From 940b67465dbd12240dfc3d88288b2da9563ccdd7 Mon Sep 17 00:00:00 2001 From: Juergen Ributzka Date: Sat, 12 Apr 2014 02:36:28 +0000 Subject: [ARM64] Fix the cost model for cheap large constants. Originally the cost model would give up for large constants and just return the maximum cost. This is not what we want for constant hoisting, because some of these constants are large in bitwidth, but are still cheap to materialize. This commit fixes the cost model to either return TCC_Free if the cost cannot be determined, or accurately calculate the cost even for large constants (bitwidth > 128). This fixes . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206100 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/ConstantHoisting/ARM64/large-immediate.ll | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'test/Transforms') diff --git a/test/Transforms/ConstantHoisting/ARM64/large-immediate.ll b/test/Transforms/ConstantHoisting/ARM64/large-immediate.ll index 0965a45ea6..92ad6ee70d 100644 --- a/test/Transforms/ConstantHoisting/ARM64/large-immediate.ll +++ b/test/Transforms/ConstantHoisting/ARM64/large-immediate.ll @@ -8,3 +8,11 @@ define i128 @test1(i128 %a) nounwind { ret i128 %2 } +; Check that we don't hoist large, but cheap constants +define i512 @test2(i512 %a) nounwind { +; CHECK-LABEL: test2 +; CHECK-NOT: %const = bitcast i512 7 to i512 + %1 = and i512 %a, 7 + %2 = or i512 %1, 7 + ret i512 %2 +} -- cgit v1.2.3