[SCEV] Simplify umin/max of zext and sext of the same value

This is a common idiom which arises after induction variables are widened, and we have two or more exit conditions.  Interestingly, we don't have instcombine or instsimplify support for this either.

Differential Revision: https://reviews.llvm.org/D69006

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375349 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 8d4c7c5a55f166ef4fc700911fd751f38f841c28..4d3c78c816e1a98b2ec875a0b8737b0fd81c7861 100644 (file)
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -10338,10 +10338,43 @@ bool ScalarEvolution::isImpliedViaOperations(ICmpInst::Predicate Pred,
   return false;
 }
 
+static bool isKnownPredicateExtendIdiom(ICmpInst::Predicate Pred,
+                                        const SCEV *LHS, const SCEV *RHS) {
+  // zext x u<= sext x, sext x s<= zext x
+  switch (Pred) {
+  case ICmpInst::ICMP_SGE:
+    std::swap(LHS, RHS);
+    LLVM_FALLTHROUGH;
+  case ICmpInst::ICMP_SLE: {
+    // If operand >=s 0 then ZExt == SExt.  If operand <s 0 then SExt <s ZExt.
+    const SCEVSignExtendExpr *SExt = dyn_cast<SCEVSignExtendExpr>(LHS);
+    const SCEVZeroExtendExpr *ZExt = dyn_cast<SCEVZeroExtendExpr>(RHS);
+    if (SExt && ZExt && SExt->getOperand() == ZExt->getOperand())
+      return true;
+    break;
+  }
+  case ICmpInst::ICMP_UGE:
+    std::swap(LHS, RHS);
+    LLVM_FALLTHROUGH;
+  case ICmpInst::ICMP_ULE: { 
+    // If operand >=s 0 then ZExt == SExt.  If operand <s 0 then ZExt <u SExt.
+    const SCEVZeroExtendExpr *ZExt = dyn_cast<SCEVZeroExtendExpr>(LHS);
+    const SCEVSignExtendExpr *SExt = dyn_cast<SCEVSignExtendExpr>(RHS);
+    if (SExt && ZExt && SExt->getOperand() == ZExt->getOperand())
+      return true;
+    break;
+  }
+  default:
+    break;
+  };
+  return false;
+}
+
 bool
 ScalarEvolution::isKnownViaNonRecursiveReasoning(ICmpInst::Predicate Pred,
                                            const SCEV *LHS, const SCEV *RHS) {
-  return isKnownPredicateViaConstantRanges(Pred, LHS, RHS) ||
+  return isKnownPredicateExtendIdiom(Pred, LHS, RHS) ||
+         isKnownPredicateViaConstantRanges(Pred, LHS, RHS) ||
          IsKnownPredicateViaMinOrMax(*this, Pred, LHS, RHS) ||
          IsKnownPredicateViaAddRecStart(*this, Pred, LHS, RHS) ||
          isKnownPredicateViaNoOverflow(Pred, LHS, RHS);

diff --git a/test/Analysis/ScalarEvolution/max-trip-count-address-space.ll b/test/Analysis/ScalarEvolution/max-trip-count-address-space.ll
index 1c72440a7492cd37ea93098f04ddac54db11f173..5260fe90e6b7d3f8abb7d3a9eaf9f4cb7b517577 100644 (file)
--- a/test/Analysis/ScalarEvolution/max-trip-count-address-space.ll
+++ b/test/Analysis/ScalarEvolution/max-trip-count-address-space.ll
@@ -65,4 +65,4 @@ for.end:                                          ; preds = %for.cond.for.end_cr
 
 ; CHECK: Determining loop execution counts for: @test
 ; CHECK-NEXT: backedge-taken count is
-; CHECK-NEXT: max backedge-taken count is -1
+; CHECK-NEXT: max backedge-taken count is 4294967294

diff --git a/test/Analysis/ScalarEvolution/max-trip-count.ll b/test/Analysis/ScalarEvolution/max-trip-count.ll
index 53b882bdcbfe66e559a02ca24e52c0b851ba51b7..e3ba313a690b83b96bfe54e92dacf652c4356411 100644 (file)
--- a/test/Analysis/ScalarEvolution/max-trip-count.ll
+++ b/test/Analysis/ScalarEvolution/max-trip-count.ll
@@ -97,7 +97,7 @@ for.end:                                          ; preds = %for.cond.for.end_cr
 
 ; CHECK: Determining loop execution counts for: @test
 ; CHECK-NEXT: backedge-taken count is
-; CHECK-NEXT: max backedge-taken count is -1
+; CHECK-NEXT: max backedge-taken count is 4294967294
 
