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Gentoo's Bugzilla – Attachment 367226 Details for
Bug 497298
sys-devel/llvm-3.4 miscompiles code with varargs
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r197503 3/4
r197503-x86-vaargs.ll (text/plain), 2.36 KB, created by
Holger Hoffstätte
on 2014-01-06 22:47:12 UTC
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Description:
r197503 3/4
Filename:
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Creator:
Holger Hoffstätte
Created:
2014-01-06 22:47:12 UTC
Size:
2.36 KB
patch
obsolete
>; RUN: llc %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=NO-FLAGS >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-S128" >target triple = "x86_64-apple-macosx10.9.0" > >%struct.__va_list_tag = type { i32, i32, i8*, i8* } > >; Check that vastart gets the right thing. >define i32 @sum(i32 %count, ...) nounwind optsize ssp uwtable { >; CHECK: testb %al, %al >; CHECK-NEXT: je >; CHECK-NEXT: ## BB#{{[0-9]+}}: >; CHECK-NEXT: vmovaps %xmm0, 48(%rsp) >; CHECK-NEXT: vmovaps %xmm1, 64(%rsp) >; CHECK-NEXT: vmovaps %xmm2, 80(%rsp) >; CHECK-NEXT: vmovaps %xmm3, 96(%rsp) >; CHECK-NEXT: vmovaps %xmm4, 112(%rsp) >; CHECK-NEXT: vmovaps %xmm5, 128(%rsp) >; CHECK-NEXT: vmovaps %xmm6, 144(%rsp) >; CHECK-NEXT: vmovaps %xmm7, 160(%rsp) > >; Check that [EFLAGS] hasn't been pulled in. >; NO-FLAGS-NOT: %flags > > %ap = alloca [1 x %struct.__va_list_tag], align 16 > %1 = bitcast [1 x %struct.__va_list_tag]* %ap to i8* > call void @llvm.va_start(i8* %1) > %2 = icmp sgt i32 %count, 0 > br i1 %2, label %.lr.ph, label %._crit_edge > >.lr.ph: ; preds = %0 > %3 = getelementptr inbounds [1 x %struct.__va_list_tag]* %ap, i64 0, i64 0, i32 0 > %4 = getelementptr inbounds [1 x %struct.__va_list_tag]* %ap, i64 0, i64 0, i32 2 > %.pre = load i32* %3, align 16 > br label %5 > >; <label>:5 ; preds = %.lr.ph, %13 > %6 = phi i32 [ %.pre, %.lr.ph ], [ %14, %13 ] > %.01 = phi i32 [ %count, %.lr.ph ], [ %15, %13 ] > %7 = icmp ult i32 %6, 41 > br i1 %7, label %8, label %10 > >; <label>:8 ; preds = %5 > %9 = add i32 %6, 8 > store i32 %9, i32* %3, align 16 > br label %13 > >; <label>:10 ; preds = %5 > %11 = load i8** %4, align 8 > %12 = getelementptr i8* %11, i64 8 > store i8* %12, i8** %4, align 8 > br label %13 > >; <label>:13 ; preds = %10, %8 > %14 = phi i32 [ %6, %10 ], [ %9, %8 ] > %15 = add nsw i32 %.01, 1 > %16 = icmp sgt i32 %15, 0 > br i1 %16, label %5, label %._crit_edge > >._crit_edge: ; preds = %13, %0 > %.0.lcssa = phi i32 [ %count, %0 ], [ %15, %13 ] > call void @llvm.va_end(i8* %1) > ret i32 %.0.lcssa >} > >declare void @llvm.va_start(i8*) nounwind > >declare void @llvm.va_end(i8*) nounwind
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bug 497298
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367222
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