58 lines
2.2 KiB
LLVM
58 lines
2.2 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -basic-aa -gvn -enable-split-backedge-in-load-pre=true < %s | FileCheck %s --check-prefix=ON
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; RUN: opt -S -basic-aa -gvn -enable-split-backedge-in-load-pre=false < %s | FileCheck %s --check-prefix=OFF
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
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define i32 @test(i1 %b, i1 %c, i32* noalias %p, i32* noalias %q) {
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; ON-LABEL: @test(
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; ON-NEXT: entry:
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; ON-NEXT: [[Y1:%.*]] = load i32, i32* [[P:%.*]], align 4
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; ON-NEXT: call void @use(i32 [[Y1]])
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; ON-NEXT: br label [[HEADER:%.*]]
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; ON: header:
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; ON-NEXT: [[Y:%.*]] = phi i32 [ [[Y_PRE:%.*]], [[SKIP_HEADER_CRIT_EDGE:%.*]] ], [ [[Y]], [[HEADER]] ], [ [[Y1]], [[ENTRY:%.*]] ]
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; ON-NEXT: call void @use(i32 [[Y]])
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; ON-NEXT: br i1 [[B:%.*]], label [[SKIP:%.*]], label [[HEADER]]
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; ON: skip:
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; ON-NEXT: call void @clobber(i32* [[P]], i32* [[Q:%.*]])
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; ON-NEXT: br i1 [[C:%.*]], label [[SKIP_HEADER_CRIT_EDGE]], label [[EXIT:%.*]]
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; ON: skip.header_crit_edge:
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; ON-NEXT: [[Y_PRE]] = load i32, i32* [[P]], align 4
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; ON-NEXT: br label [[HEADER]]
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; ON: exit:
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; ON-NEXT: ret i32 [[Y]]
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;
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; OFF-LABEL: @test(
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; OFF-NEXT: entry:
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; OFF-NEXT: [[Y1:%.*]] = load i32, i32* [[P:%.*]], align 4
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; OFF-NEXT: call void @use(i32 [[Y1]])
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; OFF-NEXT: br label [[HEADER:%.*]]
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; OFF: header:
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; OFF-NEXT: [[Y:%.*]] = load i32, i32* [[P]], align 4
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; OFF-NEXT: call void @use(i32 [[Y]])
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; OFF-NEXT: br i1 [[B:%.*]], label [[SKIP:%.*]], label [[HEADER]]
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; OFF: skip:
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; OFF-NEXT: call void @clobber(i32* [[P]], i32* [[Q:%.*]])
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; OFF-NEXT: br i1 [[C:%.*]], label [[HEADER]], label [[EXIT:%.*]]
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; OFF: exit:
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; OFF-NEXT: ret i32 [[Y]]
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;
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entry:
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%y1 = load i32, i32* %p
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call void @use(i32 %y1)
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br label %header
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header:
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%y = load i32, i32* %p
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call void @use(i32 %y)
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br i1 %b, label %skip, label %header
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skip:
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call void @clobber(i32* %p, i32* %q)
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br i1 %c, label %header, label %exit
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exit:
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ret i32 %y
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}
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declare void @use(i32) readonly
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declare void @clobber(i32* %p, i32* %q)
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