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| author | Nadav Rotem <nrotem@apple.com> | 2013-03-20 22:53:44 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2013-03-20 22:53:44 +0000 |
| commit | 7745175be32cd54e4aa6c9cce6f642f59a34a80f (patch) | |
| tree | 7b1fa8940b3b420dc913c1c69d3b7d12c4f6ab7c /test | |
| parent | 162c800384353b639aa5bc94242e6307dcfae2d3 (diff) | |
When computing the demanded bits of Load SDNodes, make sure that we are looking at the loaded-value operand and not the ptr result (in case of pre-inc loads).
rdar://13348420
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177596 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/ARM/zextload_demandedbits.ll | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/zextload_demandedbits.ll b/test/CodeGen/ARM/zextload_demandedbits.ll new file mode 100644 index 0000000000..3d3269cae2 --- /dev/null +++ b/test/CodeGen/ARM/zextload_demandedbits.ll @@ -0,0 +1,35 @@ +; RUN: llc < %s -march=arm -mtriple="thumbv7-apple-ios3.0.0" | FileCheck %s + +target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n32-S32" + +%struct.eggs = type { %struct.spam, i16 } +%struct.spam = type { [3 x i32] } +%struct.barney = type { [2 x i32], [2 x i32] } + +; Make sure that the sext op does not get lost due to ComputeMaskedBits. +; CHECK: quux +; CHECK: lsl +; CHECK: asr +; CHECK: bl +; CHECK: pop +define void @quux(%struct.eggs* %arg) { +bb: + %tmp1 = getelementptr inbounds %struct.eggs* %arg, i32 0, i32 1 + %0 = load i16* %tmp1, align 2 + %tobool = icmp eq i16 %0, 0 + br i1 %tobool, label %bb16, label %bb3 + +bb3: ; preds = %bb + %tmp4 = bitcast i16* %tmp1 to i8* + %tmp5 = ptrtoint i16* %tmp1 to i32 + %tmp6 = shl i32 %tmp5, 20 + %tmp7 = ashr exact i32 %tmp6, 20 + %tmp14 = getelementptr inbounds %struct.barney* undef, i32 %tmp7 + %tmp15 = tail call i32 @widget(%struct.barney* %tmp14, i8* %tmp4, i32 %tmp7) + br label %bb16 + +bb16: ; preds = %bb3, %bb + ret void +} + +declare i32 @widget(%struct.barney*, i8*, i32) |