35 lines
1.2 KiB
LLVM
35 lines
1.2 KiB
LLVM
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; RUN: llc < %s -mtriple=x86_64-apple-darwin -print-after=finalize-isel -o /dev/null 2>&1 | FileCheck %s
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;; Make sure a transformation in SelectionDAGBuilder that converts "or + br" to
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;; two branches correctly updates the branch probability.
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@max_regno = common global i32 0, align 4
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define void @test(i32* %old, i32 %final) {
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for.cond:
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br label %for.cond2
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for.cond2: ; preds = %for.inc, %for.cond
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%i.1 = phi i32 [ %inc19, %for.inc ], [ 0, %for.cond ]
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%bit.0 = phi i32 [ %shl, %for.inc ], [ 1, %for.cond ]
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%tobool = icmp eq i32 %bit.0, 0
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%v3 = load i32, i32* @max_regno, align 4
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%cmp4 = icmp eq i32 %i.1, %v3
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%or.cond = or i1 %tobool, %cmp4
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br i1 %or.cond, label %for.inc20, label %for.inc, !prof !0
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; CHECK: bb.1.for.cond2:
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; CHECK: successors: %bb.3(0x01f3d4c5), %bb.4(0x7e0c2b3b)
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; CHECK: bb.4.for.cond2:
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; CHECK: successors: %bb.3(0x01fb92cf), %bb.2(0x7e046d31)
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for.inc: ; preds = %for.cond2
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%shl = shl i32 %bit.0, 1
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%inc19 = add nsw i32 %i.1, 1
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br label %for.cond2
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for.inc20: ; preds = %for.cond2
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ret void
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}
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!0 = !{!"branch_weights", i32 112017436, i32 -735157296}
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