2009-10-24 23:23:04 +00:00
|
|
|
; RUN: opt < %s -jump-threading -loop-rotate -instcombine -indvars -loop-unroll -simplifycfg -S -verify-dom-info -verify-loop-info > %t
|
2011-08-12 22:50:01 +00:00
|
|
|
; RUN: grep {store volatile} %t | count 3
|
2009-05-04 18:40:41 +00:00
|
|
|
; RUN: not grep {br label} %t
|
|
|
|
|
|
|
|
|
|
; Jump threading should not prevent this loop from being unrolled.
|
|
|
|
|
|
|
|
|
|
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-f80:128:128"
|
|
|
|
|
target triple = "i386-apple-darwin9.6"
|
|
|
|
|
@v1 = external global i32 ; <i32*> [#uses=2]
|
|
|
|
|
|
|
|
|
|
define i32 @unroll() nounwind {
|
|
|
|
|
entry:
|
|
|
|
|
br label %bb4
|
|
|
|
|
|
|
|
|
|
bb: ; preds = %bb4
|
|
|
|
|
%0 = icmp eq i32 %i.0, 0 ; <i1> [#uses=1]
|
|
|
|
|
br i1 %0, label %bb1, label %bb2
|
|
|
|
|
|
|
|
|
|
bb1: ; preds = %bb
|
|
|
|
|
volatile store i32 1000, i32* @v1, align 4
|
|
|
|
|
br label %bb3
|
|
|
|
|
|
|
|
|
|
bb2: ; preds = %bb
|
|
|
|
|
volatile store i32 1001, i32* @v1, align 4
|
|
|
|
|
br label %bb3
|
|
|
|
|
|
|
|
|
|
bb3: ; preds = %bb2, %bb1
|
|
|
|
|
%1 = add i32 %i.0, 1 ; <i32> [#uses=1]
|
|
|
|
|
br label %bb4
|
|
|
|
|
|
|
|
|
|
bb4: ; preds = %bb3, %entry
|
|
|
|
|
%i.0 = phi i32 [ 0, %entry ], [ %1, %bb3 ] ; <i32> [#uses=3]
|
|
|
|
|
%2 = icmp sgt i32 %i.0, 2 ; <i1> [#uses=1]
|
|
|
|
|
br i1 %2, label %bb5, label %bb
|
|
|
|
|
|
|
|
|
|
bb5: ; preds = %bb4
|
|
|
|
|
ret i32 0
|
|
|
|
|
}
|
