static Constant *FoldBitCast(Constant *C, Type *DestTy,
const TargetData &TD) {
- // This only handles casts to vectors currently.
+ ConstantVector *CV = dyn_cast<ConstantVector>(C);
+ IntegerType *IntVTy = dyn_cast<IntegerType>(DestTy);
+ // When casting vectors to scalar integers, catch the
+ // obvious splat cases.
+ if (IntVTy && CV) {
+ if (CV->isNullValue()) return ConstantInt::getNullValue(IntVTy);
+ if (CV->isAllOnesValue()) return ConstantInt::getAllOnesValue(IntVTy);
+ }
+
+ // The code below only handles casts to vectors currently.
VectorType *DestVTy = dyn_cast<VectorType>(DestTy);
if (DestVTy == 0)
return ConstantExpr::getBitCast(C, DestTy);
}
// If this is a bitcast from constant vector -> vector, fold it.
- ConstantVector *CV = dyn_cast<ConstantVector>(C);
if (CV == 0)
return ConstantExpr::getBitCast(C, DestTy);
; RUN: opt < %s -instcombine -S | FileCheck %s
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+target triple = "x86_64-apple-darwin10.0.0"
+
; Bitcasts between vectors and scalars are valid.
; PR4487
define i32 @test1(i64 %a) {
; CHECK-NEXT: insertelement <2 x float> <float 4.200000e+01, float undef>, float %A, i32 1
; CHECK: ret
}
+
+define i64 @ISPC0(i64 %in) {
+ %out = and i64 %in, xor (i64 bitcast (<4 x i16> <i16 -1, i16 -1, i16 -1, i16 -1> to i64), i64 -1)
+ ret i64 %out
+; CHECK: @ISPC0
+; CHECK: ret i64 0
+}