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llvm-6502/test/CodeGen/X86/2010-02-12-CoalescerBug-Impdef.ll
Chris Lattner 1afcace3a3 Land the long talked about "type system rewrite" patch. This 
patch brings numerous advantages to LLVM.  One way to look at it
is through diffstat:
 109 files changed, 3005 insertions(+), 5906 deletions(-)

Removing almost 3K lines of code is a good thing.  Other advantages
include:

1. Value::getType() is a simple load that can be CSE'd, not a mutating
   union-find operation.
2. Types a uniqued and never move once created, defining away PATypeHolder.
3. Structs can be "named" now, and their name is part of the identity that
   uniques them.  This means that the compiler doesn't merge them structurally
   which makes the IR much less confusing.
4. Now that there is no way to get a cycle in a type graph without a named
   struct type, "upreferences" go away.
5. Type refinement is completely gone, which should make LTO much MUCH faster
   in some common cases with C++ code.
6. Types are now generally immutable, so we can use "Type *" instead 
   "const Type *" everywhere.

Downsides of this patch are that it removes some functions from the C API,
so people using those will have to upgrade to (not yet added) new API.  
"LLVM 3.0" is the right time to do this.

There are still some cleanups pending after this, this patch is large enough
as-is.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134829 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-09 17:41:24 +00:00

261 lines
15 KiB
LLVM
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; RUN: llc < %s > %t
; PR6283
; Tricky coalescer bug:
; After coalescing %RAX with a virtual register, this instruction was rematted:
;
; %EAX<def> = MOV32rr %reg1070<kill>
;
; This instruction silently defined %RAX, and when rematting removed the
; instruction, the live interval for %RAX was not properly updated. The valno
; referred to a deleted instruction and bad things happened.
;
; The fix is to implicitly define %RAX when coalescing:
;
; %EAX<def> = MOV32rr %reg1070<kill>, %RAX<imp-def>
;
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"
target triple = "x86_64-unknown-linux-gnu"
module asm "\09.ident\09\22GCC: (GNU) 4.5.0 20100212 (experimental) LLVM: 95975\22"
%0 = type { %"union gimple_statement_d"* }
%"BITMAP_WORD[]" = type [2 x i64]
%"uchar[]" = type [1 x i8]
%"char[]" = type [4 x i8]
%"enum dom_state[]" = type [2 x i32]
%"int[]" = type [4 x i32]
%"struct VEC_basic_block_base" = type { i32, i32, [1 x %"struct basic_block_def"*] }
%"struct VEC_basic_block_gc" = type { %"struct VEC_basic_block_base" }
%"struct VEC_edge_base" = type { i32, i32, [1 x %"struct edge_def"*] }
%"struct VEC_edge_gc" = type { %"struct VEC_edge_base" }
%"struct VEC_gimple_base" = type { i32, i32, [1 x %"union gimple_statement_d"*] }
%"struct VEC_gimple_gc" = type { %"struct VEC_gimple_base" }
%"struct VEC_iv_cand_p_base" = type { i32, i32, [1 x %"struct iv_cand"*] }
%"struct VEC_iv_cand_p_heap" = type { %"struct VEC_iv_cand_p_base" }
%"struct VEC_iv_use_p_base" = type { i32, i32, [1 x %"struct iv_use"*] }
%"struct VEC_iv_use_p_heap" = type { %"struct VEC_iv_use_p_base" }
%"struct VEC_loop_p_base" = type { i32, i32, [1 x %"struct loop"*] }
%"struct VEC_loop_p_gc" = type { %"struct VEC_loop_p_base" }
%"struct VEC_rtx_base" = type { i32, i32, [1 x %"struct rtx_def"*] }
%"struct VEC_rtx_gc" = type { %"struct VEC_rtx_base" }
%"struct VEC_tree_base" = type { i32, i32, [1 x %"union tree_node"*] }
%"struct VEC_tree_gc" = type { %"struct VEC_tree_base" }
%"struct _obstack_chunk" = type { i8*, %"struct _obstack_chunk"*, %"char[]" }
