| ; RUN: llc -mtriple=i686-linux < %s | FileCheck %s |
| |
| |
| define i32 @bar(i32 %count) { |
| ; Test checks that basic block backedge2 is not moved before header, |
| ; because it can't reduce taken branches. |
| ; Later backedge1 and backedge2 is rotated before loop header. |
| ; CHECK-LABEL: bar |
| ; CHECK: %.entry |
| ; CHECK: %.header |
| ; CHECK: %.backedge1 |
| ; CHECK: %.backedge2 |
| ; CHECK: %.exit |
| .entry: |
| %c = shl nsw i32 %count, 2 |
| br label %.header |
| |
| .header: |
| %val1 = call i32 @foo() |
| %cond1 = icmp sgt i32 %val1, 1 |
| br i1 %cond1, label %.exit, label %.backedge1 |
| |
| .backedge1: |
| %val2 = call i32 @foo() |
| %cond2 = icmp sgt i32 %val2, 1 |
| br i1 %cond2, label %.header, label %.backedge2 |
| |
| .backedge2: |
| %val3 = call i32 @foo() |
| br label %.header |
| |
| .exit: |
| ret i32 %c |
| } |
| |
| declare i32 @foo() |
