forked from OSchip/llvm-project
29 lines
700 B
LLVM
29 lines
700 B
LLVM
|
; RUN: llc -march=hexagon -O2 -disable-cgp < %s
|
||
|
|
; REQUIRES: asserts
|
||
|
|
;
|
||
|
|
; Tail duplication can ignore subregister information on PHI nodes, and as
|
||
|
|
; a result, generate COPY instructions between registers of different classes.
|
||
|
|
; This could lead to HexagonInstrInfo::copyPhysReg aborting on an unhandled
|
||
|
|
; src/dst combination.
|
||
|
|
;
|
||
|
|
define i32 @foo(i32 %x, i64 %y) nounwind {
|
||
|
|
entry:
|
||
|
|
%a = icmp slt i32 %x, 0
|
||
|
|
%lo = trunc i64 %y to i32
|
||
|
|
br i1 %a, label %next, label %tail
|
||
|
|
tail:
|
||
|
|
br label %join
|
||
|
|
next:
|
||
|
|
%c = icmp eq i32 %x, 0
|
||
|
|
br i1 %c, label %b1, label %tail
|
||
|
|
b1:
|
||
|
|
%t1 = lshr i64 %y, 32
|
||
|
|
%hi = trunc i64 %t1 to i32
|
||
|
|
br label %join
|
||
|
|
join:
|
||
|
|
%val = phi i32 [ %hi, %b1 ], [ %lo, %tail ]
|
||
|
|
ret i32 %val
|
||
|
|
}
|
||
|
|
|
||
|
|
|