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30 lines
1.1 KiB
LLVM
30 lines
1.1 KiB
LLVM
; RUN: llc < %s -mcpu=swift -mtriple=armv7s-apple-ios | FileCheck %s
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; Check that we avoid producing vldm instructions using d registers that
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; begin in the most-significant half of a q register. These require more
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; micro-ops on swift and so aren't worth combining.
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; CHECK-LABEL: test_vldm
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; CHECK: vldmia r{{[0-9]+}}, {d2, d3, d4}
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; CHECK-NOT: vldmia r{{[0-9]+}}, {d1, d2, d3, d4}
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declare fastcc void @force_register(double %d0, double %d1, double %d2, double %d3, double %d4)
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define void @test_vldm(double* %x, double * %y) {
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entry:
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%addr1 = getelementptr double * %x, i32 1
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%addr2 = getelementptr double * %x, i32 2
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%addr3 = getelementptr double * %x, i32 3
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%d0 = load double * %y
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%d1 = load double * %x
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%d2 = load double * %addr1
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%d3 = load double * %addr2
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%d4 = load double * %addr3
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; We are trying to force x[0-3] in registers d1 to d4 so that we can test we
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; don't form a "vldmia rX, {d1, d2, d3, d4}".
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; We are relying on the calling convention and that register allocation
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; properly coalesces registers.
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call fastcc void @force_register(double %d0, double %d1, double %d2, double %d3, double %d4)
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ret void
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}
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