| Andrew Trick | ceafa2c | 2011-11-30 06:07:54 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s | FileCheck %s |
| 2 | ; |
| 3 | ; PR11431: handle a phi operand that is replaced by a postinc user. |
| Andrew Trick | 613c67e | 2011-11-30 06:26:42 +0000 | [diff] [blame] | 4 | ; LSR first expands %t3 to %t2 in %phi |
| 5 | ; LSR then expands %t2 in %phi into two decrements, one on each loop exit. |
| Andrew Trick | ceafa2c | 2011-11-30 06:07:54 +0000 | [diff] [blame] | 6 | |
| 7 | target datalayout = "e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-f128:128:128-n8:16:32:64" |
| 8 | target triple = "x86_64-unknown-linux-gnu" |
| 9 | |
| 10 | declare i1 @check() nounwind |
| 11 | |
| 12 | ; Check that LSR did something close to the behavior at the time of the bug. |
| 13 | ; CHECK: @sqlite3DropTriggerPtr |
| Andrew Trick | e2431c6 | 2013-05-25 03:08:10 +0000 | [diff] [blame] | 14 | ; CHECK: incq %r{{[a-d]}}x |
| Andrew Trick | 613c67e | 2011-11-30 06:26:42 +0000 | [diff] [blame] | 15 | ; CHECK: jne |
| Andrew Trick | e2431c6 | 2013-05-25 03:08:10 +0000 | [diff] [blame] | 16 | ; CHECK: decq %r{{[a-d]}}x |
| Andrew Trick | ceafa2c | 2011-11-30 06:07:54 +0000 | [diff] [blame] | 17 | ; CHECK: ret |
| Andrew Trick | 613c67e | 2011-11-30 06:26:42 +0000 | [diff] [blame] | 18 | define i64 @sqlite3DropTriggerPtr() nounwind { |
| 19 | bb: |
| 20 | %cmp = call zeroext i1 @check() |
| 21 | br label %bb1 |
| Andrew Trick | ceafa2c | 2011-11-30 06:07:54 +0000 | [diff] [blame] | 22 | |
| Andrew Trick | 613c67e | 2011-11-30 06:26:42 +0000 | [diff] [blame] | 23 | bb1: ; preds = %bb4, %bb |
| 24 | %t0 = phi i64 [ 0, %bb ], [ %t3, %bb4 ] |
| 25 | %t2 = phi i64 [ 1, %bb ], [ %t5, %bb4 ] |
| 26 | %t3 = add nsw i64 %t0, 1 |
| 27 | br i1 %cmp, label %bb4, label %bb8 |
| Andrew Trick | ceafa2c | 2011-11-30 06:07:54 +0000 | [diff] [blame] | 28 | |
| Andrew Trick | 613c67e | 2011-11-30 06:26:42 +0000 | [diff] [blame] | 29 | bb4: ; preds = %bb1 |
| 30 | %t5 = add nsw i64 %t2, 1 |
| 31 | br i1 %cmp, label %bb1, label %bb8 |
| Andrew Trick | ceafa2c | 2011-11-30 06:07:54 +0000 | [diff] [blame] | 32 | |
| Andrew Trick | 613c67e | 2011-11-30 06:26:42 +0000 | [diff] [blame] | 33 | bb8: ; preds = %bb8, %bb4 |
| 34 | %phi = phi i64 [ %t3, %bb1 ], [ %t2, %bb4 ] |
| 35 | ret i64 %phi |
| Andrew Trick | ceafa2c | 2011-11-30 06:07:54 +0000 | [diff] [blame] | 36 | } |