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| author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-07-11 08:59:12 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-07-11 08:59:12 +0000 |
| commit | 84f54a3bc9067cf9b48584d3da4e71049c490cac (patch) | |
| tree | 10ea4c3bb4f265144293fc2918b51d04faa0ce48 /llvm/test/CodeGen/SystemZ/cmpxchg-01.ll | |
| parent | c8a53795ab3463d29950f25f6b91860ef43c502b (diff) | |
| download | bcm5719-llvm-84f54a3bc9067cf9b48584d3da4e71049c490cac.tar.gz bcm5719-llvm-84f54a3bc9067cf9b48584d3da4e71049c490cac.zip | |
[SystemZ] Use zeroing form of RISBG for some AND sequences
RISBG can handle some ANDs for which no AND IMMEDIATE exists.
It also acts as a three-operand AND for some cases where an
AND IMMEDIATE could be used instead.
It might be worth adding a pass to replace RISBG with AND IMMEDIATE
in cases where the register operands end up being the same and where
AND IMMEDIATE is smaller.
llvm-svn: 186072
Diffstat (limited to 'llvm/test/CodeGen/SystemZ/cmpxchg-01.ll')
| -rw-r--r-- | llvm/test/CodeGen/SystemZ/cmpxchg-01.ll | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/llvm/test/CodeGen/SystemZ/cmpxchg-01.ll b/llvm/test/CodeGen/SystemZ/cmpxchg-01.ll index 03fabee1328..bbb0aabb07e 100644 --- a/llvm/test/CodeGen/SystemZ/cmpxchg-01.ll +++ b/llvm/test/CodeGen/SystemZ/cmpxchg-01.ll @@ -12,16 +12,16 @@ ; which shift %r3 left so that %b is at the high end of the word). define i8 @f1(i8 %dummy, i8 *%src, i8 %cmp, i8 %swap) { ; CHECK-MAIN: f1: -; CHECK-MAIN: sllg [[SHIFT:%r[1-9]+]], %r3, 3 -; CHECK-MAIN: nill %r3, 65532 -; CHECK-MAIN: l [[OLD:%r[0-9]+]], 0(%r3) +; CHECK-MAIN-DAG: sllg [[SHIFT:%r[1-9]+]], %r3, 3 +; CHECK-MAIN-DAG: risbg [[BASE:%r[1-9]+]], %r3, 0, 189, 0 +; CHECK-MAIN: l [[OLD:%r[0-9]+]], 0([[BASE]]) ; CHECK-MAIN: [[LOOP:\.[^ ]*]]: ; CHECK-MAIN: rll %r2, [[OLD]], 8([[SHIFT]]) ; CHECK-MAIN: risbg %r4, %r2, 32, 55, 0 ; CHECK-MAIN: crjlh %r2, %r4, [[EXIT:\.[^ ]*]] ; CHECK-MAIN: risbg %r5, %r2, 32, 55, 0 ; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r5, -8({{%r[1-9]+}}) -; CHECK-MAIN: cs [[OLD]], [[NEW]], 0(%r3) +; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[BASE]]) ; CHECK-MAIN: jlh [[LOOP]] ; CHECK-MAIN: [[EXIT]]: ; CHECK-MAIN-NOT: %r2 |
