derek.holloway
7502bf64a4
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62 lines
1.5 KiB
YAML
62 lines
1.5 KiB
YAML
# RUN: llc -mtriple=x86_64-- -o - %s -run-pass=none -verify-machineinstrs -simplify-mir | FileCheck %s
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---
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# We shouldn't need any explicit successor lists in these examples
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# CHECK-LABEL: name: func0
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# CHECK: bb.0:
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# CHECK-NOT: successors
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# CHECK: JCC_1 %bb.1, 4, implicit undef $eflags
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# CHECK: JMP_1 %bb.3
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# CHECK: bb.1:
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# CHECK-NOT: successors
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# CHECK: bb.2:
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# CHECK-NOT: successors
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# CHECK: JCC_1 %bb.1, 4, implicit undef $eflags
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# CHECK: bb.3:
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# CHECK: RET64 undef $eax
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name: func0
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body: |
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bb.0:
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JCC_1 %bb.1, 4, implicit undef $eflags
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JMP_1 %bb.3
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bb.1:
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bb.2:
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JCC_1 %bb.1, 4, implicit undef $eflags
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bb.3:
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JCC_1 %bb.4, 4, implicit undef $eflags ; condjump+fallthrough to same block
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bb.4:
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RET64 undef $eax
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...
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---
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# Some cases that need explicit successors:
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# CHECK-LABEL: name: func1
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name: func1
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body: |
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bb.0:
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; CHECK: bb.0:
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; CHECK: successors: %bb.3, %bb.1
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successors: %bb.3, %bb.1 ; different order than operands
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JCC_1 %bb.1, 4, implicit undef $eflags
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JMP_1 %bb.3
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bb.1:
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; CHECK: bb.1:
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; CHECK: successors: %bb.2, %bb.1
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successors: %bb.2, %bb.1 ; different order (fallthrough variant)
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JCC_1 %bb.1, 4, implicit undef $eflags
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bb.2:
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; CHECK: bb.2:
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; CHECK: successors: %bb.1(0x60000000), %bb.3(0x20000000)
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successors: %bb.1(3), %bb.3(1) ; branch probabilities not normalized
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JCC_1 %bb.1, 4, implicit undef $eflags
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bb.3:
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; CHECK: bb.3:
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; CHECK: RET64 undef $eax
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RET64 undef $eax
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...
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