opt-levels.ll
2.29 KB
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; RUN: opt < %s -S -passes="default<O2>" -unroll-runtime=true -enable-npm-unroll-and-jam -unroll-threshold-default=0 -unroll-threshold-aggressive=300 | FileCheck %s -check-prefix=O2
; RUN: opt < %s -S -passes="default<O3>" -unroll-runtime=true -enable-npm-unroll-and-jam -unroll-threshold-default=0 -unroll-threshold-aggressive=300 | FileCheck %s -check-prefix=O3
; RUN: opt < %s -S -passes="default<Os>" -unroll-runtime=true -enable-npm-unroll-and-jam -unroll-threshold-default=0 -unroll-threshold-aggressive=300 | FileCheck %s -check-prefix=Os
; RUN: opt < %s -S -passes="default<Oz>" -unroll-runtime=true -enable-npm-unroll-and-jam -unroll-threshold-default=0 -unroll-threshold-aggressive=300 | FileCheck %s -check-prefix=Oz
; Check that Os and Oz are optimized like O2, not like O3. To easily highlight
; the behavior, we artificially disable unrolling for anything but O3 by setting
; the default threshold to 0.
; O3: for.inner.1
; O2-NOT: for.inner.1
; Os-NOT: for.inner.1
; Oz-NOT: for.inner.1
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
define void @test1(i32 %I, i32 %J, i32* noalias nocapture %A, i32* noalias nocapture readonly %B) #0 {
entry:
%cmp = icmp ne i32 %J, 0
%cmpJ = icmp ne i32 %I, 0
%or.cond = and i1 %cmp, %cmpJ
br i1 %or.cond, label %for.outer.preheader, label %for.end
for.outer.preheader:
br label %for.outer
for.outer:
%i = phi i32 [ %add8, %for.latch ], [ 0, %for.outer.preheader ]
br label %for.inner
for.inner:
%j = phi i32 [ 0, %for.outer ], [ %inc, %for.inner ]
%sum = phi i32 [ 0, %for.outer ], [ %add, %for.inner ]
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %j
%0 = load i32, i32* %arrayidx, align 4, !tbaa !5
%add = add i32 %0, %sum
%inc = add nuw i32 %j, 1
%exitcond = icmp eq i32 %inc, %J
br i1 %exitcond, label %for.latch, label %for.inner
for.latch:
%add.lcssa = phi i32 [ %add, %for.inner ]
%arrayidx6 = getelementptr inbounds i32, i32* %A, i32 %i
store i32 %add.lcssa, i32* %arrayidx6, align 4, !tbaa !5
%add8 = add nuw i32 %i, 1
%exitcond25 = icmp eq i32 %add8, %I
br i1 %exitcond25, label %for.end.loopexit, label %for.outer
for.end.loopexit:
br label %for.end
for.end:
ret void
}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}