https://github.com/c8ef created https://github.com/llvm/llvm-project/pull/112539
None
>From dfa1585af3f080987cbd15830c45c34bfecc1fca Mon Sep 17 00:00:00 2001
From: c8ef <c...@outlook.com>
Date: Wed, 16 Oct 2024 01:18:13 +0000
Subject: [PATCH 1/8] implement constexpr builtin {l}abs
---
clang/include/clang/Basic/Builtins.td | 1 +
clang/lib/AST/ExprConstant.cpp | 11 +++++++++++
clang/test/AST/ByteCode/builtin-functions.cpp | 9 +++++++++
3 files changed, 21 insertions(+)
diff --git a/clang/include/clang/Basic/Builtins.td
b/clang/include/clang/Basic/Builtins.td
index bda8a48be92bda..e1b4d5b1fdc0a5 100644
--- a/clang/include/clang/Basic/Builtins.td
+++ b/clang/include/clang/Basic/Builtins.td
@@ -2714,6 +2714,7 @@ def Abs : IntMathTemplate, LibBuiltin<"stdlib.h"> {
let Attributes = [NoThrow, Const];
let Prototype = "T(T)";
let AddBuiltinPrefixedAlias = 1;
+ let OnlyBuiltinPrefixedAliasIsConstexpr = 1;
}
def Calloc : LibBuiltin<"stdlib.h"> {
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 52a7f5778ce6d2..69539a7f03feba 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -13055,6 +13055,17 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const
CallExpr *E,
return Success(Val.popcount() % 2, E);
}
+ case Builtin::BI__builtin_abs:
+ case Builtin::BI__builtin_labs:
+ case Builtin::BI__builtin_llabs: {
+ APSInt Val;
+ if (!EvaluateInteger(E->getArg(0), Val, Info))
+ return false;
+ if (Val.isNegative())
+ Val.negate();
+ return Success(Val, E);
+ }
+
case Builtin::BI__builtin_popcount:
case Builtin::BI__builtin_popcountl:
case Builtin::BI__builtin_popcountll:
diff --git a/clang/test/AST/ByteCode/builtin-functions.cpp
b/clang/test/AST/ByteCode/builtin-functions.cpp
index 450ff5671314db..46e5b0579bd575 100644
--- a/clang/test/AST/ByteCode/builtin-functions.cpp
+++ b/clang/test/AST/ByteCode/builtin-functions.cpp
@@ -265,6 +265,15 @@ namespace fpclassify {
char classify_subnorm [__builtin_fpclassify(-1, -1, -1, +1, -1, 1.0e-38f)];
}
+namespace abs {
+static_assert(__builtin_abs(14) == 14, "");
+static_assert(__builtin_labs(14L) == 14L, "");
+static_assert(__builtin_llabs(14LL) == 14LL, "");
+static_assert(__builtin_abs(-14) == 14, "");
+static_assert(__builtin_labs(-14L) == 14L, "");
+static_assert(__builtin_llabs(-14LL) == 14LL, "");
+} // namespace abs
+
namespace fabs {
static_assert(__builtin_fabs(-14.0) == 14.0, "");
}
>From 52e1d070b392ea4651acf5f7f984a1defb035459 Mon Sep 17 00:00:00 2001
From: c8ef <c...@outlook.com>
Date: Wed, 16 Oct 2024 12:32:37 +0800
Subject: [PATCH 2/8] Update InterpBuiltin.cpp
---
clang/lib/AST/ByteCode/InterpBuiltin.cpp | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
index 65c7b4e5306d72..1e1a75e5514aec 100644
--- a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
+++ b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
@@ -563,6 +563,17 @@ static bool interp__builtin_fabs(InterpState &S, CodePtr
OpPC,
return true;
}
+static bool interp__builtin_abs(InterpState &S, CodePtr OpPC,
+ const InterpFrame *Frame, const Function *Func,
+ const CallExpr *Call) {
+ PrimType ArgT = *S.getContext().classify(Call->getArg(0)->getType());
+ APSInt Val = peekToAPSInt(S.Stk, ArgT);
+ if (Val.isNegative())
+ Val.negate();
+ pushInteger(S, Val, Call->getType());
+ return true;
+}
+
static bool interp__builtin_popcount(InterpState &S, CodePtr OpPC,
const InterpFrame *Frame,
const Function *Func,
@@ -1808,6 +1819,13 @@ bool InterpretBuiltin(InterpState &S, CodePtr OpPC,
const Function *F,
return false;
break;
+ case Builtin::BI__builtin_abs:
+ case Builtin::BI__builtin_labs:
