diff options
| author | Dan Gohman <gohman@apple.com> | 2009-06-03 19:11:31 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-06-03 19:11:31 +0000 |
| commit | 68c9344056e714336a522148e0e468f35035c650 (patch) | |
| tree | d0bb058cda52c32738edd29527ed38d45212f634 /test/Transforms/IndVarSimplify/variable-stride-ivs-1.ll | |
| parent | 222858256f4a2e799fcaef9c90056ed537db56bc (diff) | |
| download | external_llvm-68c9344056e714336a522148e0e468f35035c650.zip external_llvm-68c9344056e714336a522148e0e468f35035c650.tar.gz external_llvm-68c9344056e714336a522148e0e468f35035c650.tar.bz2 | |
Don't attempt to simplify an non-affine IV expression if it can't
be simplified to a loop-invariant value. This fixes PR4315.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72798 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/IndVarSimplify/variable-stride-ivs-1.ll')
| -rw-r--r-- | test/Transforms/IndVarSimplify/variable-stride-ivs-1.ll | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/test/Transforms/IndVarSimplify/variable-stride-ivs-1.ll b/test/Transforms/IndVarSimplify/variable-stride-ivs-1.ll new file mode 100644 index 0000000..075e899 --- /dev/null +++ b/test/Transforms/IndVarSimplify/variable-stride-ivs-1.ll @@ -0,0 +1,43 @@ +; RUN: llvm-as < %s | opt -indvars +; PR4315 + +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-f80:128:128" +target triple = "x86_64-undermydesk-freebsd8.0" + %struct.mbuf = type <{ %struct.mbuf*, i8*, i32, i8, i8, i8, i8 }> + +define i32 @crash(%struct.mbuf* %m) nounwind { +entry: + br label %for.cond + +for.cond: ; preds = %if.end, %entry + %i.0 = phi i32 [ 0, %entry ], [ %inc, %if.end ] ; <i32> [#uses=3] + %chksum.0 = phi i8 [ 0, %entry ], [ %conv3, %if.end ] ; <i8> [#uses=3] + %cmp = icmp slt i32 %i.0, 1 ; <i1> [#uses=1] + br i1 %cmp, label %for.body, label %do.body + +for.body: ; preds = %for.cond + br i1 undef, label %if.end, label %do.body + +if.end: ; preds = %for.body + %i.02 = trunc i32 %i.0 to i8 ; <i8> [#uses=1] + %conv3 = add i8 %chksum.0, %i.02 ; <i8> [#uses=1] + %inc = add i32 %i.0, 1 ; <i32> [#uses=1] + br label %for.cond + +do.body: ; preds = %do.cond, %for.body, %for.cond + %chksum.2 = phi i8 [ undef, %do.cond ], [ %chksum.0, %for.body ], [ %chksum.0, %for.cond ] ; <i8> [#uses=1] + br i1 undef, label %do.cond, label %bb.nph + +bb.nph: ; preds = %do.body + br label %while.body + +while.body: ; preds = %while.body, %bb.nph + %chksum.13 = phi i8 [ undef, %while.body ], [ %chksum.2, %bb.nph ] ; <i8> [#uses=0] + br i1 undef, label %do.cond, label %while.body + +do.cond: ; preds = %while.body, %do.body + br i1 false, label %do.end, label %do.body + +do.end: ; preds = %do.cond + ret i32 0 +} |