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| author | Dan Gohman <gohman@apple.com> | 2009-06-19 23:23:27 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-06-19 23:23:27 +0000 |
| commit | 2781f30eac8647552638246c28ab07dd0fc2c560 (patch) | |
| tree | c5cbbcf6d8cf8a222b75cf30aef9393612c72cc8 /test/CodeGen/X86/optimize-max-2.ll | |
| parent | 5090f19f090e3dc33b0bc11be60ef3781a8217e4 (diff) | |
| download | llvm-2781f30eac8647552638246c28ab07dd0fc2c560.tar.gz llvm-2781f30eac8647552638246c28ab07dd0fc2c560.tar.bz2 llvm-2781f30eac8647552638246c28ab07dd0fc2c560.tar.xz | |
Re-apply r73718, now that the fix in r73787 is in, and add a
hand-crafted testcase which demonstrates the bug that was exposed
in 254.gap.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73793 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/optimize-max-2.ll')
| -rw-r--r-- | test/CodeGen/X86/optimize-max-2.ll | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/test/CodeGen/X86/optimize-max-2.ll b/test/CodeGen/X86/optimize-max-2.ll new file mode 100644 index 0000000000..effc3fc737 --- /dev/null +++ b/test/CodeGen/X86/optimize-max-2.ll @@ -0,0 +1,30 @@ +; RUN: llvm-as < %s | llc -march=x86-64 > %t +; RUN: grep cmov %t | count 2 +; RUN: grep jne %t | count 1 + +; LSR's OptimizeMax function shouldn't try to eliminate this max, because +; it has three operands. + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" + +define void @foo(double* nocapture %p, i64 %x, i64 %y) nounwind { +entry: + %tmp = icmp eq i64 %y, 0 ; <i1> [#uses=1] + %umax = select i1 %tmp, i64 1, i64 %y ; <i64> [#uses=2] + %tmp8 = icmp ugt i64 %umax, %x ; <i1> [#uses=1] + %umax9 = select i1 %tmp8, i64 %umax, i64 %x ; <i64> [#uses=1] + br label %bb4 + +bb4: ; preds = %bb4, %entry + %i.07 = phi i64 [ 0, %entry ], [ %2, %bb4 ] ; <i64> [#uses=2] + %scevgep = getelementptr double* %p, i64 %i.07 ; <double*> [#uses=2] + %0 = load double* %scevgep, align 8 ; <double> [#uses=1] + %1 = fmul double %0, 2.000000e+00 ; <double> [#uses=1] + store double %1, double* %scevgep, align 8 + %2 = add i64 %i.07, 1 ; <i64> [#uses=2] + %exitcond = icmp eq i64 %2, %umax9 ; <i1> [#uses=1] + br i1 %exitcond, label %return, label %bb4 + +return: ; preds = %bb4 + ret void +} |