diff options
| author | Chandler Carruth <chandlerc@gmail.com> | 2011-12-12 11:59:10 +0000 |
|---|---|---|
| committer | Chandler Carruth <chandlerc@gmail.com> | 2011-12-12 11:59:10 +0000 |
| commit | ddbc274169ed4ee0e0ac32ed194b925a180202fe (patch) | |
| tree | a15e94ed378c7e90d4b6985af905b07f82ad8a36 /test/Transforms/InstCombine/sext.ll | |
| parent | 2106badea341062643d4e11d6e9975b871fa61b9 (diff) | |
| download | llvm-ddbc274169ed4ee0e0ac32ed194b925a180202fe.tar.gz llvm-ddbc274169ed4ee0e0ac32ed194b925a180202fe.tar.bz2 llvm-ddbc274169ed4ee0e0ac32ed194b925a180202fe.tar.xz | |
Manually upgrade the test suite to specify the flag to cttz and ctlz.
I followed three heuristics for deciding whether to set 'true' or
'false':
- Everything target independent got 'true' as that is the expected
common output of the GCC builtins.
- If the target arch only has one way of implementing this operation,
set the flag in the way that exercises the most of codegen. For most
architectures this is also the likely path from a GCC builtin, with
'true' being set. It will (eventually) require lowering away that
difference, and then lowering to the architecture's operation.
- Otherwise, set the flag differently dependending on which target
operation should be tested.
Let me know if anyone has any issue with this pattern or would like
specific tests of another form. This should allow the x86 codegen to
just iteratively improve as I teach the backend how to differentiate
between the two forms, and everything else should remain exactly the
same.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146370 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/sext.ll')
| -rw-r--r-- | test/Transforms/InstCombine/sext.ll | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/test/Transforms/InstCombine/sext.ll b/test/Transforms/InstCombine/sext.ll index f49a2efb39..f1987973f4 100644 --- a/test/Transforms/InstCombine/sext.ll +++ b/test/Transforms/InstCombine/sext.ll @@ -3,8 +3,8 @@ target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" declare i32 @llvm.ctpop.i32(i32) -declare i32 @llvm.ctlz.i32(i32) -declare i32 @llvm.cttz.i32(i32) +declare i32 @llvm.ctlz.i32(i32, i1) +declare i32 @llvm.cttz.i32(i32, i1) define i64 @test1(i32 %x) { %t = call i32 @llvm.ctpop.i32(i32 %x) @@ -16,7 +16,7 @@ define i64 @test1(i32 %x) { } define i64 @test2(i32 %x) { - %t = call i32 @llvm.ctlz.i32(i32 %x) + %t = call i32 @llvm.ctlz.i32(i32 %x, i1 true) %s = sext i32 %t to i64 ret i64 %s @@ -25,7 +25,7 @@ define i64 @test2(i32 %x) { } define i64 @test3(i32 %x) { - %t = call i32 @llvm.cttz.i32(i32 %x) + %t = call i32 @llvm.cttz.i32(i32 %x, i1 true) %s = sext i32 %t to i64 ret i64 %s |