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5b56cc85b0
This allows targets to make more decisions about reserved registers after isel. For example, now it should be certain there are calls or stack objects in the frame or not, which could have been introduced by legalization. Patch by Matthias Braun git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@363757 91177308-0d34-0410-b5e6-96231b3b80d8
35 lines
1.2 KiB
LLVM
35 lines
1.2 KiB
LLVM
; 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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