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b162e0bc47
We currently miss the opportunities for optmizing comparisons in the peephole optimizer if the input is the result of a COPY since we look for record-form versions of the producing instruction. This patch simply lets the optimization peek through copies. Differential revision: https://reviews.llvm.org/D59633 llvm-svn: 362438
30 lines
1000 B
LLVM
30 lines
1000 B
LLVM
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=pwr8 -ppc-asm-full-reg-names < %s | FileCheck %s
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define dso_local signext i32 @func(i32 zeroext %x, i32 zeroext %y) local_unnamed_addr {
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; CHECK-LABEL: func
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; CHECK: or. {{r[0-9]+}}, r4, r3
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; CHECK-NOT: cmplwi
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; CHECK: blr
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entry:
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%or = or i32 %y, %x
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%tobool = icmp eq i32 %or, 0
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br i1 %tobool, label %if.else, label %if.then
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if.then: ; preds = %entry
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%call = tail call signext i32 bitcast (i32 (...)* @f1 to i32 ()*)()
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br label %return
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if.else: ; preds = %entry
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%call1 = tail call signext i32 bitcast (i32 (...)* @f2 to i32 ()*)()
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br label %return
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return: ; preds = %if.else, %if.then
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%retval.0 = phi i32 [ %call, %if.then ], [ %call1, %if.else ]
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ret i32 %retval.0
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}
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declare signext i32 @f1(...) local_unnamed_addr
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declare signext i32 @f2(...) local_unnamed_addr
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