| ; RUN: opt < %s -indvars -S | FileCheck %s |
| |
| ; Indvars should insert a 64-bit induction variable to eliminate the |
| ; sext for the addressing, however it shouldn't eliminate the sext |
| ; on the other phi, since that value undergoes signed wrapping. |
| |
| define void @foo(i32* nocapture %d, i32 %n) nounwind { |
| 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 |
| |
| ; CHECK: bb: |
| ; CHECK: phi i64 |
| ; CHECK: sext i8 |
| ; CHECK-NOT: sext |
| 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* %d, i64 %2 ; <i32*> [#uses=1] |
| store i32 %1, i32* %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 |
| } |
