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author | Carlo Zancanaro <carlo@pc-4w14-0.cs.usyd.edu.au> | 2012-10-15 17:10:06 +1100 |
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committer | Carlo Zancanaro <carlo@pc-4w14-0.cs.usyd.edu.au> | 2012-10-15 17:10:06 +1100 |
commit | be1de4be954c80875ad4108e0a33e8e131b2f2c0 (patch) | |
tree | 1fbbecf276bf7c7bdcbb4dd446099d6d90eaa516 /clang/test/CodeGen/integer-overflow.c | |
parent | c4626a62754862d20b41e8a46a3574264ea80e6d (diff) | |
parent | f1bd2e48c5324d3f7cda4090c87f8a5b6f463ce2 (diff) |
Merge branch 'master' of ssh://bitbucket.org/czan/honours
Diffstat (limited to 'clang/test/CodeGen/integer-overflow.c')
-rw-r--r-- | clang/test/CodeGen/integer-overflow.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/clang/test/CodeGen/integer-overflow.c b/clang/test/CodeGen/integer-overflow.c new file mode 100644 index 0000000..1d46065 --- /dev/null +++ b/clang/test/CodeGen/integer-overflow.c @@ -0,0 +1,66 @@ +// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s --check-prefix=DEFAULT +// RUN: %clang_cc1 %s -emit-llvm -o - -fwrapv | FileCheck %s --check-prefix=WRAPV +// RUN: %clang_cc1 %s -emit-llvm -o - -ftrapv | FileCheck %s --check-prefix=TRAPV +// RUN: %clang_cc1 %s -emit-llvm -o - -ftrapv -ftrapv-handler foo | FileCheck %s --check-prefix=TRAPV_HANDLER + + +// Tests for signed integer overflow stuff. +// rdar://7432000 rdar://7221421 +void test1() { + // DEFAULT: define void @test1 + // WRAPV: define void @test1 + // TRAPV: define void @test1 + extern volatile int f11G, a, b; + + // DEFAULT: add nsw i32 + // WRAPV: add i32 + // TRAPV: llvm.sadd.with.overflow.i32 + // TRAPV_HANDLER: foo( + f11G = a + b; + + // DEFAULT: sub nsw i32 + // WRAPV: sub i32 + // TRAPV: llvm.ssub.with.overflow.i32 + // TRAPV_HANDLER: foo( + f11G = a - b; + + // DEFAULT: mul nsw i32 + // WRAPV: mul i32 + // TRAPV: llvm.smul.with.overflow.i32 + // TRAPV_HANDLER: foo( + f11G = a * b; + + // DEFAULT: sub nsw i32 0, + // WRAPV: sub i32 0, + // TRAPV: llvm.ssub.with.overflow.i32(i32 0 + // TRAPV_HANDLER: foo( + f11G = -a; + + // PR7426 - Overflow checking for increments. + + // DEFAULT: add nsw i32 {{.*}}, 1 + // WRAPV: add i32 {{.*}}, 1 + // TRAPV: llvm.sadd.with.overflow.i32({{.*}}, i32 1) + // TRAPV_HANDLER: foo( + ++a; + + // DEFAULT: add nsw i32 {{.*}}, -1 + // WRAPV: add i32 {{.*}}, -1 + // TRAPV: llvm.sadd.with.overflow.i32({{.*}}, i32 -1) + // TRAPV_HANDLER: foo( + --a; + + // -fwrapv should turn off inbounds for GEP's, PR9256 + extern int* P; + ++P; + // DEFAULT: getelementptr inbounds i32* + // WRAPV: getelementptr i32* + // TRAPV: getelementptr inbounds i32* + + // PR9350: char increment never overflows. + extern volatile signed char PR9350; + // DEFAULT: add i8 {{.*}}, 1 + // WRAPV: add i8 {{.*}}, 1 + // TRAPV: add i8 {{.*}}, 1 + ++PR9350; +} |