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e684ff35db
Summary:
Both the hardware and LLVM have changed since 2012.
Now, load-based heuristic don't show big differences any more on OoO cores.
There is no notable regressons and improvements on spec2000/2006. (Cortex-A57, Core i5).
Reviewers: spatel, zansari
Differential Revision: http://reviews.llvm.org/D16836
llvm-svn: 261809
13 lines
431 B
LLVM
13 lines
431 B
LLVM
; RUN: llc -mtriple=aarch64-none-linux-gnu < %s -mcpu=cortex-a57 -aarch64-enable-early-ifcvt=false | FileCheck %s
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; Check that the select isn't expanded into a branch sequence
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; when the icmp's first operand %x0 is from load.
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define i64 @f(i64 %a, i64 %b, i64* %c, i64 %d, i64 %e) {
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; CHECK: csel
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%x0 = load i64, i64* %c
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%x1 = icmp eq i64 %x0, 0
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%x2 = select i1 %x1, i64 %a, i64 %b
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%x3 = add i64 %x2, %d
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ret i64 %x3
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}
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