derek.holloway
7502bf64a4
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49 lines
1.6 KiB
LLVM
49 lines
1.6 KiB
LLVM
; RUN: llc -O0 -mtriple=aarch64-linux-gnu -global-isel -stop-after=irtranslator %s -o - | FileCheck %s
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; Test that the GlobalISel IRTranslator correctly marks blocks as address-taken
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; based on whether the BlockAddress actually has users.
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; CHECK-LABEL: name: test_indirectbr_blockaddress
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; CHECK: G_BLOCK_ADDR blockaddress(@test_indirectbr_blockaddress, %ir-block.target)
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; CHECK: G_BLOCK_ADDR blockaddress(@test_indirectbr_blockaddress, %ir-block.other)
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; CHECK: G_BRINDIRECT
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; CHECK: bb.{{[0-9]+}}.target (ir-block-address-taken %ir-block.target):
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; CHECK: bb.{{[0-9]+}}.other (ir-block-address-taken %ir-block.other):
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define i32 @test_indirectbr_blockaddress(i32 %idx) {
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entry:
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%targets = alloca [2 x ptr], align 8
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%ptr0 = getelementptr [2 x ptr], ptr %targets, i64 0, i64 0
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store ptr blockaddress(@test_indirectbr_blockaddress, %target), ptr %ptr0, align 8
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%ptr1 = getelementptr [2 x ptr], ptr %targets, i64 0, i64 1
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store ptr blockaddress(@test_indirectbr_blockaddress, %other), ptr %ptr1, align 8
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%idx64 = zext i32 %idx to i64
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%selected = getelementptr [2 x ptr], ptr %targets, i64 0, i64 %idx64
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%dest = load ptr, ptr %selected, align 8
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indirectbr ptr %dest, [label %target, label %other]
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target:
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ret i32 42
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other:
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ret i32 -1
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}
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; normal conditional branch (no blockaddress).
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; blocks should NOT be marked as address-taken.
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; CHECK-LABEL: name: test_normal_branch
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; CHECK: bb.{{[0-9]+}}.target:
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; CHECK-NOT: ir-block-address-taken
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; CHECK: bb.{{[0-9]+}}.other:
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; CHECK-NOT: ir-block-address-taken
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define i32 @test_normal_branch(i1 %cond) {
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entry:
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br i1 %cond, label %target, label %other
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target:
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ret i32 42
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other:
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ret i32 -1
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}
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