ConstantExpr::getGetElementPtr(
(Constant*)CE->getOperand(0), Idxs, NumIdx);
}
-
- // Fold: getelementptr (i8* inttoptr (i64 1 to i8*), i32 -1)
- // Into: inttoptr (i64 0 to i8*)
- // This happens with pointers to member functions in C++.
- if (CE->getOpcode() == Instruction::IntToPtr && NumIdx == 1 &&
- isa<ConstantInt>(CE->getOperand(0)) && isa<ConstantInt>(Idxs[0]) &&
- cast<PointerType>(CE->getType())->getElementType() ==
- Type::getInt8Ty(Context)) {
- Constant *Base = CE->getOperand(0);
- Constant *Offset = Idxs[0];
-
- // Convert the smaller integer to the larger type.
- if (Offset->getType()->getPrimitiveSizeInBits() <
- Base->getType()->getPrimitiveSizeInBits())
- Offset = ConstantExpr::getSExt(Offset, Base->getType());
- else if (Base->getType()->getPrimitiveSizeInBits() <
- Offset->getType()->getPrimitiveSizeInBits())
- Base = ConstantExpr::getZExt(Base, Offset->getType());
-
- Base = ConstantExpr::getAdd(Base, Offset);
- return ConstantExpr::getIntToPtr(Base, CE->getType());
- }
}
// Check to see if any array indices are not within the corresponding
--- /dev/null
+; RUN: opt -S -o - < %s | FileCheck --check-prefix=PLAIN %s
+; RUN: opt -S -o - -instcombine -globalopt < %s | FileCheck --check-prefix=OPT %s
+
+; The automatic constant folder in opt does not have targetdata access, so
+; it can't fold gep arithmetic, in general. However, the constant folder run
+; from instcombine and global opt does, and can.
+
+; PLAIN: @G8 = global i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1)
+; PLAIN: @G1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1)
+; PLAIN: @F8 = global i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2)
+; PLAIN: @F1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2)
+; PLAIN: @H8 = global i8* getelementptr (i8* null, i32 -1)
+; PLAIN: @H1 = global i1* getelementptr (i1* null, i32 -1)
+; PLAIN: define i8* @goo8() nounwind {
+; PLAIN: ret i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1)
+; PLAIN: }
+; PLAIN: define i1* @goo1() nounwind {
+; PLAIN: ret i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1)
+; PLAIN: }
+; PLAIN: define i8* @foo8() nounwind {
+; PLAIN: ret i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2)
+; PLAIN: }
+; PLAIN: define i1* @foo1() nounwind {
+; PLAIN: ret i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2)
+; PLAIN: }
+; PLAIN: define i8* @hoo8() nounwind {
+; PLAIN: ret i8* getelementptr (i8* null, i32 -1)
+; PLAIN: }
+; PLAIN: define i1* @hoo1() nounwind {
+; PLAIN: ret i1* getelementptr (i1* null, i32 -1)
+; PLAIN: }
+
+; OPT: @G8 = global i8* null
+; OPT: @G1 = global i1* null
+; OPT: @F8 = global i8* inttoptr (i64 -1 to i8*)
+; OPT: @F1 = global i1* inttoptr (i64 -1 to i1*)
+; OPT: @H8 = global i8* inttoptr (i64 -1 to i8*)
+; OPT: @H1 = global i1* inttoptr (i64 -1 to i1*)
+; OPT: define i8* @goo8() nounwind {
+; OPT: ret i8* null
+; OPT: }
+; OPT: define i1* @goo1() nounwind {
+; OPT: ret i1* null
+; OPT: }
+; OPT: define i8* @foo8() nounwind {
+; OPT: ret i8* inttoptr (i64 -1 to i8*)
+; OPT: }
+; OPT: define i1* @foo1() nounwind {
+; OPT: ret i1* inttoptr (i64 -1 to i1*)
+; OPT: }
+; OPT: define i8* @hoo8() nounwind {
+; OPT: ret i8* inttoptr (i64 -1 to i8*)
+; OPT: }
+; OPT: define i1* @hoo1() nounwind {
+; OPT: ret i1* inttoptr (i64 -1 to i1*)
+; OPT: }
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64"
+
+@G8 = global i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1)
+@G1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1)
+@F8 = global i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2)
+@F1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2)
+@H8 = global i8* getelementptr (i8* inttoptr (i32 0 to i8*), i32 -1)
+@H1 = global i1* getelementptr (i1* inttoptr (i32 0 to i1*), i32 -1)
+
+define i8* @goo8() nounwind {
+ ret i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1)
+}
+define i1* @goo1() nounwind {
+ ret i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1)
+}
+define i8* @foo8() nounwind {
+ ret i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2)
+}
+define i1* @foo1() nounwind {
+ ret i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2)
+}
+define i8* @hoo8() nounwind {
+ ret i8* getelementptr (i8* inttoptr (i32 0 to i8*), i32 -1)
+}
+define i1* @hoo1() nounwind {
+ ret i1* getelementptr (i1* inttoptr (i32 0 to i1*), i32 -1)
+}