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d1195ef11e
If converter was somewhat careless about "diamond" cases, where there was no join block, or in other words, where the true/false blocks did not have analyzable branches. In such cases, it was possible for it to remove (needed) branches, resulting in a loss of entire basic blocks. Differential Revision: http://reviews.llvm.org/D16156 llvm-svn: 258310
44 lines
1.4 KiB
LLVM
44 lines
1.4 KiB
LLVM
; RUN: llc -march=hexagon -minimum-jump-tables=1 < %s
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; REQUIRES: asserts
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target datalayout = "e-m:e-p:32:32:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8-f64:64:64-f32:32:32-v64:64:64-v32:32:32-a:0-n16:32"
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target triple = "hexagon"
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%struct.t0 = type { i8, [2 x i8] }
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%struct.t1 = type { i8, i8, [1900 x i8], %struct.t0 }
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@var = internal global [3 x %struct.t1] zeroinitializer, align 8
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declare void @foo() #2
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declare void @bar(i32, i32) #2
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; Function Attrs: nounwind
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define void @fred(i8 signext %a, i8 signext %b) #1 {
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entry:
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%i = sext i8 %a to i32
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%t = getelementptr inbounds [3 x %struct.t1], [3 x %struct.t1]* @var, i32 0, i32 %i, i32 3, i32 0
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%0 = load i8, i8* %t, align 8
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switch i8 %0, label %if.end14 [
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i8 1, label %if.then
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i8 0, label %do.body
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]
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if.then: ; preds = %entry
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%j = sext i8 %b to i32
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%u = getelementptr inbounds [3 x %struct.t1], [3 x %struct.t1]* @var, i32 0, i32 %i, i32 3, i32 1, i32 %j
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store i8 1, i8* %u, align 1
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tail call void @foo() #0
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br label %if.end14
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do.body: ; preds = %entry
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%conv11 = sext i8 %b to i32
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tail call void @bar(i32 %i, i32 %conv11) #0
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br label %if.end14
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if.end14: ; preds = %entry, %do.body, %if.then
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ret void
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}
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attributes #0 = { nounwind }
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attributes #1 = { nounwind "disable-tail-calls"="false" }
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attributes #2 = { "disable-tail-calls"="false" }
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