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| author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-08-23 11:27:19 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-08-23 11:27:19 +0000 |
| commit | 24e597b8c5986f4cc2d23e8145c0f04c57fae0bd (patch) | |
| tree | 7afe4da420482b37cf87fc0a6b23c8f4e14148f2 /llvm/test/CodeGen/SystemZ/int-cmp-42.ll | |
| parent | a481f5854203e81cde5bba83e3f4c9a7c321fd29 (diff) | |
| download | bcm5719-llvm-24e597b8c5986f4cc2d23e8145c0f04c57fae0bd.tar.gz bcm5719-llvm-24e597b8c5986f4cc2d23e8145c0f04c57fae0bd.zip | |
[SystemZ] Try reversing comparisons whose first operand is in memory
This allows us to make more use of the many compare reg,mem instructions.
llvm-svn: 189099
Diffstat (limited to 'llvm/test/CodeGen/SystemZ/int-cmp-42.ll')
| -rw-r--r-- | llvm/test/CodeGen/SystemZ/int-cmp-42.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/SystemZ/int-cmp-42.ll b/llvm/test/CodeGen/SystemZ/int-cmp-42.ll index 26a268dda2b..94ef0082c44 100644 --- a/llvm/test/CodeGen/SystemZ/int-cmp-42.ll +++ b/llvm/test/CodeGen/SystemZ/int-cmp-42.ll @@ -100,3 +100,22 @@ exit: %res = phi i64 [ %src1, %entry ], [ %mul, %mulb ] ret i64 %res } + +; Check the comparison can be reversed if that allows CLGFRL to be used. +define i64 @f6(i64 %src2) { +; CHECK-LABEL: f6: +; CHECK: clgfrl %r2, g +; CHECK-NEXT: jh {{\.L.*}} +; CHECK: br %r14 +entry: + %val = load i32 *@g + %src1 = zext i32 %val to i64 + %cond = icmp ult i64 %src1, %src2 + br i1 %cond, label %exit, label %mulb +mulb: + %mul = mul i64 %src2, %src2 + br label %exit +exit: + %res = phi i64 [ %src2, %entry ], [ %mul, %mulb ] + ret i64 %res +} |
