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Diffstat (limited to 'test/CodeGen/X86/loop-strength-reduce-2.ll')
| -rw-r--r-- | test/CodeGen/X86/loop-strength-reduce-2.ll | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/test/CodeGen/X86/loop-strength-reduce-2.ll b/test/CodeGen/X86/loop-strength-reduce-2.ll new file mode 100644 index 0000000000..1375793bce --- /dev/null +++ b/test/CodeGen/X86/loop-strength-reduce-2.ll @@ -0,0 +1,30 @@ +; RUN: llvm-as < %s | llc -march=x86 -relocation-model=pic | \ +; RUN: grep {A-} | count 1 +; +; Make sure the common loop invariant A is hoisted up to preheader, +; since too many registers are needed to subsume it into the addressing modes. + +@A = global [16 x [16 x i32]] zeroinitializer, align 32 ; <[16 x [16 x i32]]*> [#uses=2] + +define void @test(i32 %row, i32 %N.in) nounwind { +entry: + %N = bitcast i32 %N.in to i32 ; <i32> [#uses=1] + %tmp5 = icmp sgt i32 %N.in, 0 ; <i1> [#uses=1] + br i1 %tmp5, label %cond_true, label %return + +cond_true: ; preds = %cond_true, %entry + %indvar = phi i32 [ 0, %entry ], [ %indvar.next, %cond_true ] ; <i32> [#uses=2] + %i.0.0 = bitcast i32 %indvar to i32 ; <i32> [#uses=2] + %tmp2 = add i32 %i.0.0, 1 ; <i32> [#uses=1] + %tmp = getelementptr [16 x [16 x i32]]* @A, i32 0, i32 %row, i32 %tmp2 ; <i32*> [#uses=1] + store i32 4, i32* %tmp + %tmp5.upgrd.1 = add i32 %i.0.0, 2 ; <i32> [#uses=1] + %tmp7 = getelementptr [16 x [16 x i32]]* @A, i32 0, i32 %row, i32 %tmp5.upgrd.1 ; <i32*> [#uses=1] + store i32 5, i32* %tmp7 + %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2] + %exitcond = icmp eq i32 %indvar.next, %N ; <i1> [#uses=1] + br i1 %exitcond, label %return, label %cond_true + +return: ; preds = %cond_true, %entry + ret void +} |