%"struct basic_block_def" = type { %"struct VEC_edge_gc"*, %"struct VEC_edge_gc"*, i8*, %"struct loop"*, [2 x %"struct et_node"*], %"struct basic_block_def"*, %"struct basic_block_def"*, %"union basic_block_il_dependent", i64, i32, i32, i32, i32, i32 }
%"struct bitmap_element" = type { %"struct bitmap_element"*, %"struct bitmap_element"*, i32, %"BITMAP_WORD[]" }
%"struct bitmap_head_def" = type { %"struct bitmap_element"*, %"struct bitmap_element"*, i32, %"struct bitmap_obstack"* }
%"struct bitmap_obstack" = type { %"struct bitmap_element"*, %"struct bitmap_head_def"*, %"struct obstack" }
%"struct block_symbol" = type { [3 x %"union rtunion"], %"struct object_block"*, i64 }
%"struct comp_cost" = type { i32, i32 }
%"struct control_flow_graph" = type { %"struct basic_block_def"*, %"struct basic_block_def"*, %"struct VEC_basic_block_gc"*, i32, i32, i32, %"struct VEC_basic_block_gc"*, i32, %"enum dom_state[]", %"enum dom_state[]", i32, i32 }
%"struct cost_pair" = type { %"struct iv_cand"*, %"struct comp_cost", %"struct bitmap_head_def"*, %"union tree_node"* }
%"struct def_optype_d" = type { %"struct def_optype_d"*, %"union tree_node"** }
%"struct double_int" = type { i64, i64 }
%"struct edge_def" = type { %"struct basic_block_def"*, %"struct basic_block_def"*, %"union edge_def_insns", i8*, %"union tree_node"*, i32, i32, i32, i32, i64 }
%"struct eh_status" = type opaque
%"struct et_node" = type opaque
%"struct function" = type { %"struct eh_status"*, %"struct control_flow_graph"*, %"struct gimple_seq_d"*, %"struct gimple_df"*, %"struct loops"*, %"struct htab"*, %"union tree_node"*, %"union tree_node"*, %"union tree_node"*, %"union tree_node"*, %"struct machine_function"*, %"struct language_function"*, %"struct htab"*, i32, i32, i32, i32, i32, i32, i8*, i8, i8, i8, i8 }
%"struct gimple_bb_info" = type { %"struct gimple_seq_d"*, %"struct gimple_seq_d"* }
%"struct gimple_df" = type { %"struct htab"*, %"struct VEC_gimple_gc"*, %"struct VEC_tree_gc"*, %"union tree_node"*, %"struct pt_solution", %"struct pt_solution", %"struct pointer_map_t"*, %"union tree_node"*, %"struct htab"*, %"struct bitmap_head_def"*, i8, %"struct ssa_operands" }
%"struct gimple_seq_d" = type { %"struct gimple_seq_node_d"*, %"struct gimple_seq_node_d"*, %"struct gimple_seq_d"* }
%"struct gimple_seq_node_d" = type { %"union gimple_statement_d"*, %"struct gimple_seq_node_d"*, %"struct gimple_seq_node_d"* }
%"struct gimple_statement_base" = type { i8, i8, i16, i32, i32, i32, %"struct basic_block_def"*, %"union tree_node"* }
%"struct phi_arg_d[]" = type [1 x %"struct phi_arg_d"]
%"struct gimple_statement_phi" = type { %"struct gimple_statement_base", i32, i32, %"union tree_node"*, %"struct phi_arg_d[]" }
%"struct htab" = type { i32 (i8*)*, i32 (i8*, i8*)*, void (i8*)*, i8**, i64, i64, i64, i32, i32, i8* (i64, i64)*, void (i8*)*, i8*, i8* (i8*, i64, i64)*, void (i8*, i8*)*, i32 }
%"struct iv" = type { %"union tree_node"*, %"union tree_node"*, %"union tree_node"*, %"union tree_node"*, i8, i8, i32 }
%"struct iv_cand" = type { i32, i8, i32, %"union gimple_statement_d"*, %"union tree_node"*, %"union tree_node"*, %"struct iv"*, i32, i32, %"struct iv_use"*, %"struct bitmap_head_def"* }
%"struct iv_use" = type { i32, i32, %"struct iv"*, %"union gimple_statement_d"*, %"union tree_node"**, %"struct bitmap_head_def"*, i32, %"struct cost_pair"*, %"struct iv_cand"* }
%"struct ivopts_data" = type { %"struct loop"*, %"struct pointer_map_t"*, i32, i32, %"struct version_info"*, %"struct bitmap_head_def"*, %"struct VEC_iv_use_p_heap"*, %"struct VEC_iv_cand_p_heap"*, %"struct bitmap_head_def"*, i32, i8, i8 }
%"struct lang_decl" = type opaque
%"struct language_function" = type opaque
