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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30937 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -11,6 +11,25 @@ still a codesize win.
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===-------------------------------------------------------------------------===
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Compile:
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void foo(int *P) {
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if (P) *P = 0;
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}
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into:
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_foo:
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cmpwi cr0,r3,0
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beqlr cr0
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li r0,0
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stw r0,0(r3)
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blr
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This is effectively a simple form of predication.
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===-------------------------------------------------------------------------===
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Teach the .td file to pattern match PPC::BR_COND to appropriate bc variant, so
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we don't have to always run the branch selector for small functions.
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