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author | Dan Gohman <gohman@apple.com> | 2009-04-27 20:35:32 +0000 |
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committer | Dan Gohman <gohman@apple.com> | 2009-04-27 20:35:32 +0000 |
commit | c7749b747e634f310b7f0e075f7329dcb88f58cc (patch) | |
tree | c49c4223ff0145c11e8d9e5ca5747bfc5a03bc46 /test/CodeGen/X86/change-compare-stride-0.ll | |
parent | 487fa01673a1d13331b7173e9e6812e72dd4361e (diff) | |
download | external_llvm-c7749b747e634f310b7f0e075f7329dcb88f58cc.zip external_llvm-c7749b747e634f310b7f0e075f7329dcb88f58cc.tar.gz external_llvm-c7749b747e634f310b7f0e075f7329dcb88f58cc.tar.bz2 |
Permit ChangeCompareStride to rewrite a comparison when the factor
between the comparison's iv stride and the candidate stride is
exactly -1.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70244 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/change-compare-stride-0.ll')
-rw-r--r-- | test/CodeGen/X86/change-compare-stride-0.ll | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/test/CodeGen/X86/change-compare-stride-0.ll b/test/CodeGen/X86/change-compare-stride-0.ll new file mode 100644 index 0000000..87194d6 --- /dev/null +++ b/test/CodeGen/X86/change-compare-stride-0.ll @@ -0,0 +1,77 @@ +; RUN: llvm-as < %s | llc -march=x86 > %t +; RUN: grep {cmpl \$4294966818,} %t +; RUN: not grep inc %t +; RUN: not grep {leal 1(} %t +; RUN: not grep {leal -1(} %t +; RUN: grep dec %t | count 1 + +define void @borf(i8* nocapture %in, i8* nocapture %out) nounwind { +bb4.thread: + br label %bb2.outer + +bb2.outer: ; preds = %bb4, %bb4.thread + %indvar18 = phi i32 [ 0, %bb4.thread ], [ %indvar.next28, %bb4 ] ; <i32> [#uses=3] + %tmp34 = mul i32 %indvar18, 65535 ; <i32> [#uses=1] + %i.0.reg2mem.0.ph = add i32 %tmp34, 639 ; <i32> [#uses=1] + %0 = and i32 %i.0.reg2mem.0.ph, 65535 ; <i32> [#uses=1] + %1 = mul i32 %0, 480 ; <i32> [#uses=1] + %tmp20 = mul i32 %indvar18, -478 ; <i32> [#uses=1] + br label %bb2 + +bb2: ; preds = %bb2, %bb2.outer + %indvar = phi i32 [ 0, %bb2.outer ], [ %indvar.next, %bb2 ] ; <i32> [#uses=3] + %ctg2 = getelementptr i8* %out, i32 %tmp20 ; <i8*> [#uses=1] + %tmp21 = ptrtoint i8* %ctg2 to i32 ; <i32> [#uses=1] + %tmp23 = sub i32 %tmp21, %indvar ; <i32> [#uses=1] + %out_addr.0.reg2mem.0 = inttoptr i32 %tmp23 to i8* ; <i8*> [#uses=1] + %tmp25 = mul i32 %indvar, 65535 ; <i32> [#uses=1] + %j.0.reg2mem.0 = add i32 %tmp25, 479 ; <i32> [#uses=1] + %2 = and i32 %j.0.reg2mem.0, 65535 ; <i32> [#uses=1] + %3 = add i32 %1, %2 ; <i32> [#uses=9] + %4 = add i32 %3, -481 ; <i32> [#uses=1] + %5 = getelementptr i8* %in, i32 %4 ; <i8*> [#uses=1] + %6 = load i8* %5, align 1 ; <i8> [#uses=1] + %7 = add i32 %3, -480 ; <i32> [#uses=1] + %8 = getelementptr i8* %in, i32 %7 ; <i8*> [#uses=1] + %9 = load i8* %8, align 1 ; <i8> [#uses=1] + %10 = add i32 %3, -479 ; <i32> [#uses=1] + %11 = getelementptr i8* %in, i32 %10 ; <i8*> [#uses=1] + %12 = load i8* %11, align 1 ; <i8> [#uses=1] + %13 = add i32 %3, -1 ; <i32> [#uses=1] + %14 = getelementptr i8* %in, i32 %13 ; <i8*> [#uses=1] + %15 = load i8* %14, align 1 ; <i8> [#uses=1] + %16 = getelementptr i8* %in, i32 %3 ; <i8*> [#uses=1] + %17 = load i8* %16, align 1 ; <i8> [#uses=1] + %18 = add i32 %3, 1 ; <i32> [#uses=1] + %19 = getelementptr i8* %in, i32 %18 ; <i8*> [#uses=1] + %20 = load i8* %19, align 1 ; <i8> [#uses=1] + %21 = add i32 %3, 481 ; <i32> [#uses=1] + %22 = getelementptr i8* %in, i32 %21 ; <i8*> [#uses=1] + %23 = load i8* %22, align 1 ; <i8> [#uses=1] + %24 = add i32 %3, 480 ; <i32> [#uses=1] + %25 = getelementptr i8* %in, i32 %24 ; <i8*> [#uses=1] + %26 = load i8* %25, align 1 ; <i8> [#uses=1] + %27 = add i32 %3, 479 ; <i32> [#uses=1] + %28 = getelementptr i8* %in, i32 %27 ; <i8*> [#uses=1] + %29 = load i8* %28, align 1 ; <i8> [#uses=1] + %30 = add i8 %9, %6 ; <i8> [#uses=1] + %31 = add i8 %30, %12 ; <i8> [#uses=1] + %32 = add i8 %31, %15 ; <i8> [#uses=1] + %33 = add i8 %32, %17 ; <i8> [#uses=1] + %34 = add i8 %33, %20 ; <i8> [#uses=1] + %35 = add i8 %34, %23 ; <i8> [#uses=1] + %36 = add i8 %35, %26 ; <i8> [#uses=1] + %37 = add i8 %36, %29 ; <i8> [#uses=1] + store i8 %37, i8* %out_addr.0.reg2mem.0, align 1 + %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2] + %exitcond = icmp eq i32 %indvar.next, 478 ; <i1> [#uses=1] + br i1 %exitcond, label %bb4, label %bb2 + +bb4: ; preds = %bb2 + %indvar.next28 = add i32 %indvar18, 1 ; <i32> [#uses=2] + %exitcond29 = icmp eq i32 %indvar.next28, 638 ; <i1> [#uses=1] + br i1 %exitcond29, label %return, label %bb2.outer + +return: ; preds = %bb4 + ret void +} |