llvm-mirror/fast-isel-load-i1.ll at c9a75c816c9da070f4e3336927ce0f02f0ea91eb - llvm-mirror - Git.je (Gitea)

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Guy Blank 4de6e44893 [X86][FastISel] Use a COPY from K register to a GPR instead of a K operation

The KORTEST was introduced due to a bug where a TEST instruction used a K register.
but, turns out that the opposite case of KORTEST using a GPR is now happening

The change removes the KORTEST flow and adds a COPY instruction from the K reg to a GPR.

Differential Revision: https://reviews.llvm.org/D24953

llvm-svn: 282580

2016-09-28 11:22:17 +00:00

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 ; RUN: llc < %s -fast-isel -mtriple=x86_64-unknown-linux-gnu -mattr=+avx512f  | FileCheck %s
 define i1 @test_i1(i1* %b) {
 ; CHECK-LABEL: test_i1:
 ; CHECK:       # BB#0: # %entry
 ; CHECK-NEXT:    testb $1, (%rdi)
 entry:
   %0 = load i1, i1* %b, align 1
   br i1 %0, label %in, label %out
 in:
   ret i1 0
 out:
   ret i1 1
 }