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53 lines
1.5 KiB
53 lines
1.5 KiB
4 months ago
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; RUN: llc -mtriple=thumbv7s-apple-ios8.0 -o - %s | FileCheck %s
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declare void @foo(double)
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declare i32 @llvm.arm.space(i32, i32)
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; The constpool entry used to call @foo should be directly between where we want
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; the tbb and its table. Fortunately, the flow is simple enough that we can
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; eliminate the entry calculation (ADD) and use the ADR as the base.
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;
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; I'm hoping this won't be fragile, but if it does break the most likely fix is
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; adjusting the @llvm.arm.space call slightly. If this happens too many times
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; the test should probably be removed.
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define i32 @test_jumptable_not_adjacent(i1 %tst, i32 %sw, i32 %l) {
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; CHECK-LABEL: test_jumptable_not_adjacent:
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; CHECK: vldr {{d[0-9]+}}, [[DBL_CONST:LCPI[0-9]+_[0-9]+]]
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; [...]
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; CHECK: adr.w r[[BASE:[0-9]+]], [[JUMP_TABLE:LJTI[0-9]+_[0-9]+]]
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; CHECK-NOT: r[[BASE]]
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; CHECK: [[TBB_KEY:LCPI[0-9]+_[0-9]+]]:
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; CHECK-NEXT: tbb [r[[BASE]], {{r[0-9]+}}]
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; CHECK: [[DBL_CONST]]:
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; CHECK: .long
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; CHECK: .long
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; CHECK: [[JUMP_TABLE]]:
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; CHECK: .byte (LBB{{[0-9]+}}_{{[0-9]+}}-([[TBB_KEY]]+4)
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br label %complex
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complex:
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call void @foo(double 12345.0)
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call i32 @llvm.arm.space(i32 970, i32 undef)
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switch i32 %sw, label %second [ i32 0, label %other
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i32 1, label %third
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i32 2, label %end
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i32 3, label %other ]
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second:
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ret i32 43
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third:
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ret i32 0
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other:
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call void @bar()
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unreachable
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end:
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ret i32 42
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}
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declare void @bar()
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