%"struct loop" = type { i32, i32, %"struct basic_block_def"*, %"struct basic_block_def"*, %"struct comp_cost", i32, i32, %"struct VEC_loop_p_gc"*, %"struct loop"*, %"struct loop"*, i8*, %"union tree_node"*, %"struct double_int", %"struct double_int", i8, i8, i32, %"struct nb_iter_bound"*, %"struct loop_exit"*, i8, %"union tree_node"* }
%"struct loop_exit" = type { %"struct edge_def"*, %"struct loop_exit"*, %"struct loop_exit"*, %"struct loop_exit"* }
%"struct loops" = type { i32, %"struct VEC_loop_p_gc"*, %"struct htab"*, %"struct loop"* }
%"struct machine_cfa_state" = type { %"struct rtx_def"*, i64 }
%"struct machine_function" = type { %"struct stack_local_entry"*, i8*, i32, i32, %"int[]", i32, %"struct machine_cfa_state", i32, i8 }
%"struct nb_iter_bound" = type { %"union gimple_statement_d"*, %"struct double_int", i8, %"struct nb_iter_bound"* }
%"struct object_block" = type { %"union section"*, i32, i64, %"struct VEC_rtx_gc"*, %"struct VEC_rtx_gc"* }
%"struct obstack" = type { i64, %"struct _obstack_chunk"*, i8*, i8*, i8*, i64, i32, %"struct _obstack_chunk"* (i8*, i64)*, void (i8*, %"struct _obstack_chunk"*)*, i8*, i8 }
%"struct phi_arg_d" = type { %"struct ssa_use_operand_d", %"union tree_node"*, i32 }
%"struct pointer_map_t" = type opaque
%"struct pt_solution" = type { i8, %"struct bitmap_head_def"* }
%"struct rtx_def" = type { i16, i8, i8, %"union u" }
%"struct section_common" = type { i32 }
%"struct ssa_operand_memory_d" = type { %"struct ssa_operand_memory_d"*, %"uchar[]" }
%"struct ssa_operands" = type { %"struct ssa_operand_memory_d"*, i32, i32, i8, %"struct def_optype_d"*, %"struct use_optype_d"* }
%"struct ssa_use_operand_d" = type { %"struct ssa_use_operand_d"*, %"struct ssa_use_operand_d"*, %0, %"union tree_node"** }
%"struct stack_local_entry" = type opaque
%"struct tree_base" = type <{ i16, i8, i8, i8, [2 x i8], i8 }>
%"struct tree_common" = type { %"struct tree_base", %"union tree_node"*, %"union tree_node"* }
%"struct tree_decl_common" = type { %"struct tree_decl_minimal", %"union tree_node"*, i8, i8, i8, i8, i8, i32, %"union tree_node"*, %"union tree_node"*, %"union tree_node"*, %"union tree_node"*, %"struct lang_decl"* }
%"struct tree_decl_minimal" = type { %"struct tree_common", i32, i32, %"union tree_node"*, %"union tree_node"* }
%"struct tree_decl_non_common" = type { %"struct tree_decl_with_vis", %"union tree_node"*, %"union tree_node"*, %"union tree_node"*, %"union tree_node"* }
%"struct tree_decl_with_rtl" = type { %"struct tree_decl_common", %"struct rtx_def"* }
%"struct tree_decl_with_vis" = type { %"struct tree_decl_with_rtl", %"union tree_node"*, %"union tree_node"*, %"union tree_node"*, i8, i8, i8 }
%"struct tree_function_decl" = type { %"struct tree_decl_non_common", %"struct function"*, %"union tree_node"*, %"union tree_node"*, %"union tree_node"*, i16, i8, i8 }
%"struct unnamed_section" = type { %"struct section_common", void (i8*)*, i8*, %"union section"* }
%"struct use_optype_d" = type { %"struct use_optype_d"*, %"struct ssa_use_operand_d" }
%"struct version_info" = type { %"union tree_node"*, %"struct iv"*, i8, i32, i8 }
%"union basic_block_il_dependent" = type { %"struct gimple_bb_info"* }
%"union edge_def_insns" = type { %"struct gimple_seq_d"* }
%"union gimple_statement_d" = type { %"struct gimple_statement_phi" }
%"union rtunion" = type { i8* }
%"union section" = type { %"struct unnamed_section" }
%"union tree_node" = type { %"struct tree_function_decl" }
%"union u" = type { %"struct block_symbol" }
declare fastcc %"union tree_node"* @get_computation_at(%"struct loop"*, %"struct iv_use"* nocapture, %"struct iv_cand"* nocapture, %"union gimple_statement_d"*) nounwind
declare fastcc i32 @computation_cost(%"union tree_node"*, i8 zeroext) nounwind
