RALinScan::attemptTrivialCoalescing() was returning a virtual register instead of the physical register it is allocated to. This resulted in virtual register(s) being added the live-in sets.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72890 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 48 insertions, 0 deletions

diff --git a/test/CodeGen/X86/2009-06-04-VirtualLiveIn.ll b/test/CodeGen/X86/2009-06-04-VirtualLiveIn.ll
new file mode 100644
index 0000000000..fa90fa9426
--- /dev/null
+++ b/test/CodeGen/X86/2009-06-04-VirtualLiveIn.ll
@@ -0,0 +1,48 @@
+; RUN: llvm-as < %s | llc -march=x86
+
+	type { %struct.GAP }		; type %0
+	type { i16, i8, i8 }		; type %1
+	type { [2 x i32], [2 x i32] }		; type %2
+	type { %struct.rec* }		; type %3
+	%struct.FILE_POS = type { i8, i8, i16, i32 }
+	%struct.FIRST_UNION = type { %struct.FILE_POS }
+	%struct.FOURTH_UNION = type { %struct.STYLE }
+	%struct.GAP = type { i8, i8, i16 }
+	%struct.LIST = type { %struct.rec*, %struct.rec* }
+	%struct.SECOND_UNION = type { %1 }
+	%struct.STYLE = type { %0, %0, i16, i16, i32 }
+	%struct.THIRD_UNION = type { %2 }
+	%struct.head_type = type { [2 x %struct.LIST], %struct.FIRST_UNION, %struct.SECOND_UNION, %struct.THIRD_UNION, %struct.FOURTH_UNION, %struct.rec*, %3, %struct.rec*, %struct.rec*, %struct.rec*, %struct.rec*, %struct.rec*, %struct.rec*, %struct.rec*, %struct.rec*, i32 }
+	%struct.rec = type { %struct.head_type }
+
+define fastcc void @MinSize(%struct.rec* %x) nounwind {
+entry:
+	%tmp13 = load i8* undef, align 4		; <i8> [#uses=3]
+	%tmp14 = zext i8 %tmp13 to i32		; <i32> [#uses=2]
+	switch i32 %tmp14, label %bb1109 [
+		i32 42, label %bb246
+	]
+
+bb246:		; preds = %entry, %entry
+	switch i8 %tmp13, label %bb249 [
+		i8 42, label %bb269
+		i8 44, label %bb269
+	]
+
+bb249:		; preds = %bb246
+	%tmp3240 = icmp eq i8 %tmp13, 0		; <i1> [#uses=1]
+	br i1 %tmp3240, label %bb974, label %bb269
+
+bb269:
+	%tmp3424 = getelementptr %struct.rec* %x, i32 0, i32 0, i32 0, i32 0, i32 1		; <%struct.rec**> [#uses=0]
+	unreachable
+
+bb974:
+	unreachable
+
+bb1109:		; preds = %entry
+	call fastcc void @Image(i32 %tmp14) nounwind		; <i8*> [#uses=0]
+	unreachable
+}
+
+declare fastcc void @Image(i32) nounwind