 ; PR19799: Indvars miscompile due to an incorrect max backedge taken count from SCEV.
 ; CHECK-LABEL: @pr19799

diff --git a/test/Analysis/ScalarEvolution/sext-mul.ll b/test/Analysis/ScalarEvolution/sext-mul.ll
index 42810be6ed77c64a21741f48943153cec03ae4d2..4a10749819712ccdff60decba24a81ec6356c274 100644 (file)
--- a/test/Analysis/ScalarEvolution/sext-mul.ll
+++ b/test/Analysis/ScalarEvolution/sext-mul.ll
@@ -11,7 +11,7 @@
 ; CHECK: %tmp15 = getelementptr inbounds i32, i32* %arg, i64 %tmp14
 ; CHECK-NEXT: --> {{.*}} Exits: (4 + (4 * (sext i32 (-2 + (2 * %arg2)) to i64))<nsw> + %arg)
 ; CHECK:Loop %bb7: backedge-taken count is (-1 + (zext i32 %arg2 to i64))<nsw>
-; CHECK-NEXT:Loop %bb7: max backedge-taken count is -1
+; CHECK-NEXT:Loop %bb7: max backedge-taken count is 4294967294
 ; CHECK-NEXT:Loop %bb7: Predicated backedge-taken count is (-1 + (zext i32 %arg2 to i64))<nsw>
 
 define void @foo(i32* nocapture %arg, i32 %arg1, i32 %arg2) {
@@ -52,7 +52,7 @@ bb7:                                              ; preds = %bb7, %bb3
 ; CHECK: %t14 = or i128 %t10, 1
 ; CHECK-NEXT: --> {{.*}} Exits: (1 + (sext i127 (-633825300114114700748351602688 + (633825300114114700748351602688 * (zext i32 %arg5 to i127))) to i128))<nuw><nsw>
 ; CHECK: Loop %bb7: backedge-taken count is (-1 + (zext i32 %arg5 to i128))<nsw>
-; CHECK-NEXT: Loop %bb7: max backedge-taken count is -1
+; CHECK-NEXT: Loop %bb7: max backedge-taken count is 4294967294
 ; CHECK-NEXT: Loop %bb7: Predicated backedge-taken count is (-1 + (zext i32 %arg5 to i128))<nsw>
 
