6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-24 23:28:41 +00:00
Code Issues Projects Releases Wiki Activity

Fix SCEVExpander::visitAddRecExpr so that it remembers the induction variable

Browse Source 
it inserted rather than using LoopInfo::getCanonicalInductionVariable to
rediscover it, since that doesn't work on non-canonical loops. This fixes
infinite recurrsion on such loops; PR7562.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109419 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-07-26 18:28:14 +00:00
parent 7da5d3fc65
commit 6ebfd72f37
2 changed files with 57 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
test/Transforms/IndVarSimplify/crash.ll
View File

@@ -1,4 +1,5 @@
; RUN: opt -indvars %s -disable-output
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
declare i32 @putchar(i8) nounwind
@@ -17,3 +18,38 @@ define void @t2(i1* %P) nounwind {
; <label>:6 ; preds = %1
ret void
}
; PR7562
define void @fannkuch() nounwind {
entry: ; preds = %entry
br label %bb12
bb12: ; preds = %bb29, %entry
%i.1 = phi i32 [ undef, %entry ], [ %i.0, %bb29 ] ; <i32> [#uses=2]
%r.1 = phi i32 [ undef, %entry ], [ %r.0, %bb29 ] ; <i32> [#uses=2]
br i1 undef, label %bb13, label %bb24
bb13: ; preds = %bb12
br label %bb24
bb24: ; preds = %bb30, %bb13, %bb12
%i.2 = phi i32 [ %i.1, %bb13 ], [ %i.0, %bb30 ], [ %i.1, %bb12 ] ; <i32> [#uses=1]
%r.0 = phi i32 [ %r.1, %bb13 ], [ %2, %bb30 ], [ %r.1, %bb12 ] ; <i32> [#uses=3]
br label %bb28
bb27: ; preds = %bb28
%0 = add nsw i32 %i.0, 1 ; <i32> [#uses=1]
br label %bb28
bb28: ; preds = %bb27, %bb26
%i.0 = phi i32 [ %i.2, %bb24 ], [ %0, %bb27 ] ; <i32> [#uses=4]
%1 = icmp slt i32 %i.0, %r.0 ; <i1> [#uses=1]
br i1 %1, label %bb27, label %bb29
bb29: ; preds = %bb28
br i1 undef, label %bb12, label %bb30
bb30: ; preds = %bb29
%2 = add nsw i32 %r.0, 1 ; <i32> [#uses=1]
br label %bb24
}