nsw i32 %i.0, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><%bb1> U: [1,-2147483647) S: [1,-2147483647) Exits: (1 + (0 smax %N))<nuw> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @f
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; CHECK-NEXT: Loop %bb1: backedge-taken count is (0 smax %N)
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; CHECK-NEXT: Loop %bb1: max backedge-taken count is 2147483647
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; CHECK-NEXT: Loop %bb1: Predicated backedge-taken count is (0 smax %N)
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; CHECK-NEXT: Predicates:
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; CHECK: Loop %bb1: Trip multiple is 1
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;
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bb:
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br label %bb1
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@ -32,8 +68,6 @@ bb2: ; preds = %bb1
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%tmp6 = sext i32 %N to i64
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%tmp9 = select i1 %tmp4, i64 %tmp5, i64 %tmp6
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; min(N, i+3)
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; CHECK: select i1 %tmp4, i64 %tmp5, i64 %tmp6
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; CHECK-NEXT: --> ((sext i32 {3,+,1}<nuw><%bb1> to i64) smin (sext i32 %N to i64))
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%tmp11 = getelementptr inbounds i32, i32* %A, i64 %tmp9
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%tmp12 = load i32, i32* %tmp11, align 4
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%tmp13 = shl nsw i32 %tmp12, 1
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@ -41,8 +75,6 @@ bb2: ; preds = %bb1
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%tmp17 = add nsw i64 %i.0.1, -3
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%tmp19 = select i1 %tmp14, i64 0, i64 %tmp17
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; max(0, i - 3)
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; CHECK: select i1 %tmp14, i64 0, i64 %tmp17
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; CHECK-NEXT: --> (-3 + (3 smax {0,+,1}<nuw><nsw><%bb1>))
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%tmp21 = getelementptr inbounds i32, i32* %A, i64 %tmp19
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store i32 %tmp13, i32* %tmp21, align 4
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%tmp23 = add nuw nsw i32 %i.0, 1
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@ -51,3 +83,133 @@ bb2: ; preds = %bb1
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bb24: ; preds = %bb1
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ret void
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}
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define i8 @umax_basic_eq_off1(i8 %x, i8 %y) {
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; CHECK-LABEL: 'umax_basic_eq_off1'
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; CHECK-NEXT: Classifying expressions for: @umax_basic_eq_off1
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; CHECK-NEXT: %lhs = add i8 %y, 1
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; CHECK-NEXT: --> (1 + %y) U: full-set S: full-set
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; CHECK-NEXT: %rhs = add i8 %x, %y
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; CHECK-NEXT: --> (%x + %y) U: full-set S: full-set
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; CHECK-NEXT: %r = select i1 %x.is.zero, i8 %lhs, i8 %rhs
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; CHECK-NEXT: --> ((1 umax %x) + %y) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @umax_basic_eq_off1
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;
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%x.is.zero = icmp eq i8 %x, 0
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%lhs = add i8 %y, 1
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%rhs = add i8 %x, %y
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%r = select i1 %x.is.zero, i8 %lhs, i8 %rhs
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ret i8 %r
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}
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define i8 @umax_basic_ne_off1(i8 %x, i8 %y) {
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; CHECK-LABEL: 'umax_basic_ne_off1'
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; CHECK-NEXT: Classifying expressions for: @umax_basic_ne_off1
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; CHECK-NEXT: %lhs = add i8 %y, 1
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; CHECK-NEXT: --> (1 + %y) U: full-set S: full-set
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; CHECK-NEXT: %rhs = add i8 %x, %y
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; CHECK-NEXT: --> (%x + %y) U: full-set S: full-set
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; CHECK-NEXT: %r = select i1 %x.is.zero, i8 %rhs, i8 %lhs
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; CHECK-NEXT: --> ((1 umax %x) + %y) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @umax_basic_ne_off1
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;
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%x.is.zero = icmp ne i8 %x, 0
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%lhs = add i8 %y, 1
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%rhs = add i8 %x, %y
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%r = select i1 %x.is.zero, i8 %rhs, i8 %lhs
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ret i8 %r
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}
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define i8 @umax_basic_eq_off0(i8 %x, i8 %y) {
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; CHECK-LABEL: 'umax_basic_eq_off0'
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; CHECK-NEXT: Classifying expressions for: @umax_basic_eq_off0
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; CHECK-NEXT: %lhs = add i8 %y, 0
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; CHECK-NEXT: --> %y U: full-set S: full-set
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; CHECK-NEXT: %rhs = add i8 %x, %y
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; CHECK-NEXT: --> (%x + %y) U: full-set S: full-set
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; CHECK-NEXT: %r = select i1 %x.is.zero, i8 %lhs, i8 %rhs
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; CHECK-NEXT: --> %r U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @umax_basic_eq_off0
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;
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%x.is.zero = icmp eq i8 %x, 0
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%lhs = add i8 %y, 0
