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Add an ugly note.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50029 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1656,3 +1656,38 @@ extending to the fall through). The register pressure in the loop isn't high
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enough to warrant the spill.
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enough to warrant the spill.
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Also check why xmm7 is not used at all in the function.
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Also check why xmm7 is not used at all in the function.
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//===---------------------------------------------------------------------===//
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Legalize loses track of the fact that bools are always zero extended when in
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memory. This causes us to compile abort_gzip (from 164.gzip) from:
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i386-apple-darwin8"
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@in_exit.4870.b = internal global i1 false ; <i1*> [#uses=2]
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define fastcc void @abort_gzip() noreturn nounwind {
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entry:
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%tmp.b.i = load i1* @in_exit.4870.b ; <i1> [#uses=1]
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br i1 %tmp.b.i, label %bb.i, label %bb4.i
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bb.i: ; preds = %entry
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tail call void @exit( i32 1 ) noreturn nounwind
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unreachable
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bb4.i: ; preds = %entry
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store i1 true, i1* @in_exit.4870.b
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tail call void @exit( i32 1 ) noreturn nounwind
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unreachable
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}
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declare void @exit(i32) noreturn nounwind
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into:
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_abort_gzip:
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subl $12, %esp
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movb _in_exit.4870.b, %al
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notb %al
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testb $1, %al
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jne LBB1_2 ## bb4.i
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LBB1_1: ## bb.i
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...
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//===---------------------------------------------------------------------===//
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