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86 lines
2.6 KiB
YAML
86 lines
2.6 KiB
YAML
# RUN: llc -mtriple=wasm32-unknown-unknown -run-pass wasm-fix-irreducible-control-flow %s -o - | FileCheck %s
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# This tests if we correctly create at most 2 routing blocks per entry block,
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# and also whether those routing blocks are generated in the correct place. If
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# one of the predecessor is the layout predecessor of an entry, a routing block
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# for the entry should be generated right after the layout predecessor.
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--- |
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target triple = "wasm32-unknown-unknown"
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define void @test0() {
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pred0:
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ret void
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pred1:
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ret void
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entry0:
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ret void
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entry1:
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ret void
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}
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...
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---
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# CHECK-LABEL: test0
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name: test0
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liveins:
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- { reg: '$arguments' }
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body: |
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bb.0.pred0:
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successors: %bb.1, %bb.2
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liveins: $arguments
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%0:i32 = CONST_I32 100, implicit-def $arguments
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BR_IF %bb.2, %0:i32, implicit-def $arguments
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; CHECK: bb.0.pred0:
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; CHECK: %1:i32 = IMPLICIT_DEF
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; CHECK-NEXT: %0:i32 = IMPLICIT_DEF
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; CHECK: BR_IF %bb.2, %0, implicit-def $arguments
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bb.1.pred1:
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; predecessors: %bb.1
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successors: %bb.2, %bb.3
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BR_IF %bb.3, %0:i32, implicit-def $arguments
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; CHECK: bb.1.pred1:
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; CHECK: BR_IF %bb.7, %0, implicit-def $arguments
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; This falls through to bb.2, so we don't need an additional BR here
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; CHECK-NOT: BR
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; Routing block for entry0, when predecessor is outside the loop
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; This routing block is shared between the two predecessors: pred0 and pred1.
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; CHECK: bb.2:
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; CHECK: %1:i32 = CONST_I32 0, implicit-def $arguments
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; CHECK-NEXT: BR %bb.6, implicit-def $arguments
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bb.2.entry0:
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; predecessors: %bb.0, %bb.1, %bb.1
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successors: %bb.3
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BR %bb.3, implicit-def $arguments
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; CHECK: bb.3.entry0:
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; CHECK: BR %bb.4, implicit-def $arguments
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; Routing block for entry1, when predecessor is inside the loop
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; CHECK: bb.4:
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; CHECK: %1:i32 = CONST_I32 1, implicit-def $arguments
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; CHECK-NEXT: BR %bb.6, implicit-def $arguments
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bb.3.entry1:
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; predecessors: %bb.1, %bb.2
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successors: %bb.2
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BR %bb.2, implicit-def $arguments
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; CHECK: bb.5.entry1:
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; CHECK: BR %bb.8, implicit-def $arguments
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; Dispatch block
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; CHECK: bb.6:
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; CHECK: BR_TABLE_I32 %1, %bb.3, %bb.5, %bb.5, implicit-def $arguments
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; Routing block for entry1, when predecessor is outside the loop
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; CHECK: bb.7:
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; CHECK: %1:i32 = CONST_I32 1, implicit-def $arguments
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; CHECK-NEXT: BR %bb.6, implicit-def $arguments
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; Routing block for entry0, when predecessor is inside the loop
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; CHECK: bb.8:
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; CHECK: %1:i32 = CONST_I32 0, implicit-def $arguments
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; CHECK-NEXT: BR %bb.6, implicit-def $arguments
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