mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 02:52:53 +02:00
f25364903d
r272715 broke libcxx because it did not correctly handle cases where the last iteration of one IV is the second-to-last iteration of another. Original commit message: Vectorizing loops with "escaping" IVs has been disabled since r190790, due to PR17179. This re-enables it, with support for external use of both "post-increment" (last iteration) and "pre-increment" (second-to-last iteration) IVs. llvm-svn: 272742
43 lines
1.3 KiB
LLVM
43 lines
1.3 KiB
LLVM
; RUN: opt -S -loop-vectorize -force-vector-interleave=1 -force-vector-width=2 < %s 2>&1 | FileCheck %s
|
|
|
|
; CHECK: remark: {{.*}}: loop not vectorized: value could not be identified as an induction or reduction variable
|
|
|
|
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S128"
|
|
|
|
@f = common global i32 0, align 4
|
|
@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
|
|
@c = common global i32 0, align 4
|
|
@a = common global i32 0, align 4
|
|
@b = common global i32 0, align 4
|
|
@e = common global i32 0, align 4
|
|
|
|
; We used to vectorize this loop. But it has a value that is used outside of the
|
|
; and is not a recognized reduction variable "tmp17".
|
|
|
|
; CHECK-LABEL: @main(
|
|
; CHECK-NOT: <2 x i32>
|
|
|
|
define i32 @main() {
|
|
bb:
|
|
%b.promoted = load i32, i32* @b, align 4
|
|
br label %.lr.ph.i
|
|
|
|
.lr.ph.i:
|
|
%tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ]
|
|
%tmp2 = icmp sgt i32 %tmp8, 10
|
|
br i1 %tmp2, label %bb16, label %bb10
|
|
|
|
bb10:
|
|
br label %bb16
|
|
|
|
bb16:
|
|
%tmp17 = phi i32 [ 0, %bb10 ], [ 1, %.lr.ph.i ]
|
|
%tmp18 = add nsw i32 %tmp8, 1
|
|
%tmp19 = icmp slt i32 %tmp18, 4
|
|
br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit
|
|
|
|
f1.exit.loopexit:
|
|
%.lcssa = phi i32 [ %tmp17, %bb16 ]
|
|
ret i32 %.lcssa
|
|
}
|