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| author | Duncan Sands <baldrick@free.fr> | 2008-12-10 12:30:42 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2008-12-10 12:30:42 +0000 |
| commit | ab0c578bfd1380326830180a9209df6c5be58887 (patch) | |
| tree | eeb56b1bb61377b58796a3de5af94f1bbdf1c986 /test/CodeGen/Generic/add-with-overflow-24.ll | |
| parent | 0cfe05270cd3bdc4ddc861e853d8df620e40fcc0 (diff) | |
| download | llvm-ab0c578bfd1380326830180a9209df6c5be58887.tar.gz llvm-ab0c578bfd1380326830180a9209df6c5be58887.tar.bz2 llvm-ab0c578bfd1380326830180a9209df6c5be58887.tar.xz | |
For amusement, implement SADDO, SSUBO, UADDO, USUBO
for promoted integer types, eg: i16 on ppc-32, or
i24 on any platform. Complete support for arbitrary
precision integers would require handling expanded
integer types, eg: i128, but I couldn't be bothered.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60834 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/Generic/add-with-overflow-24.ll')
| -rw-r--r-- | test/CodeGen/Generic/add-with-overflow-24.ll | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/test/CodeGen/Generic/add-with-overflow-24.ll b/test/CodeGen/Generic/add-with-overflow-24.ll new file mode 100644 index 0000000000..debdeb25af --- /dev/null +++ b/test/CodeGen/Generic/add-with-overflow-24.ll @@ -0,0 +1,42 @@ +; RUN: llvm-as < %s | llc + +@ok = internal constant [4 x i8] c"%d\0A\00" +@no = internal constant [4 x i8] c"no\0A\00" + +define i1 @func1(i24 signext %v1, i24 signext %v2) nounwind { +entry: + %t = call {i24, i1} @llvm.sadd.with.overflow.i24(i24 %v1, i24 %v2) + %sum = extractvalue {i24, i1} %t, 0 + %sum32 = sext i24 %sum to i32 + %obit = extractvalue {i24, i1} %t, 1 + br i1 %obit, label %overflow, label %normal + +normal: + %t1 = tail call i32 (i8*, ...)* @printf( i8* getelementptr ([4 x i8]* @ok, i32 0, i32 0), i32 %sum32 ) nounwind + ret i1 true + +overflow: + %t2 = tail call i32 (i8*, ...)* @printf( i8* getelementptr ([4 x i8]* @no, i32 0, i32 0) ) nounwind + ret i1 false +} + +define i1 @func2(i24 zeroext %v1, i24 zeroext %v2) nounwind { +entry: + %t = call {i24, i1} @llvm.uadd.with.overflow.i24(i24 %v1, i24 %v2) + %sum = extractvalue {i24, i1} %t, 0 + %sum32 = zext i24 %sum to i32 + %obit = extractvalue {i24, i1} %t, 1 + br i1 %obit, label %carry, label %normal + +normal: + %t1 = tail call i32 (i8*, ...)* @printf( i8* getelementptr ([4 x i8]* @ok, i32 0, i32 0), i32 %sum32 ) nounwind + ret i1 true + +carry: + %t2 = tail call i32 (i8*, ...)* @printf( i8* getelementptr ([4 x i8]* @no, i32 0, i32 0) ) nounwind + ret i1 false +} + +declare i32 @printf(i8*, ...) nounwind +declare {i24, i1} @llvm.sadd.with.overflow.i24(i24, i24) +declare {i24, i1} @llvm.uadd.with.overflow.i24(i24, i24) |