derek.holloway
7502bf64a4
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47 lines
1.6 KiB
LLVM
47 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=gvn -S | FileCheck %s
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; This test checks that we don't hang trying to split a critical edge in scalar
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; PRE when the control flow uses a callbr instruction.
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define void @wombat(i64 %arg, ptr %arg1, i64 %arg2, ptr %arg3) {
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; CHECK-LABEL: @wombat(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: [[TMP5:%.*]] = or i64 [[ARG2:%.*]], [[ARG:%.*]]
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; CHECK-NEXT: callbr void asm sideeffect "", "!i,!i"()
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; CHECK-NEXT: to label [[BB6:%.*]] [label [[BB7:%.*]], label %bb.bb9_crit_edge]
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; CHECK: bb.bb9_crit_edge:
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; CHECK-NEXT: [[DOTPRE:%.*]] = trunc i64 [[TMP5]] to i32
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; CHECK-NEXT: br label [[BB9:%.*]]
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; CHECK: bb6:
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; CHECK-NEXT: br label [[BB7]]
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; CHECK: bb7:
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; CHECK-NEXT: [[TMP8:%.*]] = trunc i64 [[TMP5]] to i32
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; CHECK-NEXT: tail call void @barney(i32 [[TMP8]])
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; CHECK-NEXT: br label [[BB9]]
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; CHECK: bb9:
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; CHECK-NEXT: [[TMP10_PRE_PHI:%.*]] = phi i32 [ [[DOTPRE]], [[BB_BB9_CRIT_EDGE:%.*]] ], [ [[TMP8]], [[BB7]] ]
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; CHECK-NEXT: store i32 [[TMP10_PRE_PHI]], ptr [[ARG3:%.*]], align 4
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; CHECK-NEXT: ret void
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;
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bb:
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%tmp5 = or i64 %arg2, %arg
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callbr void asm sideeffect "", "!i,!i"()
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to label %bb6 [label %bb7, label %bb9]
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bb6: ; preds = %bb
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br label %bb7
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bb7: ; preds = %bb6, %bb
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%tmp8 = trunc i64 %tmp5 to i32
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tail call void @barney(i32 %tmp8)
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br label %bb9
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bb9: ; preds = %bb7, %bb
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%tmp10 = trunc i64 %tmp5 to i32
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store i32 %tmp10, ptr %arg3
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ret void
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}
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declare void @barney(i32)
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