| ; RUN: opt -analyze -enable-new-pm=0 -scalar-evolution < %s | FileCheck %s |
| ; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s |
| |
| ; CHECK: Loop %bb1: backedge-taken count is ((2 * %a.promoted) /u 2) |
| |
| target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx10.10.0" |
| |
| @a = global i8 -127, align 1 |
| @b = common global i32 0, align 4 |
| |
| declare void @use(i32) |
| |
| define i32 @main() { |
| bb: |
| %a.promoted = load i8, i8* @a |
| br label %bb1 |
| |
| bb1: ; preds = %bb1, %bb |
| %tmp = phi i8 [ %tmp2, %bb1 ], [ %a.promoted, %bb ] |
| %tmp2 = add i8 %tmp, -1 |
| %tmp3 = sext i8 %tmp to i32 |
| %tmp4 = xor i32 %tmp3, -1 |
| %tmp5 = sext i8 %tmp2 to i32 |
| %tmpf = sub nsw i32 %tmp4, %tmp5 |
| %tmp6 = trunc i32 %tmpf to i8 |
| %tmp7 = icmp eq i8 %tmp6, 0 |
| br i1 %tmp7, label %bb8, label %bb1 |
| |
| bb8: ; preds = %bb1 |
| store i8 %tmp2, i8* @a |
| store i32 %tmp4, i32* @b |
| %tmp9 = sext i8 %tmp2 to i32 |
| call void @use(i32 %tmp9) |
| ret i32 0 |
| } |
