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| author | Evan Cheng <evan.cheng@apple.com> | 2011-01-06 01:02:44 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2011-01-06 01:02:44 +0000 |
| commit | d08e5b48bc5d9177b1d70a1980a7805420a99085 (patch) | |
| tree | eba84180bd1bb0bc4918cdce0b29604e8f4b8d9e /test/CodeGen/X86/switch-bt.ll | |
| parent | a99ec28134c2fd0a21c446a58bf6406b8aa1a580 (diff) | |
| download | llvm-d08e5b48bc5d9177b1d70a1980a7805420a99085.tar.gz llvm-d08e5b48bc5d9177b1d70a1980a7805420a99085.tar.bz2 llvm-d08e5b48bc5d9177b1d70a1980a7805420a99085.tar.xz | |
Avoid zero extend bit test operands to pointer type if all the masks fit in
the original type of the switch statement key.
rdar://8781238
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122935 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/switch-bt.ll')
| -rw-r--r-- | test/CodeGen/X86/switch-bt.ll | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/test/CodeGen/X86/switch-bt.ll b/test/CodeGen/X86/switch-bt.ll index ed3266ec42..9f491d452f 100644 --- a/test/CodeGen/X86/switch-bt.ll +++ b/test/CodeGen/X86/switch-bt.ll @@ -49,3 +49,33 @@ sw.epilog: ; preds = %sw.default, %sw.bb4 } declare void @foo(i32) + +; Don't zero extend the test operands to pointer type if it can be avoided. +; rdar://8781238 +define void @test2(i32 %x) nounwind ssp { +; CHECK: test2: +; CHECK: cmpl $6 +; CHECK: ja + +; CHECK-NEXT: movl $91 +; CHECK-NOT: movl +; CHECK-NEXT: btl +; CHECK-NEXT: jb +entry: + switch i32 %x, label %if.end [ + i32 6, label %if.then + i32 4, label %if.then + i32 3, label %if.then + i32 1, label %if.then + i32 0, label %if.then + ] + +if.then: ; preds = %entry, %entry, %entry, %entry, %entry + tail call void @bar() nounwind + ret void + +if.end: ; preds = %entry + ret void +} + +declare void @bar() |