| Jiangning Liu | dd6e12d | 2014-08-11 05:17:19 +0000 | [diff] [blame^] | 1 | ; RUN: llc < %s -mtriple=aarch64-linux-gnuabi -O2 | FileCheck %s |
| 2 | |
| 3 | ; marked as external to prevent possible optimizations |
| 4 | @a = external global i32 |
| 5 | @b = external global i32 |
| 6 | @c = external global i32 |
| 7 | @d = external global i32 |
| 8 | @e = external global i32 |
| 9 | |
| 10 | define void @combine-sign-comparisons-by-cse(i32 *%arg) { |
| 11 | ; CHECK: cmp |
| 12 | ; CHECK: b.ge |
| 13 | ; CHECK-NOT: cmp |
| 14 | ; CHECK: b.le |
| 15 | |
| 16 | entry: |
| 17 | %a = load i32* @a, align 4 |
| 18 | %b = load i32* @b, align 4 |
| 19 | %c = load i32* @c, align 4 |
| 20 | %d = load i32* @d, align 4 |
| 21 | %e = load i32* @e, align 4 |
| 22 | |
| 23 | %cmp = icmp slt i32 %a, %e |
| 24 | br i1 %cmp, label %land.lhs.true, label %lor.lhs.false |
| 25 | |
| 26 | land.lhs.true: |
| 27 | %cmp1 = icmp eq i32 %b, %c |
| 28 | br i1 %cmp1, label %return, label %if.end |
| 29 | |
| 30 | lor.lhs.false: |
| 31 | %cmp2 = icmp sgt i32 %a, %e |
| 32 | br i1 %cmp2, label %land.lhs.true3, label %if.end |
| 33 | |
| 34 | land.lhs.true3: |
| 35 | %cmp4 = icmp eq i32 %b, %d |
| 36 | br i1 %cmp4, label %return, label %if.end |
| 37 | |
| 38 | if.end: |
| 39 | br label %return |
| 40 | |
| 41 | return: |
| 42 | %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] |
| 43 | store i32 %a, i32 *%arg |
| 44 | ret void |
| 45 | } |