fix another libgcc blocker

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59026 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Alpha/AlphaISelLowering.cpp b/lib/Target/Alpha/AlphaISelLowering.cpp
index 787883073553441d09c55c90538b74b965af5fd8..1872b42275eead66123996a8410578b8a22506f7 100644 (file)
--- a/lib/Target/Alpha/AlphaISelLowering.cpp
+++ b/lib/Target/Alpha/AlphaISelLowering.cpp
@@ -97,6 +97,7 @@ AlphaTargetLowering::AlphaTargetLowering(TargetMachine &TM) : TargetLowering(TM)
   setOperationAction(ISD::SUBE     , MVT::i64, Expand);
 
   setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
+  setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
 
 
   // We don't support sin/cos/sqrt/pow

diff --git a/test/CodeGen/Alpha/2008-11-10-smul_lohi.ll b/test/CodeGen/Alpha/2008-11-10-smul_lohi.ll
new file mode 100644 (file)
index 0000000..9d814da
--- /dev/null
+++ b/test/CodeGen/Alpha/2008-11-10-smul_lohi.ll
@@ -0,0 +1,22 @@
+; RUN: llvm-as < %s | llc -march=alpha
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-f128:128:128"
+target triple = "alphaev6-unknown-linux-gnu"
+
+define i64 @__mulvdi3(i64 %a, i64 %b) nounwind {
+entry:
+       %0 = sext i64 %a to i128                ; <i128> [#uses=1]
+       %1 = sext i64 %b to i128                ; <i128> [#uses=1]
+       %2 = mul i128 %1, %0            ; <i128> [#uses=2]
+       %3 = lshr i128 %2, 64           ; <i128> [#uses=1]
+       %4 = trunc i128 %3 to i64               ; <i64> [#uses=1]
+       %5 = trunc i128 %2 to i64               ; <i64> [#uses=1]
+       %6 = icmp eq i64 %4, 0          ; <i1> [#uses=1]
+       br i1 %6, label %bb1, label %bb
+
+bb:            ; preds = %entry
+       unreachable
+
+bb1:           ; preds = %entry
+       ret i64 %5
+}