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09fc34b10a
This helps more branches into selects. On R600, vectors are cheap and anything that helps remove branches is very good. llvm-svn: 209914
61 lines
2.3 KiB
LLVM
61 lines
2.3 KiB
LLVM
; RUN: opt -S -simplifycfg < %s | FileCheck %s
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define i32 @speculate_vector_extract(i32 %d, <4 x i32> %v) #0 {
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; CHECK-LABEL: @speculate_vector_extract(
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; CHECK-NOT: br
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entry:
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%conv = insertelement <4 x i32> undef, i32 %d, i32 0
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%conv2 = insertelement <4 x i32> %conv, i32 %d, i32 1
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%conv3 = insertelement <4 x i32> %conv2, i32 %d, i32 2
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%conv4 = insertelement <4 x i32> %conv3, i32 %d, i32 3
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%tmp6 = add nsw <4 x i32> %conv4, <i32 0, i32 -1, i32 -2, i32 -3>
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%cmp = icmp eq <4 x i32> %tmp6, zeroinitializer
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%cmp.ext = sext <4 x i1> %cmp to <4 x i32>
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%tmp8 = extractelement <4 x i32> %cmp.ext, i32 0
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%tobool = icmp eq i32 %tmp8, 0
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br i1 %tobool, label %cond.else, label %cond.then
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return: ; preds = %cond.end28
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ret i32 %cond32
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cond.then: ; preds = %entry
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%tmp10 = extractelement <4 x i32> %v, i32 0
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br label %cond.end
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cond.else: ; preds = %entry
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%tmp12 = extractelement <4 x i32> %v, i32 3
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br label %cond.end
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cond.end: ; preds = %cond.else, %cond.then
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%cond = phi i32 [ %tmp10, %cond.then ], [ %tmp12, %cond.else ]
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%tmp14 = extractelement <4 x i32> %cmp.ext, i32 1
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%tobool15 = icmp eq i32 %tmp14, 0
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br i1 %tobool15, label %cond.else17, label %cond.then16
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cond.then16: ; preds = %cond.end
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%tmp20 = extractelement <4 x i32> %v, i32 1
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br label %cond.end18
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cond.else17: ; preds = %cond.end
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br label %cond.end18
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cond.end18: ; preds = %cond.else17, %cond.then16
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%cond22 = phi i32 [ %tmp20, %cond.then16 ], [ %cond, %cond.else17 ]
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%tmp24 = extractelement <4 x i32> %cmp.ext, i32 2
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%tobool25 = icmp eq i32 %tmp24, 0
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br i1 %tobool25, label %cond.else27, label %cond.then26
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cond.then26: ; preds = %cond.end18
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%tmp30 = extractelement <4 x i32> %v, i32 2
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br label %cond.end28
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cond.else27: ; preds = %cond.end18
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br label %cond.end28
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cond.end28: ; preds = %cond.else27, %cond.then26
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%cond32 = phi i32 [ %tmp30, %cond.then26 ], [ %cond22, %cond.else27 ]
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br label %return
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}
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attributes #0 = { nounwind }
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