define fastcc i64 @get_computation_cost_at(%"struct ivopts_data"* %data, %"struct iv_use"* nocapture %use, %"struct iv_cand"* nocapture %cand, i8 zeroext %address_p, %"struct bitmap_head_def"** %depends_on, %"union gimple_statement_d"* %at, i8* %can_autoinc) nounwind {
entry:
br i1 undef, label %"100", label %"4"
"4": ; preds = %entry
br i1 undef, label %"6", label %"5"
"5": ; preds = %"4"
unreachable
"6": ; preds = %"4"
br i1 undef, label %"8", label %"7"
"7": ; preds = %"6"
unreachable
"8": ; preds = %"6"
br i1 undef, label %"100", label %"10"
"10": ; preds = %"8"
br i1 undef, label %"17", label %"16"
"16": ; preds = %"10"
unreachable
"17": ; preds = %"10"
br i1 undef, label %"19", label %"18"
"18": ; preds = %"17"
unreachable
"19": ; preds = %"17"
br i1 undef, label %"93", label %"20"
"20": ; preds = %"19"
br i1 undef, label %"23", label %"21"
"21": ; preds = %"20"
unreachable
"23": ; preds = %"20"
br i1 undef, label %"100", label %"25"
"25": ; preds = %"23"
br i1 undef, label %"100", label %"26"
"26": ; preds = %"25"
br i1 undef, label %"30", label %"28"
"28": ; preds = %"26"
unreachable
"30": ; preds = %"26"
br i1 undef, label %"59", label %"51"
"51": ; preds = %"30"
br i1 undef, label %"55", label %"52"
"52": ; preds = %"51"
unreachable
"55": ; preds = %"51"
%0 = icmp ugt i32 0, undef ; <i1> [#uses=1]
br i1 %0, label %"50.i", label %"9.i"
"9.i": ; preds = %"55"
unreachable
"50.i": ; preds = %"55"
br i1 undef, label %"55.i", label %"54.i"
"54.i": ; preds = %"50.i"
br i1 undef, label %"57.i", label %"55.i"
"55.i": ; preds = %"54.i", %"50.i"
unreachable
"57.i": ; preds = %"54.i"
br label %"63.i"
"61.i": ; preds = %"63.i"
br i1 undef, label %"64.i", label %"62.i"
"62.i": ; preds = %"61.i"
br label %"63.i"
"63.i": ; preds = %"62.i", %"57.i"
br i1 undef, label %"61.i", label %"64.i"
"64.i": ; preds = %"63.i", %"61.i"
unreachable
"59": ; preds = %"30"
br i1 undef, label %"60", label %"82"
"60": ; preds = %"59"
br i1 undef, label %"61", label %"82"
"61": ; preds = %"60"
br i1 undef, label %"62", label %"82"
"62": ; preds = %"61"
br i1 undef, label %"100", label %"63"
"63": ; preds = %"62"
br i1 undef, label %"65", label %"64"
"64": ; preds = %"63"
unreachable
"65": ; preds = %"63"
br i1 undef, label %"66", label %"67"
"66": ; preds = %"65"
unreachable
"67": ; preds = %"65"
%1 = load i32* undef, align 4 ; <i32> [#uses=0]
br label %"100"
"82": ; preds = %"61", %"60", %"59"
unreachable
"93": ; preds = %"19"
%2 = call fastcc %"union tree_node"* @get_computation_at(%"struct loop"* undef, %"struct iv_use"* %use, %"struct iv_cand"* %cand, %"union gimple_statement_d"* %at) nounwind ; <%"union tree_node"*> [#uses=1]
br i1 undef, label %"100", label %"97"
"97": ; preds = %"93"
br i1 undef, label %"99", label %"98"
"98": ; preds = %"97"
br label %"99"
"99": ; preds = %"98", %"97"
%3 = phi %"union tree_node"* [ undef, %"98" ], [ %2, %"97" ] ; <%"union tree_node"*> [#uses=1]
%4 = call fastcc i32 @computation_cost(%"union tree_node"* %3, i8 zeroext undef) nounwind ; <i32> [#uses=1]
br label %"100"
"100": ; preds = %"99", %"93", %"67", %"62", %"25", %"23", %"8", %entry
%memtmp1.1.0 = phi i32 [ 0, %"99" ], [ 10000000, %entry ], [ 10000000, %"8" ], [ 10000000, %"23" ], [ 10000000, %"25" ], [ undef, %"62" ], [ undef, %"67" ], [ 10000000, %"93" ] ; <i32> [#uses=1]
%memtmp1.0.0 = phi i32 [ %4, %"99" ], [ 10000000, %entry ], [ 10000000, %"8" ], [ 10000000, %"23" ], [ 10000000, %"25" ], [ undef, %"62" ], [ undef, %"67" ], [ 10000000, %"93" ] ; <i32> [#uses=1]
%5 = zext i32 %memtmp1.0.0 to i64 ; <i64> [#uses=1]
%6 = zext i32 %memtmp1.1.0 to i64 ; <i64> [#uses=1]
%7 = shl i64 %6, 32 ; <i64> [#uses=1]
%8 = or i64 %7, %5 ; <i64> [#uses=1]
ret i64 %8
}
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