tests_lit/llvm2ice_tests/prune_unreachable.ll - Issue 1027933002: Subzero: Prune unreachable nodes after constructing the Cfg.

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Side by Side Diff: tests_lit/llvm2ice_tests/prune_unreachable.ll

Issue 1027933002: Subzero: Prune unreachable nodes after constructing the Cfg. (Closed) Base URL: https://chromium.googlesource.com/native_client/pnacl-subzero.git@master

Patch Set: Created 5 years, 9 months ago

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	1 ; This tests that unreachable basic blocks are pruned from the CFG, so that

	2 ; liveness analysis doesn't detect inconsistencies.

	3

	4 ; RUN: %p2i -i %s --filetype=obj --disassemble --args -Om1 \| FileCheck %s

	5 ; RUN: %p2i -i %s --filetype=obj --disassemble --args -O2 \| FileCheck %s

	6

	7 declare void @abort()

	8

	9 define i32 @unreachable_block() {

	10 entry:

	11 ; ret_val has no reaching uses and so its assignment may be

	12 ; dead-code eliminated.

	13 %ret_val = add i32 undef, undef

	14 call void @abort()

	15 unreachable

	16 label:

	17 ; ret_val has no reaching definitions, causing an inconsistency in

	18 ; liveness analysis.

	19 ret i32 %ret_val

	20 }

	21

	22 ; CHECK-LABEL: unreachable_block

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