+ case Builtin::BI__builtin_llabs:
+ if (!interp__builtin_abs(S, OpPC, Frame, F, Call))
+ return false;
+ break;
+
case Builtin::BI__builtin_popcount:
case Builtin::BI__builtin_popcountl:
case Builtin::BI__builtin_popcountll:
>From 227193529178a1c1484c0da42a06289a26c75114 Mon Sep 17 00:00:00 2001
From: c8ef <c...@outlook.com>
Date: Wed, 16 Oct 2024 12:33:29 +0800
Subject: [PATCH 3/8] Update ExprConstant.cpp
---
clang/lib/AST/ExprConstant.cpp | 11 -----------
1 file changed, 11 deletions(-)
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 69539a7f03feba..52a7f5778ce6d2 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -13055,17 +13055,6 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const
CallExpr *E,
return Success(Val.popcount() % 2, E);
}
- case Builtin::BI__builtin_abs:
- case Builtin::BI__builtin_labs:
- case Builtin::BI__builtin_llabs: {
- APSInt Val;
- if (!EvaluateInteger(E->getArg(0), Val, Info))
- return false;
- if (Val.isNegative())
- Val.negate();
- return Success(Val, E);
- }
-
case Builtin::BI__builtin_popcount:
case Builtin::BI__builtin_popcountl:
case Builtin::BI__builtin_popcountll:
>From 5f45e1feba15266662ce171366c0450c86b58b64 Mon Sep 17 00:00:00 2001
From: c8ef <c...@outlook.com>
Date: Wed, 16 Oct 2024 12:38:09 +0800
Subject: [PATCH 4/8] Update InterpBuiltin.cpp
---
clang/lib/AST/ByteCode/InterpBuiltin.cpp | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
index 1e1a75e5514aec..8a27658d7fb6a4 100644
--- a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
+++ b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
@@ -1822,9 +1822,9 @@ bool InterpretBuiltin(InterpState &S, CodePtr OpPC, const
Function *F,
case Builtin::BI__builtin_abs:
case Builtin::BI__builtin_labs:
case Builtin::BI__builtin_llabs:
- if (!interp__builtin_abs(S, OpPC, Frame, F, Call))
- return false;
- break;
+ if (!interp__builtin_abs(S, OpPC, Frame, F, Call))
+ return false;
+ break;
case Builtin::BI__builtin_popcount:
case Builtin::BI__builtin_popcountl:
>From 05b6cd41661c347ef9932dcb651851ef95e67379 Mon Sep 17 00:00:00 2001
From: c8ef <c...@outlook.com>
Date: Wed, 16 Oct 2024 13:55:34 +0800
Subject: [PATCH 5/8] Update ExprConstant.cpp
---
clang/lib/AST/ExprConstant.cpp | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 52a7f5778ce6d2..69539a7f03feba 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -13055,6 +13055,17 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const
CallExpr *E,
return Success(Val.popcount() % 2, E);
}
+ case Builtin::BI__builtin_abs:
+ case Builtin::BI__builtin_labs:
+ case Builtin::BI__builtin_llabs: {
+ APSInt Val;
+ if (!EvaluateInteger(E->getArg(0), Val, Info))
+ return false;
+ if (Val.isNegative())
+ Val.negate();
+ return Success(Val, E);
+ }
+
case Builtin::BI__builtin_popcount:
case Builtin::BI__builtin_popcountl:
case Builtin::BI__builtin_popcountll:
>From 12e545f87482a2965804057eda3821e5946be4b8 Mon Sep 17 00:00:00 2001
From: c8ef <c...@outlook.com>
Date: Wed, 16 Oct 2024 18:10:48 +0800
Subject: [PATCH 6/8] Update ExprConstant.cpp
---
clang/lib/AST/ExprConstant.cpp | 2 ++
1 file changed, 2 insertions(+)
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 69539a7f03feba..256bc7454e5f46 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -13061,6 +13061,8 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const
CallExpr *E,
APSInt Val;
if (!EvaluateInteger(E->getArg(0), Val, Info))
return false;
+ if (Val == APSInt::getSignedMinValue(Val.getBitWidth()))
+ return false;
if (Val.isNegative())
Val.negate();
return Success(Val, E);
