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llvm-project/llvm/test/Transforms/MemCpyOpt/2008-02-24-MultipleUseofSRe...

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Make BasicAliasAnalysis a normal AliasAnalysis implementation which does normal initialization and normal chaining. Change the default AliasAnalysis implementation to NoAlias. Update StandardCompileOpts.h and friends to explicitly request BasicAliasAnalysis. Update tests to explicitly request -basicaa. llvm-svn: 116720
2010-10-19 02:04:47 +08:00
; RUN: opt < %s -basicaa -memcpyopt -dse -S | grep {call.*initialize} | not grep memtmp
Improve the return slot optimization to be both more aggressive (not limited to sret parameters), and safer (when the passed pointer might be invalid). Thanks to Duncan and Chris for the idea behind this, and extra thanks to Duncan for helping me work out the trap-safety. llvm-svn: 48280
2008-03-12 15:37:44 +08:00
; PR2077
Fix an issue where GVN was performing the return slot optimization when it was not safe. This is fixed by more aggressively checking that the return slot is not used elsewhere in the function. llvm-svn: 47544
2008-02-25 12:08:09 +08:00
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-f80:32:32"
target triple = "i386-pc-linux-gnu"
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. llvm-svn: 133337
2011-06-18 14:05:24 +08:00
%0 = type { x86_fp80, x86_fp80 }
define internal fastcc void @initialize(%0* noalias sret %agg.result) nounwind {
Fix an issue where GVN was performing the return slot optimization when it was not safe. This is fixed by more aggressively checking that the return slot is not used elsewhere in the function. llvm-svn: 47544
2008-02-25 12:08:09 +08:00
entry:
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. llvm-svn: 133337
2011-06-18 14:05:24 +08:00
%agg.result.03 = getelementptr %0* %agg.result, i32 0, i32 0
store x86_fp80 0xK00000000000000000000, x86_fp80* %agg.result.03
%agg.result.15 = getelementptr %0* %agg.result, i32 0, i32 1
store x86_fp80 0xK00000000000000000000, x86_fp80* %agg.result.15
ret void
Fix an issue where GVN was performing the return slot optimization when it was not safe. This is fixed by more aggressively checking that the return slot is not used elsewhere in the function. llvm-svn: 47544
2008-02-25 12:08:09 +08:00
}
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. llvm-svn: 133337
2011-06-18 14:05:24 +08:00
declare fastcc x86_fp80 @passed_uninitialized(%0*) nounwind
Fix an issue where GVN was performing the return slot optimization when it was not safe. This is fixed by more aggressively checking that the return slot is not used elsewhere in the function. llvm-svn: 47544
2008-02-25 12:08:09 +08:00
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. llvm-svn: 133337
2011-06-18 14:05:24 +08:00
define fastcc void @badly_optimized() nounwind {
Fix an issue where GVN was performing the return slot optimization when it was not safe. This is fixed by more aggressively checking that the return slot is not used elsewhere in the function. llvm-svn: 47544
2008-02-25 12:08:09 +08:00
entry:
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. llvm-svn: 133337
2011-06-18 14:05:24 +08:00
%z = alloca %0
%tmp = alloca %0
%memtmp = alloca %0, align 8
call fastcc void @initialize(%0* noalias sret %memtmp)
%tmp1 = bitcast %0* %tmp to i8*
%memtmp2 = bitcast %0* %memtmp to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %tmp1, i8* %memtmp2, i32 24, i32 8, i1 false)
%z3 = bitcast %0* %z to i8*
%tmp4 = bitcast %0* %tmp to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %z3, i8* %tmp4, i32 24, i32 8, i1 false)
%tmp5 = call fastcc x86_fp80 @passed_uninitialized(%0* %z)
ret void
Fix an issue where GVN was performing the return slot optimization when it was not safe. This is fixed by more aggressively checking that the return slot is not used elsewhere in the function. llvm-svn: 47544
2008-02-25 12:08:09 +08:00
}
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. llvm-svn: 133337
2011-06-18 14:05:24 +08:00
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind