6cd35912c0
__builtin_frame_address requires its argument to be a constant expression which already implies that it cannot have undefined behavior. However, we used EmitScalarExpr to emit the argument causing UBSan to try to check for overflow. Instead, use the constant expression emission system. This fixes PR24256. llvm-svn: 243206
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - | FileCheck %s --check-prefix=DEFAULT
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// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - -fwrapv | FileCheck %s --check-prefix=WRAPV
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// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - -ftrapv | FileCheck %s --check-prefix=TRAPV
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// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - -fsanitize=signed-integer-overflow | FileCheck %s --check-prefix=CATCH_UB
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// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - -ftrapv -ftrapv-handler foo | FileCheck %s --check-prefix=TRAPV_HANDLER
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// Tests for signed integer overflow stuff.
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// rdar://7432000 rdar://7221421
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void test1() {
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// DEFAULT-LABEL: define void @test1
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// WRAPV-LABEL: define void @test1
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// TRAPV-LABEL: define void @test1
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extern volatile int f11G, a, b;
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// DEFAULT: add nsw i32
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// WRAPV: add i32
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// TRAPV: llvm.sadd.with.overflow.i32
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// CATCH_UB: llvm.sadd.with.overflow.i32
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// TRAPV_HANDLER: foo(
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f11G = a + b;
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// DEFAULT: sub nsw i32
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// WRAPV: sub i32
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// TRAPV: llvm.ssub.with.overflow.i32
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// CATCH_UB: llvm.ssub.with.overflow.i32
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// TRAPV_HANDLER: foo(
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f11G = a - b;
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// DEFAULT: mul nsw i32
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// WRAPV: mul i32
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// TRAPV: llvm.smul.with.overflow.i32
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// CATCH_UB: llvm.smul.with.overflow.i32
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// TRAPV_HANDLER: foo(
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f11G = a * b;
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// DEFAULT: sub nsw i32 0,
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// WRAPV: sub i32 0,
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// TRAPV: llvm.ssub.with.overflow.i32(i32 0
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// CATCH_UB: llvm.ssub.with.overflow.i32(i32 0
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// TRAPV_HANDLER: foo(
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f11G = -a;
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// PR7426 - Overflow checking for increments.
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// DEFAULT: add nsw i32 {{.*}}, 1
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// WRAPV: add i32 {{.*}}, 1
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// TRAPV: llvm.sadd.with.overflow.i32({{.*}}, i32 1)
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// CATCH_UB: llvm.sadd.with.overflow.i32({{.*}}, i32 1)
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// TRAPV_HANDLER: foo(
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++a;
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// DEFAULT: add nsw i32 {{.*}}, -1
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// WRAPV: add i32 {{.*}}, -1
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// TRAPV: llvm.ssub.with.overflow.i32({{.*}}, i32 1)
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// CATCH_UB: llvm.ssub.with.overflow.i32({{.*}}, i32 1)
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// TRAPV_HANDLER: foo(
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--a;
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// -fwrapv should turn off inbounds for GEP's, PR9256
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extern int* P;
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++P;
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// DEFAULT: getelementptr inbounds i32, i32*
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// WRAPV: getelementptr i32, i32*
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// TRAPV: getelementptr inbounds i32, i32*
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// CATCH_UB: getelementptr inbounds i32, i32*
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// PR9350: char increment never overflows.
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extern volatile signed char PR9350;
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// DEFAULT: add i8 {{.*}}, 1
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// WRAPV: add i8 {{.*}}, 1
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// TRAPV: add i8 {{.*}}, 1
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// CATCH_UB: add i8 {{.*}}, 1
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++PR9350;
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// PR24256: don't instrument __builtin_frame_address.
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__builtin_frame_address(0 + 0);
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// DEFAULT: call i8* @llvm.frameaddress(i32 0)
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// WRAPV: call i8* @llvm.frameaddress(i32 0)
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// TRAPV: call i8* @llvm.frameaddress(i32 0)
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// CATCH_UB: call i8* @llvm.frameaddress(i32 0)
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}
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