 define void @goo(i32* nocapture %arg3, i32 %arg4, i32 %arg5) {

diff --git a/test/Analysis/ScalarEvolution/umin-umax-folds.ll b/test/Analysis/ScalarEvolution/umin-umax-folds.ll
index 7637ae92116f25f8f2b23ccd3b7c5c383f353408..fb8f59fe42520a5a984312d610d2bb870eac9b91 100644 (file)
--- a/test/Analysis/ScalarEvolution/umin-umax-folds.ll
+++ b/test/Analysis/ScalarEvolution/umin-umax-folds.ll
@@ -9,15 +9,15 @@ define void @umin_sext_x_zext_x(i32 %len) {
 ; CHECK-NEXT:    %len.sext = sext i32 %len to i64
 ; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648)
 ; CHECK-NEXT:    %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
-; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: ((zext i32 %len to i64) umin (sext i32 %len to i64)) LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: (zext i32 %len to i64) LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %iv.next = add i64 %iv, 1
-; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + ((zext i32 %len to i64) umin (sext i32 %len to i64)))<nuw><nsw> LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + (zext i32 %len to i64))<nuw><nsw> LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %and = and i1 %cmp1, %cmp2
 ; CHECK-NEXT:    --> %and U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
 ; CHECK-NEXT:  Determining loop execution counts for: @umin_sext_x_zext_x
-; CHECK-NEXT:  Loop %loop: backedge-taken count is ((zext i32 %len to i64) umin (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:  Loop %loop: max backedge-taken count is 4294967295
-; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is ((zext i32 %len to i64) umin (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:   Predicates:
 ; CHECK:       Loop %loop: Trip multiple is 1
 ;
@@ -44,15 +44,15 @@ define void @ule_sext_x_zext_x(i32 %len) {
 ; CHECK-NEXT:    %len.sext = sext i32 %len to i64
 ; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648)
 ; CHECK-NEXT:    %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
-; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: ((zext i32 %len to i64) umin (sext i32 %len to i64)) LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: (zext i32 %len to i64) LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %iv.next = add i64 %iv, 1
-; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + ((zext i32 %len to i64) umin (sext i32 %len to i64)))<nuw><nsw> LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + (zext i32 %len to i64))<nuw><nsw> LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %sel = select i1 %cmp1, i64 %len.zext, i64 %len.sext
-; CHECK-NEXT:    --> ((zext i32 %len to i64) umin (sext i32 %len to i64)) U: [0,4294967296) S: [0,4294967296) Exits: ((zext i32 %len to i64) umin (sext i32 %len to i64)) LoopDispositions: { %loop: Invariant }
+; CHECK-NEXT:    --> (zext i32 %len to i64) U: [0,4294967296) S: [0,4294967296) Exits: (zext i32 %len to i64) LoopDispositions: { %loop: Invariant }
 ; CHECK-NEXT:  Determining loop execution counts for: @ule_sext_x_zext_x
-; CHECK-NEXT:  Loop %loop: backedge-taken count is ((zext i32 %len to i64) umin (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:  Loop %loop: max backedge-taken count is 4294967295
-; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is ((zext i32 %len to i64) umin (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:   Predicates:
 ; CHECK:       Loop %loop: Trip multiple is 1
 ;
@@ -79,15 +79,15 @@ define void @uge_sext_x_zext_x(i32 %len) {
 ; CHECK-NEXT:    %len.sext = sext i32 %len to i64
 ; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648)
 ; CHECK-NEXT:    %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
-; CHECK-NEXT:    --> {0,+,1}<%loop> U: full-set S: full-set Exits: ((zext i32 %len to i64) umax (sext i32 %len to i64)) LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {0,+,1}<%loop> U: full-set S: full-set Exits: (sext i32 %len to i64) LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %iv.next = add i64 %iv, 1
-; CHECK-NEXT:    --> {1,+,1}<%loop> U: full-set S: full-set Exits: (1 + ((zext i32 %len to i64) umax (sext i32 %len to i64))) LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {1,+,1}<%loop> U: full-set S: full-set Exits: (1 + (sext i32 %len to i64))<nsw> LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %sel = select i1 %cmp1, i64 %len.zext, i64 %len.sext
-; CHECK-NEXT:    --> ((zext i32 %len to i64) umax (sext i32 %len to i64)) U: full-set S: full-set Exits: ((zext i32 %len to i64) umax (sext i32 %len to i64)) LoopDispositions: { %loop: Invariant }
+; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648) Exits: (sext i32 %len to i64) LoopDispositions: { %loop: Invariant }
 ; CHECK-NEXT:  Determining loop execution counts for: @uge_sext_x_zext_x
-; CHECK-NEXT:  Loop %loop: backedge-taken count is ((zext i32 %len to i64) umax (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: backedge-taken count is (sext i32 %len to i64)
 ; CHECK-NEXT:  Loop %loop: max backedge-taken count is -1
-; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is ((zext i32 %len to i64) umax (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is (sext i32 %len to i64)
 ; CHECK-NEXT:   Predicates:
 ; CHECK:       Loop %loop: Trip multiple is 1
 ;
@@ -114,15 +114,15 @@ define void @ult_sext_x_zext_x(i32 %len) {
