[llvm-commits] [llvm] r68123 - in /llvm/branches/Apple/Dib: lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp test/CodeGen/X86/live-out-reg-info.ll
Bill Wendling
isanbard at gmail.com
Tue Mar 31 11:18:28 PDT 2009
Author: void
Date: Tue Mar 31 13:18:28 2009
New Revision: 68123
URL: http://llvm.org/viewvc/llvm-project?rev=68123&view=rev
Log:
--- Merging (from foreign repository) r68083 into '.':
A test/CodeGen/X86/live-out-reg-info.ll
U lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
Fix live-out reg logic to not insert over-aggressive AssertZExt
instructions. This fixes lua.
Added:
llvm/branches/Apple/Dib/test/CodeGen/X86/live-out-reg-info.ll
Modified:
llvm/branches/Apple/Dib/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
Modified: llvm/branches/Apple/Dib/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Dib/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp?rev=68123&r1=68122&r2=68123&view=diff
==============================================================================
--- llvm/branches/Apple/Dib/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp (original)
+++ llvm/branches/Apple/Dib/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp Tue Mar 31 13:18:28 2009
@@ -4587,15 +4587,15 @@
isSExt = false, FromVT = MVT::i1; // ASSERT ZEXT 1
else if (NumSignBits > RegSize-8)
isSExt = true, FromVT = MVT::i8; // ASSERT SEXT 8
- else if (NumZeroBits >= RegSize-9)
+ else if (NumZeroBits >= RegSize-8)
isSExt = false, FromVT = MVT::i8; // ASSERT ZEXT 8
else if (NumSignBits > RegSize-16)
isSExt = true, FromVT = MVT::i16; // ASSERT SEXT 16
- else if (NumZeroBits >= RegSize-17)
+ else if (NumZeroBits >= RegSize-16)
isSExt = false, FromVT = MVT::i16; // ASSERT ZEXT 16
else if (NumSignBits > RegSize-32)
isSExt = true, FromVT = MVT::i32; // ASSERT SEXT 32
- else if (NumZeroBits >= RegSize-33)
+ else if (NumZeroBits >= RegSize-32)
isSExt = false, FromVT = MVT::i32; // ASSERT ZEXT 32
if (FromVT != MVT::Other) {
Added: llvm/branches/Apple/Dib/test/CodeGen/X86/live-out-reg-info.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Dib/test/CodeGen/X86/live-out-reg-info.ll?rev=68123&view=auto
==============================================================================
--- llvm/branches/Apple/Dib/test/CodeGen/X86/live-out-reg-info.ll (added)
+++ llvm/branches/Apple/Dib/test/CodeGen/X86/live-out-reg-info.ll Tue Mar 31 13:18:28 2009
@@ -0,0 +1,20 @@
+; RUN: llvm-as < %s | llc -march=x86-64 | grep testl
+
+; Make sure dagcombine doesn't eliminate the comparison due
+; to an off-by-one bug with ComputeMaskedBits information.
+
+declare void @qux()
+
+define void @foo(i32 %a) {
+ %t0 = lshr i32 %a, 23
+ br label %next
+next:
+ %t1 = and i32 %t0, 256
+ %t2 = icmp eq i32 %t1, 0
+ br i1 %t2, label %true, label %false
+true:
+ call void @qux()
+ ret void
+false:
+ ret void
+}
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