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this is an SSE-specific issue.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93373 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -916,3 +916,23 @@ cheaper to do fld1 than load from a constant pool for example, so
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"load, add 1.0, store" is better done in the fp stack, etc.
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//===---------------------------------------------------------------------===//
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The X86 backend should be able to if-convert SSE comparisons like "ucomisd" to
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"cmpsd". For example, this code:
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double d1(double x) { return x == x ? x : x + x; }
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Compiles into:
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_d1:
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ucomisd %xmm0, %xmm0
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jnp LBB1_2
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addsd %xmm0, %xmm0
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ret
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LBB1_2:
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ret
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Also, the 'ret's should be shared. This is PR6032.
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//===---------------------------------------------------------------------===//
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@ -1868,23 +1868,3 @@ carried over to machine instructions. Asm printer (or JIT) can use this
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information to add the "lock" prefix.
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//===---------------------------------------------------------------------===//
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The X86 backend should be able to if-convert SSE comparisons like "ucomisd" to
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"cmpsd". For example, this code:
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double d1(double x) { return x == x ? x : x + x; }
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Compiles into:
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_d1:
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ucomisd %xmm0, %xmm0
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jnp LBB1_2
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addsd %xmm0, %xmm0
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ret
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LBB1_2:
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ret
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Also, the 'ret's should be shared. This is PR6032.
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//===---------------------------------------------------------------------===//
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