 ; CHECK-NEXT:    %len.sext = sext i32 %len to i64
 ; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648)
 ; CHECK-NEXT:    %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
-; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: ((zext i32 %len to i64) umin (sext i32 %len to i64)) LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: (zext i32 %len to i64) LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %iv.next = add i64 %iv, 1
-; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + ((zext i32 %len to i64) umin (sext i32 %len to i64)))<nuw><nsw> LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + (zext i32 %len to i64))<nuw><nsw> LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %umin = select i1 %cmp1, i64 %len.zext, i64 %len.sext
-; CHECK-NEXT:    --> ((zext i32 %len to i64) umin (sext i32 %len to i64)) U: [0,4294967296) S: [0,4294967296) Exits: ((zext i32 %len to i64) umin (sext i32 %len to i64)) LoopDispositions: { %loop: Invariant }
+; CHECK-NEXT:    --> (zext i32 %len to i64) U: [0,4294967296) S: [0,4294967296) Exits: (zext i32 %len to i64) LoopDispositions: { %loop: Invariant }
 ; CHECK-NEXT:  Determining loop execution counts for: @ult_sext_x_zext_x
-; CHECK-NEXT:  Loop %loop: backedge-taken count is ((zext i32 %len to i64) umin (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:  Loop %loop: max backedge-taken count is 4294967295
-; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is ((zext i32 %len to i64) umin (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:   Predicates:
 ; CHECK:       Loop %loop: Trip multiple is 1
 ;
@@ -149,15 +149,15 @@ define void @ugt_sext_x_zext_x(i32 %len) {
 ; CHECK-NEXT:    %len.sext = sext i32 %len to i64
 ; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648)
 ; CHECK-NEXT:    %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
-; CHECK-NEXT:    --> {0,+,1}<%loop> U: full-set S: full-set Exits: ((zext i32 %len to i64) umax (sext i32 %len to i64)) LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {0,+,1}<%loop> U: full-set S: full-set Exits: (sext i32 %len to i64) LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %iv.next = add i64 %iv, 1
-; CHECK-NEXT:    --> {1,+,1}<%loop> U: full-set S: full-set Exits: (1 + ((zext i32 %len to i64) umax (sext i32 %len to i64))) LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {1,+,1}<%loop> U: full-set S: full-set Exits: (1 + (sext i32 %len to i64))<nsw> LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %umax = select i1 %cmp1, i64 %len.zext, i64 %len.sext
-; CHECK-NEXT:    --> ((zext i32 %len to i64) umax (sext i32 %len to i64)) U: full-set S: full-set Exits: ((zext i32 %len to i64) umax (sext i32 %len to i64)) LoopDispositions: { %loop: Invariant }
+; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648) Exits: (sext i32 %len to i64) LoopDispositions: { %loop: Invariant }
 ; CHECK-NEXT:  Determining loop execution counts for: @ugt_sext_x_zext_x
-; CHECK-NEXT:  Loop %loop: backedge-taken count is ((zext i32 %len to i64) umax (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: backedge-taken count is (sext i32 %len to i64)
 ; CHECK-NEXT:  Loop %loop: max backedge-taken count is -1
-; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is ((zext i32 %len to i64) umax (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is (sext i32 %len to i64)
 ; CHECK-NEXT:   Predicates:
 ; CHECK:       Loop %loop: Trip multiple is 1
 ;
@@ -184,15 +184,15 @@ define void @sle_sext_x_zext_x(i32 %len) {
 ; CHECK-NEXT:    %len.sext = sext i32 %len to i64
 ; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648)
 ; CHECK-NEXT:    %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
-; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: ((zext i32 %len to i64) umin (sext i32 %len to i64)) LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: (zext i32 %len to i64) LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %iv.next = add i64 %iv, 1
-; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + ((zext i32 %len to i64) umin (sext i32 %len to i64)))<nuw><nsw> LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + (zext i32 %len to i64))<nuw><nsw> LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %sel = select i1 %cmp1, i64 %len.zext, i64 %len.sext
-; CHECK-NEXT:    --> ((zext i32 %len to i64) umin (sext i32 %len to i64)) U: [0,4294967296) S: [0,4294967296) Exits: ((zext i32 %len to i64) umin (sext i32 %len to i64)) LoopDispositions: { %loop: Invariant }
+; CHECK-NEXT:    --> (zext i32 %len to i64) U: [0,4294967296) S: [0,4294967296) Exits: (zext i32 %len to i64) LoopDispositions: { %loop: Invariant }
 ; CHECK-NEXT:  Determining loop execution counts for: @sle_sext_x_zext_x
-; CHECK-NEXT:  Loop %loop: backedge-taken count is ((zext i32 %len to i64) umin (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:  Loop %loop: max backedge-taken count is 4294967295
-; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is ((zext i32 %len to i64) umin (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:   Predicates:
 ; CHECK:       Loop %loop: Trip multiple is 1
 ;
@@ -219,15 +219,15 @@ define void @sge_sext_x_zext_x(i32 %len) {
 ; CHECK-NEXT:    %len.sext = sext i32 %len to i64
 ; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648)
