forked from OSchip/llvm-project
37 lines
767 B
LLVM
37 lines
767 B
LLVM
; 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()
|