[llvm-commits] [llvm] r43692 - in /llvm/trunk: lib/CodeGen/LiveIntervalAnalysis.cpp test/CodeGen/X86/2007-11-04-LiveIntervalCrash.ll

[Evan Cheng]

Author: evancheng
Date: Sun Nov  4 18:59:10 2007
New Revision: 43692

URL: http://llvm.org/viewvc/llvm-project?rev=43692&view=rev
Log:
Fix PR1187.

Added:
    llvm/trunk/test/CodeGen/X86/2007-11-04-LiveIntervalCrash.ll
Modified:
    llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp

Modified: llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp?rev=43692&r1=43691&r2=43692&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp (original)
+++ llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp Sun Nov  4 18:59:10 2007
@@ -466,7 +466,7 @@
           continue;
         if (MRegisterInfo::isVirtualRegister(PhysReg))
           PhysReg = vrm.getPhys(PhysReg);
-        if (mri_->regsOverlap(PhysReg, reg))
+        if (PhysReg && mri_->regsOverlap(PhysReg, reg))
           return true;
       }
     }

Added: llvm/trunk/test/CodeGen/X86/2007-11-04-LiveIntervalCrash.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/2007-11-04-LiveIntervalCrash.ll?rev=43692&view=auto

==============================================================================
--- llvm/trunk/test/CodeGen/X86/2007-11-04-LiveIntervalCrash.ll (added)
+++ llvm/trunk/test/CodeGen/X86/2007-11-04-LiveIntervalCrash.ll Sun Nov  4 18:59:10 2007
@@ -0,0 +1,37 @@
+; RUN: llvm-as < %s | llc -mtriple=x86_64-unknown-linux-gnu
+; PR1187
+
+        %struct.dentry = type { %struct.dentry_operations* }
+        %struct.dentry_operations = type { i32 (%struct.dentry*, %struct.qstr*)* }
+        %struct.qstr = type { i32, i32, i8* }
+
+define %struct.dentry* @d_hash_and_lookup(%struct.dentry* %dir, %struct.qstr* %name) {
+entry:
+        br i1 false, label %bb37, label %bb
+
+bb:             ; preds = %bb, %entry
+        %name8.0.reg2mem.0.rec = phi i64 [ %indvar.next, %bb ], [ 0, %entry ]           ; <i64> [#uses=1]
+        %hash.0.reg2mem.0 = phi i64 [ %tmp27, %bb ], [ 0, %entry ]              ; <i64> [#uses=1]
+        %tmp13 = load i8* null, align 1         ; <i8> [#uses=1]
+        %tmp1314 = zext i8 %tmp13 to i64                ; <i64> [#uses=1]
+        %tmp25 = lshr i64 %tmp1314, 4           ; <i64> [#uses=1]
+        %tmp22 = add i64 %tmp25, %hash.0.reg2mem.0              ; <i64> [#uses=1]
+        %tmp26 = add i64 %tmp22, 0              ; <i64> [#uses=1]
+        %tmp27 = mul i64 %tmp26, 11             ; <i64> [#uses=2]
+        %indvar.next = add i64 %name8.0.reg2mem.0.rec, 1                ; <i64> [#uses=2]
+        %exitcond = icmp eq i64 %indvar.next, 0         ; <i1> [#uses=1]
+        br i1 %exitcond, label %bb37.loopexit, label %bb
+
+bb37.loopexit:          ; preds = %bb
+        %phitmp = trunc i64 %tmp27 to i32               ; <i32> [#uses=1]
+        br label %bb37
+
+bb37:           ; preds = %bb37.loopexit, %entry
+        %hash.0.reg2mem.1 = phi i32 [ %phitmp, %bb37.loopexit ], [ 0, %entry ]          ; <i32> [#uses=1]
+        store i32 %hash.0.reg2mem.1, i32* null, align 8
+        %tmp75 = tail call i32 null( %struct.dentry* %dir, %struct.qstr* %name )                ; <i32> [#uses=0]
+        %tmp84 = tail call i32 (...)* @d_lookup( %struct.dentry* %dir, %struct.qstr* %name )            ; <i32> [#uses=0]
+        ret %struct.dentry* null
+}
+
+declare i32 @d_lookup(...)