derek.holloway
7502bf64a4
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104 lines
3.2 KiB
LLVM
104 lines
3.2 KiB
LLVM
; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s
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@A = global i32 0, align 4
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@B = global i32 0, align 4
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; CHECK-LABEL: eq_opaque_minus_one
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define void @eq_opaque_minus_one(ptr %base) {
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entry:
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%const = bitcast i32 -1 to i32
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%tmp1 = load i32, ptr @B, align 4
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br label %for.body
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; CHECK: edge %for.body -> %if.then probability is 0x30000000 / 0x80000000 = 37.50%
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; CHECK: edge %for.body -> %for.inc probability is 0x50000000 / 0x80000000 = 62.50%
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for.body:
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%tmp4 = phi i32 [ %tmp1, %entry ], [ %tmp7, %for.inc ]
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%inc.iv = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%storemerge176.in = getelementptr inbounds i32, ptr %base, i32 %inc.iv
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%storemerge176 = load i32, ptr %storemerge176.in, align 4
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store i32 %storemerge176, ptr @A, align 4
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%cmp20 = icmp eq i32 %storemerge176, %const
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br i1 %cmp20, label %if.then, label %for.inc
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if.then:
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%lnot.ext = zext i1 %cmp20 to i32
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store i32 %lnot.ext, ptr @B, align 4
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br label %for.inc
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for.inc:
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%tmp7 = phi i32 [ %tmp4, %for.body ], [ %lnot.ext, %if.then ]
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%inc = add nuw nsw i32 %inc.iv, 1
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%cmp9 = icmp ult i32 %inc, 401
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br i1 %cmp9, label %for.body, label %exit
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exit:
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ret void
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}
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; CHECK-LABEL: ne_opaque_minus_one
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define void @ne_opaque_minus_one(ptr %base) {
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entry:
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%const = bitcast i32 -1 to i32
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%tmp1 = load i32, ptr @B, align 4
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br label %for.body
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; CHECK: edge %for.body -> %if.then probability is 0x50000000 / 0x80000000 = 62.50%
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; CHECK: edge %for.body -> %for.inc probability is 0x30000000 / 0x80000000 = 37.50%
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for.body:
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%tmp4 = phi i32 [ %tmp1, %entry ], [ %tmp7, %for.inc ]
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%inc.iv = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%storemerge176.in = getelementptr inbounds i32, ptr %base, i32 %inc.iv
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%storemerge176 = load i32, ptr %storemerge176.in, align 4
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store i32 %storemerge176, ptr @A, align 4
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%cmp20 = icmp ne i32 %storemerge176, %const
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br i1 %cmp20, label %if.then, label %for.inc
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if.then:
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%lnot.ext = zext i1 %cmp20 to i32
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store i32 %lnot.ext, ptr @B, align 4
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br label %for.inc
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for.inc:
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%tmp7 = phi i32 [ %tmp4, %for.body ], [ %lnot.ext, %if.then ]
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%inc = add nuw nsw i32 %inc.iv, 1
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%cmp9 = icmp ult i32 %inc, 401
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br i1 %cmp9, label %for.body, label %exit
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exit:
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ret void
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}
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; CHECK-LABEL: sgt_opaque_minus_one
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define void @sgt_opaque_minus_one(ptr %base) {
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entry:
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%const = bitcast i32 -1 to i32
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%tmp1 = load i32, ptr @B, align 4
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br label %for.body
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; CHECK: edge %for.body -> %if.then probability is 0x50000000 / 0x80000000 = 62.50%
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; CHECK: edge %for.body -> %for.inc probability is 0x30000000 / 0x80000000 = 37.50%
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for.body:
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%tmp4 = phi i32 [ %tmp1, %entry ], [ %tmp7, %for.inc ]
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%inc.iv = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%storemerge176.in = getelementptr inbounds i32, ptr %base, i32 %inc.iv
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%storemerge176 = load i32, ptr %storemerge176.in, align 4
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store i32 %storemerge176, ptr @A, align 4
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%cmp20 = icmp sgt i32 %storemerge176, %const
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br i1 %cmp20, label %if.then, label %for.inc
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if.then:
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%lnot.ext = zext i1 %cmp20 to i32
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store i32 %lnot.ext, ptr @B, align 4
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br label %for.inc
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for.inc:
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%tmp7 = phi i32 [ %tmp4, %for.body ], [ %lnot.ext, %if.then ]
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%inc = add nuw nsw i32 %inc.iv, 1
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%cmp9 = icmp ult i32 %inc, 401
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br i1 %cmp9, label %for.body, label %exit
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exit:
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ret void
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}
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