| Dan Gohman | baf1afb | 2011-06-04 07:05:05 +0000 | [diff] [blame] | 1 | ; RUN: opt -basicaa -gvn -S < %s | FileCheck %s |
| 2 | |
| 3 | target datalayout = "e-p:64:64:64-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" |
| 4 | |
| 5 | ; GVN shouldn't PRE the load around the loop backedge because it's |
| 6 | ; not actually redundant around the loop backedge, despite appearances |
| 7 | ; if phi-translation is ignored. |
| 8 | |
| 9 | ; CHECK: define void @test0(i8* %begin) |
| 10 | ; CHECK: loop: |
| David Blaikie | a79ac14 | 2015-02-27 21:17:42 +0000 | [diff] [blame] | 11 | ; CHECK: %l0 = load i8, i8* %phi |
| Dan Gohman | baf1afb | 2011-06-04 07:05:05 +0000 | [diff] [blame] | 12 | ; CHECK: call void @bar(i8 %l0) |
| David Blaikie | a79ac14 | 2015-02-27 21:17:42 +0000 | [diff] [blame] | 13 | ; CHECK: %l1 = load i8, i8* %phi |
| Dan Gohman | baf1afb | 2011-06-04 07:05:05 +0000 | [diff] [blame] | 14 | define void @test0(i8* %begin) { |
| 15 | entry: |
| 16 | br label %loop |
| 17 | |
| 18 | loop: |
| 19 | %phi = phi i8* [ %begin, %entry ], [ %next, %loop ] |
| David Blaikie | a79ac14 | 2015-02-27 21:17:42 +0000 | [diff] [blame] | 20 | %l0 = load i8, i8* %phi |
| Dan Gohman | baf1afb | 2011-06-04 07:05:05 +0000 | [diff] [blame] | 21 | call void @bar(i8 %l0) |
| David Blaikie | a79ac14 | 2015-02-27 21:17:42 +0000 | [diff] [blame] | 22 | %l1 = load i8, i8* %phi |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 23 | %next = getelementptr inbounds i8, i8* %phi, i8 %l1 |
| Dan Gohman | baf1afb | 2011-06-04 07:05:05 +0000 | [diff] [blame] | 24 | br label %loop |
| 25 | } |
| 26 | |
| 27 | declare void @bar(i8) |