#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/DebugCounter.h"
+#include "llvm/Support/KnownBits.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Transforms/Utils/ValueMapper.h"
return MergeResults(Op0, CI, true);
}
+ // Decompose or as an add if there are no common bits between the operands.
+ if (match(V, m_Or(m_Value(Op0), m_ConstantInt(CI))) &&
+ haveNoCommonBitsSet(Op0, CI, DL)) {
+ return MergeResults(Op0, CI, IsSigned);
+ }
+
if (match(V, m_NUWShl(m_Value(Op1), m_ConstantInt(CI))) && canUseSExt(CI)) {
int64_t Mult = int64_t(std::pow(int64_t(2), CI->getSExtValue()));
auto Result = decompose(Op1, Preconditions, IsSigned, DL);
; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: [[START_1:%.*]] = or i8 [[START]], 1
; CHECK-NEXT: [[T_1:%.*]] = icmp ult i8 [[START_1]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[T_1]])
+; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: [[START_2:%.*]] = or i8 [[START]], 2
; CHECK-NEXT: [[T_2:%.*]] = icmp ult i8 [[START_2]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[T_2]])
+; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: [[START_3:%.*]] = or i8 [[START]], 3
; CHECK-NEXT: [[T_3:%.*]] = icmp ult i8 [[START_3]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[T_3]])
+; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: [[START_4:%.*]] = or i8 [[START]], 4
; CHECK-NEXT: [[C_4:%.*]] = icmp ult i8 [[START_4]], [[HIGH]]
; CHECK-NEXT: call void @use(i1 [[C_4]])
; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: [[START_1:%.*]] = or i8 [[START]], 1
; CHECK-NEXT: [[T_1:%.*]] = icmp ule i8 [[START_1]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[T_1]])
+; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: [[START_2:%.*]] = or i8 [[START]], 2
; CHECK-NEXT: [[T_2:%.*]] = icmp ule i8 [[START_2]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[T_2]])
+; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: [[START_3:%.*]] = or i8 [[START]], 3
; CHECK-NEXT: [[T_3:%.*]] = icmp ule i8 [[START_3]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[T_3]])
+; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: [[START_4:%.*]] = or i8 [[START]], 4
; CHECK-NEXT: [[T_4:%.*]] = icmp ule i8 [[START_4]], [[HIGH]]
; CHECK-NEXT: call void @use(i1 [[T_4]])
; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: [[START_1:%.*]] = or i8 [[START]], 1
; CHECK-NEXT: [[F_1:%.*]] = icmp ugt i8 [[START_1]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[F_1]])
+; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: [[START_2:%.*]] = or i8 [[START]], 2
; CHECK-NEXT: [[F_2:%.*]] = icmp ugt i8 [[START_2]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[F_2]])
+; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: [[START_3:%.*]] = or i8 [[START]], 3
; CHECK-NEXT: [[F_3:%.*]] = icmp ugt i8 [[START_3]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[F_3]])
+; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: [[START_4:%.*]] = or i8 [[START]], 4
; CHECK-NEXT: [[F_4:%.*]] = icmp ugt i8 [[START_4]], [[HIGH]]
; CHECK-NEXT: call void @use(i1 [[F_4]])
; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: [[START_1:%.*]] = or i8 [[START]], 1
; CHECK-NEXT: [[F_1:%.*]] = icmp uge i8 [[START_1]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[F_1]])
+; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: [[START_2:%.*]] = or i8 [[START]], 2
; CHECK-NEXT: [[F_2:%.*]] = icmp uge i8 [[START_2]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[F_2]])
+; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: [[START_3:%.*]] = or i8 [[START]], 3
; CHECK-NEXT: [[F_3:%.*]] = icmp uge i8 [[START_3]], [[HIGH]]
-; CHECK-NEXT: call void @use(i1 [[F_3]])
+; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: [[START_4:%.*]] = or i8 [[START]], 4
; CHECK-NEXT: [[C_4:%.*]] = icmp uge i8 [[START_4]], [[HIGH]]
; CHECK-NEXT: call void @use(i1 [[C_4]])