 ; CHECK-NEXT:    %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
-; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: ((zext i32 %len to i64) smax (sext i32 %len to i64)) LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: (zext i32 %len to i64) LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %iv.next = add i64 %iv, 1
-; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + ((zext i32 %len to i64) smax (sext i32 %len to i64)))<nuw><nsw> LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + (zext i32 %len to i64))<nuw><nsw> LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %sel = select i1 %cmp1, i64 %len.zext, i64 %len.sext
-; CHECK-NEXT:    --> ((zext i32 %len to i64) smax (sext i32 %len to i64)) U: [0,4294967296) S: [0,4294967296) Exits: ((zext i32 %len to i64) smax (sext i32 %len to i64)) LoopDispositions: { %loop: Invariant }
+; CHECK-NEXT:    --> (zext i32 %len to i64) U: [0,4294967296) S: [0,4294967296) Exits: (zext i32 %len to i64) LoopDispositions: { %loop: Invariant }
 ; CHECK-NEXT:  Determining loop execution counts for: @sge_sext_x_zext_x
-; CHECK-NEXT:  Loop %loop: backedge-taken count is ((zext i32 %len to i64) smax (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:  Loop %loop: max backedge-taken count is 4294967295
-; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is ((zext i32 %len to i64) smax (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:   Predicates:
 ; CHECK:       Loop %loop: Trip multiple is 1
 ;
@@ -254,15 +254,15 @@ define void @slt_sext_x_zext_x(i32 %len) {
 ; CHECK-NEXT:    %len.sext = sext i32 %len to i64
 ; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648)
 ; CHECK-NEXT:    %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
-; CHECK-NEXT:    --> {0,+,1}<%loop> U: full-set S: full-set Exits: ((zext i32 %len to i64) smin (sext i32 %len to i64)) LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {0,+,1}<%loop> U: full-set S: full-set Exits: (sext i32 %len to i64) LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %iv.next = add i64 %iv, 1
-; CHECK-NEXT:    --> {1,+,1}<%loop> U: full-set S: full-set Exits: (1 + ((zext i32 %len to i64) smin (sext i32 %len to i64)))<nsw> LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {1,+,1}<%loop> U: full-set S: full-set Exits: (1 + (sext i32 %len to i64))<nsw> LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %umin = select i1 %cmp1, i64 %len.zext, i64 %len.sext
-; CHECK-NEXT:    --> ((zext i32 %len to i64) smin (sext i32 %len to i64)) U: [-2147483648,2147483648) S: [-2147483648,2147483648) Exits: ((zext i32 %len to i64) smin (sext i32 %len to i64)) LoopDispositions: { %loop: Invariant }
+; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648) Exits: (sext i32 %len to i64) LoopDispositions: { %loop: Invariant }
 ; CHECK-NEXT:  Determining loop execution counts for: @slt_sext_x_zext_x
-; CHECK-NEXT:  Loop %loop: backedge-taken count is ((zext i32 %len to i64) smin (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: backedge-taken count is (sext i32 %len to i64)
 ; CHECK-NEXT:  Loop %loop: max backedge-taken count is -1
-; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is ((zext i32 %len to i64) smin (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is (sext i32 %len to i64)
 ; CHECK-NEXT:   Predicates:
 ; CHECK:       Loop %loop: Trip multiple is 1
 ;
@@ -289,15 +289,15 @@ define void @sgt_sext_x_zext_x(i32 %len) {
 ; CHECK-NEXT:    %len.sext = sext i32 %len to i64
 ; CHECK-NEXT:    --> (sext i32 %len to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648)
 ; CHECK-NEXT:    %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
-; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: ((zext i32 %len to i64) smax (sext i32 %len to i64)) LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,4294967296) S: [0,4294967296) Exits: (zext i32 %len to i64) LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %iv.next = add i64 %iv, 1
-; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + ((zext i32 %len to i64) smax (sext i32 %len to i64)))<nuw><nsw> LoopDispositions: { %loop: Computable }
+; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,4294967297) S: [1,4294967297) Exits: (1 + (zext i32 %len to i64))<nuw><nsw> LoopDispositions: { %loop: Computable }
 ; CHECK-NEXT:    %umax = select i1 %cmp1, i64 %len.zext, i64 %len.sext
-; CHECK-NEXT:    --> ((zext i32 %len to i64) smax (sext i32 %len to i64)) U: [0,4294967296) S: [0,4294967296) Exits: ((zext i32 %len to i64) smax (sext i32 %len to i64)) LoopDispositions: { %loop: Invariant }
+; CHECK-NEXT:    --> (zext i32 %len to i64) U: [0,4294967296) S: [0,4294967296) Exits: (zext i32 %len to i64) LoopDispositions: { %loop: Invariant }
 ; CHECK-NEXT:  Determining loop execution counts for: @sgt_sext_x_zext_x
-; CHECK-NEXT:  Loop %loop: backedge-taken count is ((zext i32 %len to i64) smax (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:  Loop %loop: max backedge-taken count is 4294967295
-; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is ((zext i32 %len to i64) smax (sext i32 %len to i64))
+; CHECK-NEXT:  Loop %loop: Predicated backedge-taken count is (zext i32 %len to i64)
 ; CHECK-NEXT:   Predicates:
 ; CHECK:       Loop %loop: Trip multiple is 1
 ;