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https://github.com/c64scene-ar/llvm-6502.git
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d0ba2a9c14
_test:
movl %edi, %eax
ret
instead of:
_test:
movl $4294967295, %ecx
movq %rdi, %rax
andq %rcx, %rax
ret
It would be great to write this as a Pat pattern that used subregs
instead of a 'pseudo' instruction, but I don't know how to do that
in td files.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47658 91177308-0d34-0410-b5e6-96231b3b80d8
13 lines
424 B
LLVM
13 lines
424 B
LLVM
; RUN: llvm-as < %s | llc | grep {movl.*%edi, %eax}
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; This should be a single mov, not a load of immediate + andq.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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target triple = "x86_64-apple-darwin8"
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define i64 @test(i64 %x) nounwind {
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entry:
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%tmp123 = and i64 %x, 4294967295 ; <i64> [#uses=1]
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ret i64 %tmp123
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}
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