| ; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s |
| |
| ; ScalarEvolution should be able to understand the loop and eliminate the casts. |
| |
| target datalayout = "e-p:32:32:32-p1:16:16:16-p2:8:8:8-p4:64:64:64-n16:32:64" |
| |
| ; CHECK: {%d,+,4}<%bb>{{ U: [^ ]+ S: [^ ]+}}{{ *}} Exits: (-4 + (4 * (trunc i32 %n to i16)) + %d) |
| |
| |
| define void @foo(i32 addrspace(1)* nocapture %d, i32 %n) nounwind { |
| ; CHECK: @foo |
| entry: |
| %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1] |
| br i1 %0, label %bb.nph, label %return |
| |
| bb.nph: ; preds = %entry |
| br label %bb |
| |
| bb: ; preds = %bb1, %bb.nph |
| %i.02 = phi i32 [ %5, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=2] |
| %p.01 = phi i8 [ %4, %bb1 ], [ -1, %bb.nph ] ; <i8> [#uses=2] |
| %1 = sext i8 %p.01 to i32 ; <i32> [#uses=1] |
| %2 = sext i32 %i.02 to i64 ; <i64> [#uses=1] |
| %3 = getelementptr i32, i32 addrspace(1)* %d, i64 %2 ; <i32*> [#uses=1] |
| store i32 %1, i32 addrspace(1)* %3, align 4 |
| %4 = add i8 %p.01, 1 ; <i8> [#uses=1] |
| %5 = add i32 %i.02, 1 ; <i32> [#uses=2] |
| br label %bb1 |
| |
| bb1: ; preds = %bb |
| %6 = icmp slt i32 %5, %n ; <i1> [#uses=1] |
| br i1 %6, label %bb, label %bb1.return_crit_edge |
| |
| bb1.return_crit_edge: ; preds = %bb1 |
| br label %return |
| |
| return: ; preds = %bb1.return_crit_edge, %entry |
| ret void |
| } |
| |
| define void @test(i8 addrspace(1)* %a, i32 %n) nounwind { |
| ; CHECK: @test |
| entry: |
| %cmp1 = icmp sgt i32 %n, 0 |
| br i1 %cmp1, label %for.body.lr.ph, label %for.end |
| |
| for.body.lr.ph: ; preds = %entry |
| %tmp = zext i32 %n to i64 |
| br label %for.body |
| |
| for.body: ; preds = %for.body, %for.body.lr.ph |
| %indvar = phi i64 [ %indvar.next, %for.body ], [ 0, %for.body.lr.ph ] |
| %arrayidx = getelementptr i8, i8 addrspace(1)* %a, i64 %indvar |
| store i8 0, i8 addrspace(1)* %arrayidx, align 1 |
| %indvar.next = add i64 %indvar, 1 |
| %exitcond = icmp ne i64 %indvar.next, %tmp |
| br i1 %exitcond, label %for.body, label %for.cond.for.end_crit_edge |
| |
| for.cond.for.end_crit_edge: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.cond.for.end_crit_edge, %entry |
| ret void |
| } |
| |
| ; CHECK: Determining loop execution counts for: @test |
| ; CHECK-NEXT: backedge-taken count is |
| ; CHECK-NEXT: max backedge-taken count is -1 |
