diff options
author | Jim Grosbach <grosbach@apple.com> | 2010-07-17 03:30:54 +0000 |
---|---|---|
committer | Jim Grosbach <grosbach@apple.com> | 2010-07-17 03:30:54 +0000 |
commit | 5423856e44a7e4b173af211b0fb0675c44945a58 (patch) | |
tree | bac56b6c0151d1328703beccdcf5e0b34618d6a6 /test/CodeGen/Thumb2/bfi.ll | |
parent | 879259faa3b24015949f3a3614ce348a7c20e422 (diff) | |
download | llvm-5423856e44a7e4b173af211b0fb0675c44945a58.tar.gz llvm-5423856e44a7e4b173af211b0fb0675c44945a58.tar.bz2 llvm-5423856e44a7e4b173af211b0fb0675c44945a58.tar.xz |
Add combiner patterns to more effectively utilize the BFI (bitfield insert)
instruction for non-constant operands. This includes the case referenced
in the README.txt regarding a bitfield copy.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108608 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/Thumb2/bfi.ll')
-rw-r--r-- | test/CodeGen/Thumb2/bfi.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/CodeGen/Thumb2/bfi.ll b/test/CodeGen/Thumb2/bfi.ll index a256d67800..22473bb35a 100644 --- a/test/CodeGen/Thumb2/bfi.ll +++ b/test/CodeGen/Thumb2/bfi.ll @@ -15,3 +15,26 @@ entry: store i32 %2, i32* bitcast (%struct.F* @X to i32*), align 4 ret void } + +define i32 @f2(i32 %A, i32 %B) nounwind readnone optsize { +entry: +; CHECK: f2 +; CHECK: lsrs r1, r1, #7 +; CHECK: bfi r0, r1, #7, #16 + %and = and i32 %A, -8388481 ; <i32> [#uses=1] + %and2 = and i32 %B, 8388480 ; <i32> [#uses=1] + %or = or i32 %and2, %and ; <i32> [#uses=1] + ret i32 %or +} + +define i32 @f3(i32 %A, i32 %B) nounwind readnone optsize { +entry: +; CHECK: f3 +; CHECK: lsrs r2, r0, #7 +; CHECK: mov r0, r1 +; CHECK: bfi r0, r2, #7, #16 + %and = and i32 %A, 8388480 ; <i32> [#uses=1] + %and2 = and i32 %B, -8388481 ; <i32> [#uses=1] + %or = or i32 %and2, %and ; <i32> [#uses=1] + ret i32 %or +} |