66 lines
1.3 KiB
Plaintext
66 lines
1.3 KiB
Plaintext
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# RUN: llc -mtriple=armv7-apple-ios -o - %s -run-pass if-converter | FileCheck %s
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---
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name: f1
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body: |
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bb.0:
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successors: %bb.1
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B %bb.1
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bb.1:
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successors: %bb.2, %bb.4
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Bcc %bb.4, 1, $cpsr
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bb.2:
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successors: %bb.3, %bb.5
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Bcc %bb.5, 1, $cpsr
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bb.3:
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successors: %bb.5
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B %bb.5
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bb.4:
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successors:
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bb.5:
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successors: %bb.1, %bb.6
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Bcc %bb.1, 1, $cpsr
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bb.6:
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BX_RET 14, _
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...
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# IfConversion.cpp/canFallThroughTo thought there was a fallthrough from
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# bb.4 to bb5 even if the successor list was empty.
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# bb.4 is empty, so it surely looks like it can fallthrough, but this is what
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# happens for a bb just containing an "unreachable".
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#CHECK: body: |
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#CHECK: bb.0:
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#CHECK: successors: %bb.1
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#CHECK: bb.1:
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#CHECK: successors: %bb.3({{.*}}), %bb.2
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# The original brr_cond from bb.1, jumping to the empty bb
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#CHECK: Bcc %bb.2
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#CHECK: B %bb.3
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# Empty bb.2, originally containing "unreachable" and thus has no successors
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# and we cannot guess them: we should print an empty list of successors.
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#CHECK: bb.2:
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#CHECK: successors:{{ *$}}
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#CHECK: bb.3:
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#CHECK: successors: %bb.1
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# Conditional BX_RET and then loop back to bb.1
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#CHECK: BX_RET 0
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#CHECK: B %bb.1
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