// normalized.
if (SO1->getType() != GO1->getType())
return nullptr;
+ // Only do the combine when GO1 and SO1 are both constants. Only in
+ // this case, we are sure the cost after the merge is never more than
+ // that before the merge.
+ if (!isa<Constant>(GO1) || !isa<Constant>(SO1))
+ return nullptr;
Sum = Builder->CreateAdd(SO1, GO1, PtrOp->getName()+".sum");
}
-; RUN: opt < %s -instcombine -S | FileCheck %s
-
-target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-apple-macosx10.10.0"
-
-define internal i8* @descale_zero() {
-entry:
-; CHECK: load i8*, i8** inttoptr (i64 48 to i8**), align 16
-; CHECK-NEXT: ret i8*
- %i16_ptr = load i16*, i16** inttoptr (i64 48 to i16**), align 16
- %num = load i64, i64* inttoptr (i64 64 to i64*), align 64
- %num_times_2 = shl i64 %num, 1
- %num_times_2_plus_4 = add i64 %num_times_2, 4
- %i8_ptr = bitcast i16* %i16_ptr to i8*
- %i8_ptr_num_times_2_plus_4 = getelementptr i8, i8* %i8_ptr, i64 %num_times_2_plus_4
- %num_times_neg2 = mul i64 %num, -2
- %num_times_neg2_minus_4 = add i64 %num_times_neg2, -4
- %addr = getelementptr i8, i8* %i8_ptr_num_times_2_plus_4, i64 %num_times_neg2_minus_4
- ret i8* %addr
-}
%B = getelementptr i32, i32* %A, i64 %D
ret i32* %B
; CHECK-LABEL: @test7(
-; CHECK: %A.sum = add i64 %C, %D
-; CHECK: getelementptr i32, i32* %I, i64 %A.sum
+; CHECK: %A = getelementptr i32, i32* %I, i64 %C
+; CHECK: %B = getelementptr i32, i32* %A, i64 %D
}
define i8* @test8([10 x i32]* %X) {