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| author | Dan Gohman <gohman@apple.com> | 2009-07-16 17:34:36 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-07-16 17:34:36 +0000 |
| commit | 850f791abc3ffc3f5fb73712df2f4a2d4cc0b998 (patch) | |
| tree | 32f8fb7aba192983e91dca901e54d371373117c6 /test/Transforms/IndVarSimplify/lftr-promote.ll | |
| parent | 358ab1dbb016c50528ada714fa400c821438f2ee (diff) | |
| download | llvm-850f791abc3ffc3f5fb73712df2f4a2d4cc0b998.tar.gz llvm-850f791abc3ffc3f5fb73712df2f4a2d4cc0b998.tar.bz2 llvm-850f791abc3ffc3f5fb73712df2f4a2d4cc0b998.tar.xz | |
Fill in some holes in ScalarEvolution's loop iteration condition
analysis. This allows indvars to emit a simpler loop trip count
expression.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76085 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/IndVarSimplify/lftr-promote.ll')
| -rw-r--r-- | test/Transforms/IndVarSimplify/lftr-promote.ll | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/test/Transforms/IndVarSimplify/lftr-promote.ll b/test/Transforms/IndVarSimplify/lftr-promote.ll new file mode 100644 index 0000000000..b2cb770dd6 --- /dev/null +++ b/test/Transforms/IndVarSimplify/lftr-promote.ll @@ -0,0 +1,38 @@ +; RUN: llvm-as < %s | opt -indvars | llvm-dis | grep add | count 1 + +; Indvars should be able to compute the exit value of this loop +; without any additional arithmetic. The only add needed should +; be the canonical IV increment. + +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" + +define void @foo(double* %p, i32 %n) nounwind { +entry: + %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1] + br i1 %0, label %bb.nph, label %return + +bb.nph: ; preds = %entry + br label %bb2 + +bb2: ; preds = %bb3, %bb.nph + %i.01 = phi i32 [ %7, %bb3 ], [ 0, %bb.nph ] ; <i32> [#uses=3] + %1 = sext i32 %i.01 to i64 ; <i64> [#uses=1] + %2 = getelementptr double* %p, i64 %1 ; <double*> [#uses=1] + %3 = load double* %2, align 8 ; <double> [#uses=1] + %4 = fmul double %3, 1.100000e+00 ; <double> [#uses=1] + %5 = sext i32 %i.01 to i64 ; <i64> [#uses=1] + %6 = getelementptr double* %p, i64 %5 ; <double*> [#uses=1] + store double %4, double* %6, align 8 + %7 = add i32 %i.01, 1 ; <i32> [#uses=2] + br label %bb3 + +bb3: ; preds = %bb2 + %8 = icmp slt i32 %7, %n ; <i1> [#uses=1] + br i1 %8, label %bb2, label %bb3.return_crit_edge + +bb3.return_crit_edge: ; preds = %bb3 + br label %return + +return: ; preds = %bb3.return_crit_edge, %entry + ret void +} |