85 lines
2.5 KiB
LLVM
85 lines
2.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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define i1 @SwitchTest(i32 %x, i32 %y) {
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; CHECK-LABEL: define i1 @SwitchTest
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; CHECK-SAME: (i32 [[X:%.*]], i32 [[Y:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: switch i32 [[X]], label [[BB1:%.*]] [
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; CHECK-NEXT: i32 0, label [[BB2:%.*]]
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; CHECK-NEXT: i32 1, label [[BB3:%.*]]
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; CHECK-NEXT: ]
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; CHECK: bb1:
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; CHECK-NEXT: [[TMP0:%.*]] = icmp ugt i32 [[Y]], 1
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; CHECK-NEXT: br label [[BB2]]
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; CHECK: bb2:
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; CHECK-NEXT: [[PHI1:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ [[TMP0]], [[BB1]] ]
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: [[PHI2:%.*]] = phi i1 [ [[PHI1]], [[BB2]] ], [ false, [[ENTRY]] ]
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; CHECK-NEXT: ret i1 [[PHI2]]
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;
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entry:
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switch i32 %x, label %bb1 [
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i32 0, label %bb2
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i32 1, label %bb3
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]
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bb1:
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br label %bb2
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bb2:
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%phi1 = phi i32 [ 1, %entry ], [ %y, %bb1 ]
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br label %bb3
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bb3:
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%phi2 = phi i32 [ %phi1, %bb2 ], [ 0, %entry ]
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%cmp = icmp ugt i32 %phi2, 1
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ret i1 %cmp
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}
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; Test case derived from:
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; llvm-test-suite/MultiSource/Benchmarks/MiBench/consumer-typeset/z10.c
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define i1 @BranchTest(i1 %c, i1 %c1, i1 %c2, i1 %c3, i1 %c4) {
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; CHECK-LABEL: define i1 @BranchTest
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; CHECK-SAME: (i1 [[C:%.*]], i1 [[C1:%.*]], i1 [[C2:%.*]], i1 [[C3:%.*]], i1 [[C4:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[C]], label [[SW_EPILOG:%.*]], label [[COND_FALSE:%.*]]
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; CHECK: cond.false:
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; CHECK-NEXT: br i1 [[C1]], label [[SW_EPILOG]], label [[COND_FALSE2:%.*]]
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; CHECK: cond.false2:
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; CHECK-NEXT: br i1 [[C2]], label [[SW_EPILOG]], label [[COND_FALSE3:%.*]]
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; CHECK: cond.false3:
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; CHECK-NEXT: br i1 [[C3]], label [[SW_BB:%.*]], label [[COND_END:%.*]]
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; CHECK: cond.end:
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; CHECK-NEXT: br label [[SW_BB]]
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; CHECK: sw.bb:
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; CHECK-NEXT: br label [[SW_EPILOG]]
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; CHECK: sw.epilog:
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; CHECK-NEXT: ret i1 [[C]]
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;
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entry:
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br i1 %c, label %sw.epilog, label %cond.false
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cond.false:
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br i1 %c1, label %sw.epilog, label %cond.false2
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cond.false2:
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br i1 %c2, label %sw.epilog, label %cond.false3
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cond.false3:
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br i1 %c3, label %sw.bb, label %cond.end
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cond.end:
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%cond = select i1 %c4, i32 127, i32 126
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br label %sw.bb
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sw.bb:
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%cond2 = phi i32 [ %cond, %cond.end ], [ 128, %cond.false3 ]
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br label %sw.epilog
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sw.epilog:
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%cond3 = phi i32 [ %cond2, %sw.bb ], [ 134, %cond.false2 ], [ 2, %cond.false ], [ 1, %entry ]
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%cmp = icmp ult i32 %cond3, 2
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ret i1 %cmp
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}
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