62 lines
1.8 KiB
LLVM
62 lines
1.8 KiB
LLVM
; RUN: llc < %s -fast-isel -mtriple=i386-apple-darwin -mcpu=generic | FileCheck %s
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; RUN: llc < %s -fast-isel -mtriple=i386-apple-darwin -mcpu=atom | FileCheck -check-prefix=ATOM %s
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; RUN: llc < %s -fast-isel -fast-isel-abort=3 -mtriple=x86_64 | FileCheck -check-prefix=ELF64 %s
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@src = external dso_preemptable global i32
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; rdar://6653118
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define i32 @loadgv() nounwind {
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entry:
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%0 = load i32, ptr @src, align 4
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%1 = load i32, ptr @src, align 4
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%2 = add i32 %0, %1
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store i32 %2, ptr @src
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ret i32 %2
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; This should fold one of the loads into the add.
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; CHECK-LABEL: loadgv:
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; CHECK: movl L_src$non_lazy_ptr, %eax
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; CHECK: movl (%eax), %eax
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; CHECK: movl L_src$non_lazy_ptr, %ecx
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; CHECK: addl (%ecx), %eax
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; CHECK: movl L_src$non_lazy_ptr, %ecx
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; CHECK: movl %eax, (%ecx)
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; CHECK: ret
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; ATOM: loadgv:
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; ATOM: movl L_src$non_lazy_ptr, %eax
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; ATOM: movl (%eax), %eax
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; ATOM: movl L_src$non_lazy_ptr, %ecx
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; ATOM: addl (%ecx), %eax
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; ATOM: movl L_src$non_lazy_ptr, %ecx
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; ATOM: movl %eax, (%ecx)
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; ATOM: ret
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;; dso_preemptable src is loaded via GOT indirection.
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; ELF64-LABEL: loadgv:
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; ELF64: movq src@GOTPCREL(%rip), %rax
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; ELF64-NEXT: movl (%rax), %eax
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; ELF64-NEXT: movq src@GOTPCREL(%rip), %rcx
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; ELF64-NEXT: addl (%rcx), %eax
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; ELF64-NEXT: movq src@GOTPCREL(%rip), %rcx
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; ELF64-NEXT: movl %eax, (%rcx)
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; ELF64-NEXT: retq
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}
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%stuff = type { ptr }
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@LotsStuff = external constant [4 x ptr]
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define void @t(ptr %this) nounwind {
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entry:
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store ptr getelementptr ([4 x ptr], ptr @LotsStuff, i32 0, i32 2), ptr null, align 4
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ret void
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; CHECK: _t:
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; CHECK: xorl %eax, %eax
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; CHECK: movl L_LotsStuff$non_lazy_ptr, %ecx
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; ATOM: _t:
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; ATOM: movl L_LotsStuff$non_lazy_ptr, %e{{..}}
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; ATOM: xorl %e{{..}}, %e{{..}}
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}
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