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| author | Dan Gohman <gohman@apple.com> | 2009-07-25 16:03:30 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-07-25 16:03:30 +0000 |
| commit | 19378d622eebdf94a582555076eab7ba8d5c20ea (patch) | |
| tree | eac473b3357be97753f3d02e114d548da4d3e2f9 /test | |
| parent | 996b9d6aa9864c24178891adf29eeafd3f34d90c (diff) | |
| download | llvm-19378d622eebdf94a582555076eab7ba8d5c20ea.tar.gz llvm-19378d622eebdf94a582555076eab7ba8d5c20ea.tar.bz2 llvm-19378d622eebdf94a582555076eab7ba8d5c20ea.tar.xz | |
When attempting to sign-extend an addrec by interpreting
the step value as unsigned, the start value and the addrec
itself still need to be treated as signed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77078 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Analysis/ScalarEvolution/sext-iv-2.ll | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/sext-iv-2.ll b/test/Analysis/ScalarEvolution/sext-iv-2.ll new file mode 100644 index 0000000000..10bcc4756a --- /dev/null +++ b/test/Analysis/ScalarEvolution/sext-iv-2.ll @@ -0,0 +1,74 @@ +; RUN: llvm-as < %s | opt -analyze -scalar-evolution -disable-output | FileCheck %s + +; CHECK: %tmp3 = sext i8 %tmp2 to i32 +; CHECK: --> (sext i8 {0,+,1}<bb1> to i32) Exits: -1 +; CHECK: %tmp4 = mul i32 %tmp3, %i.02 +; CHECK: --> ((sext i8 {0,+,1}<bb1> to i32) * {0,+,1}<bb>) Exits: {0,+,-1}<bb> + +; These sexts are not foldable. + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64" + +@table = common global [32 x [256 x i32]] zeroinitializer, align 32 ; <[32 x [256 x i32]]*> [#uses=2] + +define i32 @main() nounwind { +entry: + br i1 false, label %bb5, label %bb.nph3 + +bb.nph3: ; preds = %entry + br label %bb + +bb: ; preds = %bb4, %bb.nph3 + %i.02 = phi i32 [ %tmp10, %bb4 ], [ 0, %bb.nph3 ] ; <i32> [#uses=3] + br i1 false, label %bb3, label %bb.nph + +bb.nph: ; preds = %bb + br label %bb1 + +bb1: ; preds = %bb2, %bb.nph + %j.01 = phi i32 [ %tmp8, %bb2 ], [ 0, %bb.nph ] ; <i32> [#uses=3] + %tmp2 = trunc i32 %j.01 to i8 ; <i8> [#uses=1] + %tmp3 = sext i8 %tmp2 to i32 ; <i32> [#uses=1] + %tmp4 = mul i32 %tmp3, %i.02 ; <i32> [#uses=1] + %tmp5 = sext i32 %i.02 to i64 ; <i64> [#uses=1] + %tmp6 = sext i32 %j.01 to i64 ; <i64> [#uses=1] + %tmp7 = getelementptr [32 x [256 x i32]]* @table, i64 0, i64 %tmp5, i64 %tmp6 ; <i32*> [#uses=1] + store i32 %tmp4, i32* %tmp7, align 4 + %tmp8 = add i32 %j.01, 1 ; <i32> [#uses=2] + br label %bb2 + +bb2: ; preds = %bb1 + %phitmp1 = icmp sgt i32 %tmp8, 255 ; <i1> [#uses=1] + br i1 %phitmp1, label %bb2.bb3_crit_edge, label %bb1 + +bb2.bb3_crit_edge: ; preds = %bb2 + br label %bb3 + +bb3: ; preds = %bb2.bb3_crit_edge, %bb + %tmp10 = add i32 %i.02, 1 ; <i32> [#uses=2] + br label %bb4 + +bb4: ; preds = %bb3 + %phitmp = icmp sgt i32 %tmp10, 31 ; <i1> [#uses=1] + br i1 %phitmp, label %bb4.bb5_crit_edge, label %bb + +bb4.bb5_crit_edge: ; preds = %bb4 + br label %bb5 + +bb5: ; preds = %bb4.bb5_crit_edge, %entry + %tmp12 = load i32* getelementptr ([32 x [256 x i32]]* @table, i64 0, i64 9, i64 132), align 16 ; <i32> [#uses=1] + %tmp13 = icmp eq i32 %tmp12, -1116 ; <i1> [#uses=1] + br i1 %tmp13, label %bb7, label %bb6 + +bb6: ; preds = %bb5 + call void @abort() noreturn nounwind + unreachable + +bb7: ; preds = %bb5 + br label %return + +return: ; preds = %bb7 + ret i32 0 +} + +declare void @abort() noreturn nounwind |