mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-13 23:18:51 +00:00
d23e55c402
Summary: After r249211, SCEV can see through some LCSSA phis. Add a `replacementPreservesLCSSAForm` check before replacing uses of these phi nodes with a simplified use of the induction variable to avoid breaking LCSSA. Fixes 25047. Depends on D13460. Reviewers: atrick, hfinkel Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D13461 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@249575 91177308-0d34-0410-b5e6-96231b3b80d8
50 lines
1.9 KiB
LLVM
50 lines
1.9 KiB
LLVM
; RUN: opt -indvars -S < %s | FileCheck %s
|
|
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-apple-macosx10.11.0"
|
|
|
|
define void @fn1(i1 %c0, i1 %c1) {
|
|
; CHECK-LABEL: @fn1(
|
|
entry:
|
|
br i1 %c0, label %for.end.34, label %for.cond.1thread-pre-split
|
|
|
|
for.cond.loopexit: ; preds = %for.end.29, %for.end.7
|
|
%f.lcssa = phi i32 [ %f.1, %for.end.29 ], [ %f.1, %for.end.7 ]
|
|
br i1 %c1, label %for.end.34, label %for.cond.1thread-pre-split
|
|
|
|
for.cond.1thread-pre-split: ; preds = %for.cond.loopexit, %entry
|
|
%f.047 = phi i32 [ %f.lcssa, %for.cond.loopexit ], [ 0, %entry ]
|
|
br label %for.cond.1
|
|
|
|
for.cond.1: ; preds = %for.cond.1, %for.cond.1thread-pre-split
|
|
br i1 %c1, label %for.cond.4, label %for.cond.1
|
|
|
|
for.cond.4: ; preds = %for.end.29, %for.cond.1
|
|
%f.1 = phi i32 [ 0, %for.end.29 ], [ %f.047, %for.cond.1 ]
|
|
br label %for.cond.5
|
|
|
|
for.cond.5: ; preds = %for.cond.5, %for.cond.4
|
|
%h.0 = phi i32 [ 0, %for.cond.4 ], [ %inc, %for.cond.5 ]
|
|
%cmp = icmp slt i32 %h.0, 1
|
|
%inc = add nsw i32 %h.0, 1
|
|
br i1 %cmp, label %for.cond.5, label %for.end.7
|
|
|
|
for.end.7: ; preds = %for.cond.5
|
|
%g.lcssa = phi i32 [ %h.0, %for.cond.5 ]
|
|
%tobool10 = icmp eq i32 %g.lcssa, 0
|
|
br i1 %tobool10, label %for.end.8, label %for.cond.loopexit
|
|
|
|
for.end.8: ; preds = %for.end.7
|
|
br i1 %c1, label %for.cond.19, label %for.end.29
|
|
|
|
for.cond.19: ; preds = %for.cond.19, %for.end.8
|
|
br label %for.cond.19
|
|
|
|
for.end.29: ; preds = %for.end.8
|
|
%tobool30 = icmp eq i32 %f.1, 0
|
|
br i1 %tobool30, label %for.cond.4, label %for.cond.loopexit
|
|
|
|
for.end.34: ; preds = %for.cond.loopexit, %entry
|
|
ret void
|
|
}
|