mirror of
https://github.com/c64scene-ar/llvm-6502.git
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e8757c5dbb
Note: This was originally reverted to track down a buildbot error. Reapply without any modifications. Original commit message: This mostly affects the i64 value type, which always resulted in an 15byte mobavsq instruction to materialize any constant. The custom code checks the value of the immediate and tries to use a different and smaller mov instruction when possible. This fixes <rdar://problem/17420988>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216010 91177308-0d34-0410-b5e6-96231b3b80d8
56 lines
2.6 KiB
LLVM
56 lines
2.6 KiB
LLVM
; RUN: llc -O0 < %s -march=x86-64 | FileCheck %s
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; ModuleID = 'ts.c'
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin10.0"
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@p = common global i8* null, align 8 ; <i8**> [#uses=4]
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@.str = private constant [3 x i8] c"Hi\00" ; <[3 x i8]*> [#uses=1]
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define void @bar() nounwind ssp {
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entry:
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%tmp = load i8** @p ; <i8*> [#uses=1]
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%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %tmp, i1 0) ; <i64> [#uses=1]
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%cmp = icmp ne i64 %0, -1 ; <i1> [#uses=1]
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; CHECK: movq $-1, [[RAX:%r..]]
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; CHECK: cmpq $-1, [[RAX]]
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br i1 %cmp, label %cond.true, label %cond.false
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cond.true: ; preds = %entry
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%tmp1 = load i8** @p ; <i8*> [#uses=1]
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%tmp2 = load i8** @p ; <i8*> [#uses=1]
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%1 = call i64 @llvm.objectsize.i64.p0i8(i8* %tmp2, i1 1) ; <i64> [#uses=1]
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%call = call i8* @__strcpy_chk(i8* %tmp1, i8* getelementptr inbounds ([3 x i8]* @.str, i32 0, i32 0), i64 %1) ssp ; <i8*> [#uses=1]
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br label %cond.end
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cond.false: ; preds = %entry
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%tmp3 = load i8** @p ; <i8*> [#uses=1]
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%call4 = call i8* @__inline_strcpy_chk(i8* %tmp3, i8* getelementptr inbounds ([3 x i8]* @.str, i32 0, i32 0)) ssp ; <i8*> [#uses=1]
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br label %cond.end
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cond.end: ; preds = %cond.false, %cond.true
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%cond = phi i8* [ %call, %cond.true ], [ %call4, %cond.false ] ; <i8*> [#uses=0]
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ret void
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}
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declare i64 @llvm.objectsize.i64.p0i8(i8*, i1) nounwind readonly
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declare i8* @__strcpy_chk(i8*, i8*, i64) ssp
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define internal i8* @__inline_strcpy_chk(i8* %__dest, i8* %__src) nounwind ssp {
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entry:
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%retval = alloca i8* ; <i8**> [#uses=2]
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%__dest.addr = alloca i8* ; <i8**> [#uses=3]
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%__src.addr = alloca i8* ; <i8**> [#uses=2]
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store i8* %__dest, i8** %__dest.addr
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store i8* %__src, i8** %__src.addr
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%tmp = load i8** %__dest.addr ; <i8*> [#uses=1]
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%tmp1 = load i8** %__src.addr ; <i8*> [#uses=1]
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%tmp2 = load i8** %__dest.addr ; <i8*> [#uses=1]
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%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %tmp2, i1 1) ; <i64> [#uses=1]
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%call = call i8* @__strcpy_chk(i8* %tmp, i8* %tmp1, i64 %0) ssp ; <i8*> [#uses=1]
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store i8* %call, i8** %retval
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%1 = load i8** %retval ; <i8*> [#uses=1]
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ret i8* %1
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}
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