62 lines
1.7 KiB
LLVM
62 lines
1.7 KiB
LLVM
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; RUN: opt -S -loop-unroll -unroll-force-peel-count=1 -verify-dom-info <%s
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; Check if loop composed of several BBs is peeled correctly.
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declare void @funcb()
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@Comma = external global i8
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define void @funca(i8* readnone %b, i8* readnone %e) {
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entry:
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%cmp2 = icmp eq i8* %b, %e
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br i1 %cmp2, label %for.end, label %for.body.preheader
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for.body.preheader:
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br label %for.body
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for.body:
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%b.addr.03 = phi i8* [ %incdec.ptr, %for.inc ], [ %b, %for.body.preheader ]
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%0 = load i8, i8* @Comma
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%tobool = icmp eq i8 %0, 0
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br i1 %tobool, label %for.inc, label %if.then
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if.then:
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tail call void @funcb()
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store i8 1, i8* @Comma
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br label %for.inc
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for.inc:
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%incdec.ptr = getelementptr inbounds i8, i8* %b.addr.03, i64 1
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%cmp = icmp eq i8* %incdec.ptr, %e
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br i1 %cmp, label %for.end, label %for.body
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for.end:
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ret void
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}
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; CHECK_LABEL: @funca
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; Peeled iteration
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; CHECK: %[[REG1:[0-9]+]] = load i8, i8* @Comma
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; CHECK: %[[REG2:.*]] = icmp eq i8 %[[REG1]], 0
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; CHECK: br i1 %[[REG2]], label %{{.*}}, label %[[IFTHEN:.*]]
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; CHECK: [[IFTHEN]]:
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; CHECK: call void @funcb()
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; CHECK: store i8 1, i8* @Comma
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; CHECK: br label %[[FORINC]]
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; CHECK: [[FORINC]]:
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; CHECK: %[[REG3:.*]] = getelementptr inbounds i8, i8* %b, i64 1
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; CHECK: %[[REG4:.*]] = icmp eq i8* %[[REG3]], %e
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; CHECK: br i1 %[[REG4]]
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; main body
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; CHECK: %[[REG1b:.*]] = load i8, i8* @Comma
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; CHECK: %[[REG2b:.*]] = icmp eq i8 %[[REG1b]], 0
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; CHECK: br i1 %[[REG2b]], label %{{.*}}, label %[[IFTHENb:.*]]
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; CHECK: [[IFTHENb]]:
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; CHECK: call void @funcb()
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; CHECK: store i8 1, i8* @Comma
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; CHECK: br label %[[FORINCb]]
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; CHECK: [[FORINCb]]:
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; CHECK: %[[REG3b:.*]] = getelementptr inbounds i8, i8* %b, i64 1
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; CHECK: %[[REG4b:.*]] = icmp eq i8* %[[REG3b]], %e
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; CHECK: br i1 %[[REG4b]]
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