>From 0adef1074cc3982fdef4166b4913fd57858ea09d Mon Sep 17 00:00:00 2001
From: c8ef <c...@outlook.com>
Date: Wed, 16 Oct 2024 18:23:36 +0800
Subject: [PATCH 7/8] Update ExprConstant.cpp
---
clang/lib/AST/ExprConstant.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 256bc7454e5f46..d1d6790e152527 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -13061,7 +13061,7 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const
CallExpr *E,
APSInt Val;
if (!EvaluateInteger(E->getArg(0), Val, Info))
return false;
- if (Val == APSInt::getSignedMinValue(Val.getBitWidth()))
+ if (Val == APSInt(APSInt::getSignedMinValue(Val.getBitWidth()), false))
return false;
if (Val.isNegative())
Val.negate();
>From 7881253f5e1d4936473ac158d00156007919f8f1 Mon Sep 17 00:00:00 2001
From: c8ef <c...@outlook.com>
Date: Wed, 16 Oct 2024 13:13:17 +0000
Subject: [PATCH 8/8] abs
---
clang/lib/AST/ByteCode/InterpBuiltin.cpp | 2 ++
clang/test/AST/ByteCode/builtin-functions.cpp | 4 ++--
clang/test/CodeGenCXX/builtins.cpp | 14 ++++++--------
3 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
index 8a27658d7fb6a4..b4ab744ea14104 100644
--- a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
+++ b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
@@ -568,6 +568,8 @@ static bool interp__builtin_abs(InterpState &S, CodePtr
OpPC,
const CallExpr *Call) {
PrimType ArgT = *S.getContext().classify(Call->getArg(0)->getType());
APSInt Val = peekToAPSInt(S.Stk, ArgT);
+ if (Val == APSInt(APSInt::getSignedMinValue(Val.getBitWidth()), false))
+ return false;
if (Val.isNegative())
Val.negate();
pushInteger(S, Val, Call->getType());
diff --git a/clang/test/AST/ByteCode/builtin-functions.cpp
b/clang/test/AST/ByteCode/builtin-functions.cpp
index 46e5b0579bd575..1ec9b5fdcbd228 100644
--- a/clang/test/AST/ByteCode/builtin-functions.cpp
+++ b/clang/test/AST/ByteCode/builtin-functions.cpp
@@ -270,8 +270,8 @@ static_assert(__builtin_abs(14) == 14, "");
static_assert(__builtin_labs(14L) == 14L, "");
static_assert(__builtin_llabs(14LL) == 14LL, "");
static_assert(__builtin_abs(-14) == 14, "");
-static_assert(__builtin_labs(-14L) == 14L, "");
-static_assert(__builtin_llabs(-14LL) == 14LL, "");
+static_assert(__builtin_labs(-0x14L) == 0x14L, "");
+static_assert(__builtin_llabs(-0x141414141414LL) == 0x141414141414LL, "");
} // namespace abs
namespace fabs {
diff --git a/clang/test/CodeGenCXX/builtins.cpp
b/clang/test/CodeGenCXX/builtins.cpp
index 90265186fb3d8c..37f9491d12d04b 100644
--- a/clang/test/CodeGenCXX/builtins.cpp
+++ b/clang/test/CodeGenCXX/builtins.cpp
@@ -14,6 +14,12 @@ int o = X::__builtin_fabs(-2.0);
long p = X::__builtin_fabsf(-3.0f);
// CHECK: @p ={{.*}} global i64 3, align 8
+int x = __builtin_abs(-2);
+// CHECK: @x ={{.*}} global i32 2, align 4
+
+long y = __builtin_abs(-2l);
+// CHECK: @y ={{.*}} global i64 2, align 8
+
// PR8839
extern "C" char memmove();
@@ -52,14 +58,6 @@ extern "C" int __builtin_abs(int); // #1
long __builtin_abs(long); // #2
extern "C" int __builtin_abs(int); // #3
-int x = __builtin_abs(-2);
-// CHECK: [[X:%.+]] = call i32 @llvm.abs.i32(i32 -2, i1 true)
-// CHECK-NEXT: store i32 [[X]], ptr @x, align 4
-
-long y = __builtin_abs(-2l);
-// CHECK: [[Y:%.+]] = call noundef i64 @_Z13__builtin_absl(i64 noundef -2)
-// CHECK: store i64 [[Y]], ptr @y, align 8
-
extern const char char_memchr_arg[32];
char *memchr_result = __builtin_char_memchr(char_memchr_arg, 123, 32);
// CHECK: call ptr @memchr(ptr noundef @char_memchr_arg, i32 noundef 123, i64
noundef 32)
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