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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50029 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-04-21 04:46:30 +00:00
parent 1d40281ae6
commit 7d717a0b70
1 changed files with 35 additions and 0 deletions
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35
lib/Target/X86/README.txt
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@ -1656,3 +1656,38 @@ extending to the fall through). The register pressure in the loop isn't high
enough to warrant the spill. enough to warrant the spill.
Also check why xmm7 is not used at all in the function. Also check why xmm7 is not used at all in the function.
//===---------------------------------------------------------------------===//
Legalize loses track of the fact that bools are always zero extended when in
memory. This causes us to compile abort_gzip (from 164.gzip) from:
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"
target triple = "i386-apple-darwin8"
@in_exit.4870.b = internal global i1 false ; <i1*> [#uses=2]
define fastcc void @abort_gzip() noreturn nounwind {
entry:
%tmp.b.i = load i1* @in_exit.4870.b ; <i1> [#uses=1]
br i1 %tmp.b.i, label %bb.i, label %bb4.i
bb.i: ; preds = %entry
tail call void @exit( i32 1 ) noreturn nounwind
unreachable
bb4.i: ; preds = %entry
store i1 true, i1* @in_exit.4870.b
tail call void @exit( i32 1 ) noreturn nounwind
unreachable
}
declare void @exit(i32) noreturn nounwind
into:
_abort_gzip:
subl $12, %esp
movb _in_exit.4870.b, %al
notb %al
testb $1, %al
jne LBB1_2 ## bb4.i
LBB1_1: ## bb.i
...
//===---------------------------------------------------------------------===//