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| author | Chris Lattner <sabre@nondot.org> | 2010-12-20 01:16:03 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-12-20 01:16:03 +0000 |
| commit | 39ffcb7b62a75d186a7f14b38aacb1615593fdbd (patch) | |
| tree | e0c8ecf39907ca5a0ffe62d2284762805c7459fa /test/CodeGen/X86/add.ll | |
| parent | b085181258bf2566e7b58389591acc213b0b2927 (diff) | |
| download | llvm-39ffcb7b62a75d186a7f14b38aacb1615593fdbd.tar.gz llvm-39ffcb7b62a75d186a7f14b38aacb1615593fdbd.tar.bz2 llvm-39ffcb7b62a75d186a7f14b38aacb1615593fdbd.tar.xz | |
We lower setb to sbb with the hope that the and will go away, when it
doesn't, match it back to setb.
On a 64-bit version of the testcase before we'd get:
movq %rdi, %rax
addq %rsi, %rax
sbbb %dl, %dl
andb $1, %dl
ret
now we get:
movq %rdi, %rax
addq %rsi, %rax
setb %dl
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122217 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/add.ll')
| -rw-r--r-- | test/CodeGen/X86/add.ll | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/test/CodeGen/X86/add.ll b/test/CodeGen/X86/add.ll index 3991a6849f..1201c06fcc 100644 --- a/test/CodeGen/X86/add.ll +++ b/test/CodeGen/X86/add.ll @@ -92,3 +92,12 @@ define i64 @test6(i64 %A, i32 %B) nounwind { ; X64: ret } +define {i32, i1} @test7(i32 %v1, i32 %v2) nounwind { + %t = call {i32, i1} @llvm.uadd.with.overflow.i32(i32 %v1, i32 %v2) + ret {i32, i1} %t +} + +; X64: test7: +; X64: addl %esi, %eax +; X64-NEXT: setb %dl +; X64-NEXT: ret |