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author | Evan Cheng <evan.cheng@apple.com> | 2008-10-13 18:35:52 +0000 |
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committer | Evan Cheng <evan.cheng@apple.com> | 2008-10-13 18:35:52 +0000 |
commit | 195cd3a58d17f1c98352c6d944549b6c3a50aa1b (patch) | |
tree | 87ebaf6af3f14519e88595305b2b23ced719e504 /test/CodeGen/X86/2008-10-13-CoalescerBug.ll | |
parent | bf8c4f2c6e3d7f614fd89684f38b5b3d1dfe6e5e (diff) | |
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Also update sub-register intervals after a trivial computation is rematt'ed for a copy instruction. PR2775.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57458 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/2008-10-13-CoalescerBug.ll')
-rw-r--r-- | test/CodeGen/X86/2008-10-13-CoalescerBug.ll | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2008-10-13-CoalescerBug.ll b/test/CodeGen/X86/2008-10-13-CoalescerBug.ll new file mode 100644 index 0000000..608372e --- /dev/null +++ b/test/CodeGen/X86/2008-10-13-CoalescerBug.ll @@ -0,0 +1,42 @@ +; RUN: llvm-as < %s | llc -march=x86 +; PR2775 + +define i32 @func_77(i8 zeroext %p_79) nounwind { +entry: + %0 = tail call i32 (...)* @func_43(i32 1) nounwind ; <i32> [#uses=1] + %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] + br i1 %1, label %bb3, label %bb + +bb: ; preds = %entry + br label %bb3 + +bb3: ; preds = %bb, %entry + %p_79_addr.0 = phi i8 [ 0, %bb ], [ %p_79, %entry ] ; <i8> [#uses=1] + %2 = zext i8 %p_79_addr.0 to i32 ; <i32> [#uses=2] + %3 = zext i1 false to i32 ; <i32> [#uses=2] + %4 = tail call i32 (...)* @rshift_u_s(i32 1) nounwind ; <i32> [#uses=0] + %5 = lshr i32 %2, %2 ; <i32> [#uses=3] + %6 = icmp eq i32 0, 0 ; <i1> [#uses=1] + br i1 %6, label %bb6, label %bb9 + +bb6: ; preds = %bb3 + %7 = ashr i32 %5, %3 ; <i32> [#uses=1] + %8 = icmp eq i32 %7, 0 ; <i1> [#uses=1] + %9 = select i1 %8, i32 %3, i32 0 ; <i32> [#uses=1] + %. = shl i32 %5, %9 ; <i32> [#uses=1] + br label %bb9 + +bb9: ; preds = %bb6, %bb3 + %.0 = phi i32 [ %., %bb6 ], [ %5, %bb3 ] ; <i32> [#uses=0] + br i1 false, label %return, label %bb10 + +bb10: ; preds = %bb9 + ret i32 undef + +return: ; preds = %bb9 + ret i32 undef +} + +declare i32 @func_43(...) + +declare i32 @rshift_u_s(...) |