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%rhs = add i8 %x, %y
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%r = select i1 %x.is.zero, i8 %lhs, i8 %rhs
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ret i8 %r
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}
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define i8 @umax_basic_eq_off2(i8 %x, i8 %y) {
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; CHECK-LABEL: 'umax_basic_eq_off2'
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; CHECK-NEXT: Classifying expressions for: @umax_basic_eq_off2
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; CHECK-NEXT: %lhs = add i8 %y, 2
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; CHECK-NEXT: --> (2 + %y) U: full-set S: full-set
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; CHECK-NEXT: %rhs = add i8 %x, %y
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; CHECK-NEXT: --> (%x + %y) U: full-set S: full-set
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; CHECK-NEXT: %r = select i1 %x.is.zero, i8 %lhs, i8 %rhs
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; CHECK-NEXT: --> %r U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @umax_basic_eq_off2
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;
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%x.is.zero = icmp eq i8 %x, 0
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%lhs = add i8 %y, 2
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%rhs = add i8 %x, %y
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%r = select i1 %x.is.zero, i8 %lhs, i8 %rhs
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ret i8 %r
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}
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define i8 @umax_basic_eq_var_off(i8 %x, i8 %y, i8 %c) {
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; CHECK-LABEL: 'umax_basic_eq_var_off'
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; CHECK-NEXT: Classifying expressions for: @umax_basic_eq_var_off
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; CHECK-NEXT: %lhs = add i8 %y, %c
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; CHECK-NEXT: --> (%y + %c) U: full-set S: full-set
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; CHECK-NEXT: %rhs = add i8 %x, %y
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; CHECK-NEXT: --> (%x + %y) U: full-set S: full-set
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; CHECK-NEXT: %r = select i1 %x.is.zero, i8 %lhs, i8 %rhs
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; CHECK-NEXT: --> %r U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @umax_basic_eq_var_off
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;
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%x.is.zero = icmp eq i8 %x, 0
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%lhs = add i8 %y, %c
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%rhs = add i8 %x, %y
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%r = select i1 %x.is.zero, i8 %lhs, i8 %rhs
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ret i8 %r
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}
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define i8 @umax_basic_eq_narrow(i4 %x.narrow, i8 %y) {
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; CHECK-LABEL: 'umax_basic_eq_narrow'
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; CHECK-NEXT: Classifying expressions for: @umax_basic_eq_narrow
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; CHECK-NEXT: %x = zext i4 %x.narrow to i8
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; CHECK-NEXT: --> (zext i4 %x.narrow to i8) U: [0,16) S: [0,16)
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; CHECK-NEXT: %lhs = add i8 %y, 1
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; CHECK-NEXT: --> (1 + %y) U: full-set S: full-set
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; CHECK-NEXT: %rhs = add i8 %x, %y
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; CHECK-NEXT: --> ((zext i4 %x.narrow to i8) + %y) U: full-set S: full-set
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; CHECK-NEXT: %r = select i1 %x.is.zero, i8 %lhs, i8 %rhs
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; CHECK-NEXT: --> ((1 umax (zext i4 %x.narrow to i8)) + %y) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @umax_basic_eq_narrow
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;
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%x = zext i4 %x.narrow to i8
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%x.is.zero = icmp eq i4 %x.narrow, 0
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%lhs = add i8 %y, 1
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%rhs = add i8 %x, %y
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%r = select i1 %x.is.zero, i8 %lhs, i8 %rhs
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ret i8 %r
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}
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define i8 @umax_basic_ne_narrow(i4 %x.narrow, i8 %y) {
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; CHECK-LABEL: 'umax_basic_ne_narrow'
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; CHECK-NEXT: Classifying expressions for: @umax_basic_ne_narrow
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; CHECK-NEXT: %x = zext i4 %x.narrow to i8
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; CHECK-NEXT: --> (zext i4 %x.narrow to i8) U: [0,16) S: [0,16)
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; CHECK-NEXT: %lhs = add i8 %y, 1
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; CHECK-NEXT: --> (1 + %y) U: full-set S: full-set
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; CHECK-NEXT: %rhs = add i8 %x, %y
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; CHECK-NEXT: --> ((zext i4 %x.narrow to i8) + %y) U: full-set S: full-set
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; CHECK-NEXT: %r = select i1 %x.is.zero, i8 %rhs, i8 %lhs
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; CHECK-NEXT: --> ((1 umax (zext i4 %x.narrow to i8)) + %y) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @umax_basic_ne_narrow
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;
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%x = zext i4 %x.narrow to i8
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%x.is.zero = icmp ne i4 %x.narrow, 0
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%lhs = add i8 %y, 1
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%rhs = add i8 %x, %y
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%r = select i1 %x.is.zero, i8 %rhs, i8 %lhs
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ret i8 %r
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}
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