Fix PR3401: when using large integers, the type

returned by getShiftAmountTy may be too small
to hold shift values (it is an i8 on x86-32).
Before and during type legalization, use a large
but legal type for shift amounts: getPointerTy;
afterwards use getShiftAmountTy, fixing up any
shift amounts with a big type during operation
legalization.  Thanks to Dan for writing the
original patch (which I shamelessly pillaged).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63482 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 31 insertions, 0 deletions

diff --git a/test/CodeGen/X86/2009-01-31-BigShift3.ll b/test/CodeGen/X86/2009-01-31-BigShift3.ll
new file mode 100644
index 0000000000..c92c86a092
--- /dev/null
+++ b/test/CodeGen/X86/2009-01-31-BigShift3.ll
@@ -0,0 +1,31 @@
+; RUN: llvm-as < %s | llc -march=x86
+; PR3450
+
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "i386-apple-darwin7"
+	%struct.BitMap = type { i8* }
+	%struct.BitMapListStruct = type { %struct.BitMap, %struct.BitMapListStruct*, %struct.BitMapListStruct* }
+	%struct.Material = type { float, float, float, %struct.Material*, %struct.Material* }
+	%struct.ObjPoint = type { double, double, double, double, double, double }
+	%struct.ObjectStruct = type { [57 x i8], %struct.PointListStruct*, %struct.Poly3Struct*, %struct.Poly4Struct*, %struct.Texture*, %struct.Material*, %struct.Point, i32, i32, %struct.Point, %struct.Point, %struct.Point, %struct.ObjectStruct*, %struct.ObjectStruct*, i32, i32, i32, i32, i32, i32, i32, %struct.ObjectStruct*, %struct.ObjectStruct* }
+	%struct.Point = type { double, double, double }
+	%struct.PointListStruct = type { %struct.ObjPoint*, %struct.PointListStruct*, %struct.PointListStruct* }
+	%struct.Poly3Struct = type { [3 x %struct.ObjPoint*], %struct.Material*, %struct.Texture*, %struct.Poly3Struct*, %struct.Poly3Struct* }
+	%struct.Poly4Struct = type { [4 x %struct.ObjPoint*], %struct.Material*, %struct.Texture*, %struct.Poly4Struct*, %struct.Poly4Struct* }
+	%struct.Texture = type { %struct.Point, %struct.BitMapListStruct*, %struct.Point, %struct.Point, %struct.Point, %struct.Texture*, %struct.Texture* }
+
+define fastcc void @ScaleObjectAdd(%struct.ObjectStruct* %o, double %sx, double %sy, double %sz) nounwind {
+entry:
+	%sz101112.ins = or i960 0, 0		; <i960> [#uses=1]
+	br i1 false, label %return, label %bb1.preheader
+
+bb1.preheader:		; preds = %entry
+	%0 = lshr i960 %sz101112.ins, 640		; <i960> [#uses=0]
+	br label %bb1
+
+bb1:		; preds = %bb1, %bb1.preheader
+	br label %bb1
+
+return:		; preds = %entry
+	ret void
+}