forked from OSchip/llvm-project
50 lines
1.7 KiB
LLVM
50 lines
1.7 KiB
LLVM
; REQUIRES: asserts
|
|
; RUN: opt -debug-only=loop-unroll-and-jam -passes="loop-unroll-and-jam" -enable-unroll-and-jam -allow-unroll-and-jam -unroll-and-jam-count=8 -disable-output %s 2>&1 | FileCheck %s
|
|
|
|
; CHECK: Loop Unroll and Jam: F[h] Loop %bb8
|
|
; CHECK: Won't unroll-and-jam; only loops with single exit blocks can be unrolled and jammed
|
|
|
|
@a = external global i16, align 2
|
|
@e = external global i32, align 4
|
|
@f = external global i16, align 2
|
|
@b = external global i16, align 2
|
|
@c = external global i64, align 8
|
|
|
|
define void @h() {
|
|
bb:
|
|
store i32 4, i32* @e, align 4
|
|
%i15 = load i16, i16* @b, align 2
|
|
%i17 = icmp slt i16 %i15, 1
|
|
br label %bb8
|
|
|
|
bb8: ; preds = %bb, %bb47
|
|
%storemerge15 = phi i32 [ 4, %bb ], [ %i49, %bb47 ]
|
|
br label %bb24
|
|
|
|
bb24: ; preds = %bb43, %bb8
|
|
%storemerge312 = phi i16 [ 0, %bb8 ], [ %i45, %bb43 ]
|
|
br i1 %i17, label %bb46.preheader, label %bb43
|
|
|
|
bb46.preheader: ; preds = %bb24
|
|
store i16 %storemerge312, i16* @f, align 2
|
|
br label %bb46
|
|
|
|
bb43: ; preds = %bb24
|
|
%i45 = add nuw nsw i16 %storemerge312, 1
|
|
%i13 = icmp ult i16 %storemerge312, 7
|
|
br i1 %i13, label %bb24, label %bb47
|
|
|
|
bb46: ; preds = %bb46.preheader, %bb46
|
|
br label %bb46
|
|
|
|
bb47: ; preds = %bb43
|
|
%i49 = add nsw i32 %storemerge15, -1
|
|
store i32 %i49, i32* @e, align 4
|
|
%i7.not = icmp eq i32 %i49, 0
|
|
br i1 %i7.not, label %bb50, label %bb8
|
|
|
|
bb50: ; preds = %bb47
|
|
store i16 %i45, i16* @f, align 2
|
|
ret void
|
|
}
|