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author | Roman Divacky <rdivacky@FreeBSD.org> | 2010-01-23 11:09:33 +0000 |
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committer | Roman Divacky <rdivacky@FreeBSD.org> | 2010-01-23 11:09:33 +0000 |
commit | 989df958a10f0beb90b89ccadd8351cbe51d90b1 (patch) | |
tree | 74eecbae571601ec6a626a53374b1eddc7b164a5 /test/CodeGen/X86/neg-shl-add.ll | |
parent | 829000e035f46f2a227a5466e4e427a2f3cc00a9 (diff) | |
download | src-989df958a10f0beb90b89ccadd8351cbe51d90b1.tar.gz src-989df958a10f0beb90b89ccadd8351cbe51d90b1.zip |
Update LLVM to r94309.
Notes
Notes:
svn path=/vendor/llvm/dist/; revision=202878
Diffstat (limited to 'test/CodeGen/X86/neg-shl-add.ll')
-rw-r--r-- | test/CodeGen/X86/neg-shl-add.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/CodeGen/X86/neg-shl-add.ll b/test/CodeGen/X86/neg-shl-add.ll new file mode 100644 index 000000000000..7aebc383ddeb --- /dev/null +++ b/test/CodeGen/X86/neg-shl-add.ll @@ -0,0 +1,17 @@ +; RUN: llc -march=x86-64 < %s | not grep negq + +; These sequences don't need neg instructions; they can be done with +; a single shift and sub each. + +define i64 @foo(i64 %x, i64 %y, i64 %n) nounwind { + %a = sub i64 0, %y + %b = shl i64 %a, %n + %c = add i64 %b, %x + ret i64 %c +} +define i64 @boo(i64 %x, i64 %y, i64 %n) nounwind { + %a = sub i64 0, %y + %b = shl i64 %a, %n + %c = add i64 %x, %b + ret i64 %c +} |