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| author | Sanjay Patel <spatel@rotateright.com> | 2016-03-07 23:13:06 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2016-03-07 23:13:06 +0000 |
| commit | 8c84f74f3ae3664f95a2e695587ab802c49b524a (patch) | |
| tree | fde5e922f036f0a65526ff15b1008cf47cebbb2a /llvm/test/CodeGen/X86/fp-une-cmp.ll | |
| parent | 55c0dd4b263f3331a112ddd8cb4b5f9055758c86 (diff) | |
| download | bcm5719-llvm-8c84f74f3ae3664f95a2e695587ab802c49b524a.tar.gz bcm5719-llvm-8c84f74f3ae3664f95a2e695587ab802c49b524a.zip | |
[x86] add test to show missing optimization
This should make it clearer how this proposed patch:
http://reviews.llvm.org/D11393
...will change codegen.
llvm-svn: 262875
Diffstat (limited to 'llvm/test/CodeGen/X86/fp-une-cmp.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/fp-une-cmp.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/fp-une-cmp.ll b/llvm/test/CodeGen/X86/fp-une-cmp.ll index e0b8f61ff6f..9fab5c4dc83 100644 --- a/llvm/test/CodeGen/X86/fp-une-cmp.ll +++ b/llvm/test/CodeGen/X86/fp-une-cmp.ll @@ -48,3 +48,34 @@ bb2: ret double %phi } +; FIXME: With branch weights indicated, bb2 should be placed ahead of bb1. + +define double @profile_metadata(double %x, double %y) { +; CHECK-LABEL: profile_metadata: +; CHECK: # BB#0: # %entry +; CHECK-NEXT: mulsd %xmm1, %xmm0 +; CHECK-NEXT: xorpd %xmm1, %xmm1 +; CHECK-NEXT: ucomisd %xmm1, %xmm0 +; CHECK-NEXT: jne .LBB1_1 +; CHECK-NEXT: jnp .LBB1_2 +; CHECK-NEXT: .LBB1_1: # %bb1 +; CHECK-NEXT: addsd {{.*}}(%rip), %xmm0 +; CHECK-NEXT: .LBB1_2: # %bb2 +; CHECK-NEXT: retq + +entry: + %mul = fmul double %x, %y + %cmp = fcmp une double %mul, 0.000000e+00 + br i1 %cmp, label %bb1, label %bb2, !prof !1 + +bb1: + %add = fadd double %mul, -1.000000e+00 + br label %bb2 + +bb2: + %phi = phi double [ %add, %bb1 ], [ %mul, %entry ] + ret double %phi +} + +!1 = !{!"branch_weights", i32 1, i32 1000} + |
