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llvm-6502/test/CodeGen/X86/ins_subreg_coalesce-3.ll
Dan Gohman 102f3851bb Eliminate the first have of the optimization which eliminates BRCOND
when the condition is constant. This optimization shouldn't be
necessary, because codegen shouldn't be able to find dead control
paths that the IR-level optimizer can't find. And it's undesirable,
because it encourages bugpoint to leave "br i1 false" branches
in its output. And it wasn't updating the CFG.

I updated all the tests I could, but some tests are too reduced
and I wasn't able to meaningfully preserve them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106748 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24 15:04:11 +00:00

93 lines
4.5 KiB
LLVM

; RUN: llc < %s -march=x86-64 | grep mov | count 3
%struct.COMPOSITE = type { i8, i16, i16 }
%struct.FILE = type { i8*, i32, i32, i16, i16, %struct.__sbuf, i32, i8*, i32 (i8*)*, i32 (i8*, i8*, i32)*, i64 (i8*, i64, i32)*, i32 (i8*, i8*, i32)*, %struct.__sbuf, %struct.__sFILEX*, i32, [3 x i8], [1 x i8], %struct.__sbuf, i32, i64 }
%struct.FILE_POS = type { i8, i8, i16, i32 }
%struct.FIRST_UNION = type { %struct.FILE_POS }
%struct.FONT_INFO = type { %struct.metrics*, i8*, i16*, %struct.COMPOSITE*, i32, %struct.rec*, %struct.rec*, i16, i16, i16*, i8*, i8*, i16* }
%struct.FOURTH_UNION = type { %struct.STYLE }
%struct.GAP = type { i8, i8, i16 }
%struct.LIST = type { %struct.rec*, %struct.rec* }
%struct.SECOND_UNION = type { { i16, i8, i8 } }
%struct.STYLE = type { { %struct.GAP }, { %struct.GAP }, i16, i16, i32 }
%struct.THIRD_UNION = type { %struct.FILE*, [8 x i8] }
%struct.__sFILEX = type opaque
%struct.__sbuf = type { i8*, i32 }
%struct.head_type = type { [2 x %struct.LIST], %struct.FIRST_UNION, %struct.SECOND_UNION, %struct.THIRD_UNION, %struct.FOURTH_UNION, %struct.rec*, { %struct.rec* }, %struct.rec*, %struct.rec*, %struct.rec*, %struct.rec*, %struct.rec*, %struct.rec*, %struct.rec*, %struct.rec*, i32 }
%struct.metrics = type { i16, i16, i16, i16, i16 }
%struct.rec = type { %struct.head_type }
define void @FontChange(i1 %foo) nounwind {
entry:
br i1 %foo, label %bb298, label %bb49
bb49: ; preds = %entry
ret void
bb298: ; preds = %entry
br i1 %foo, label %bb304, label %bb366
bb304: ; preds = %bb298
br i1 %foo, label %bb330, label %bb428
bb330: ; preds = %bb366, %bb304
br label %bb366
bb366: ; preds = %bb330, %bb298
br i1 %foo, label %bb330, label %bb428
bb428: ; preds = %bb366, %bb304
br i1 %foo, label %bb650, label %bb433
bb433: ; preds = %bb428
ret void
bb650: ; preds = %bb650, %bb428
%tmp658 = load i8* null, align 8 ; <i8> [#uses=1]
%tmp659 = icmp eq i8 %tmp658, 0 ; <i1> [#uses=1]
br i1 %tmp659, label %bb650, label %bb662
bb662: ; preds = %bb650
br label %bb761
bb688: ; preds = %bb662
ret void
bb761: ; preds = %bb662
%tmp487248736542 = load i32* null, align 4 ; <i32> [#uses=2]
%tmp487648776541 = and i32 %tmp487248736542, 57344 ; <i32> [#uses=1]
%tmp4881 = icmp eq i32 %tmp487648776541, 8192 ; <i1> [#uses=1]
br i1 %tmp4881, label %bb4884, label %bb4897
bb4884: ; preds = %bb761
%tmp488948906540 = and i32 %tmp487248736542, 7168 ; <i32> [#uses=1]
%tmp4894 = icmp eq i32 %tmp488948906540, 1024 ; <i1> [#uses=1]
br i1 %tmp4894, label %bb4932, label %bb4897
bb4897: ; preds = %bb4884, %bb761
ret void
bb4932: ; preds = %bb4884
%tmp4933 = load i32* null, align 4 ; <i32> [#uses=1]
br i1 %foo, label %bb5054, label %bb4940
bb4940: ; preds = %bb4932
%tmp4943 = load i32* null, align 4 ; <i32> [#uses=2]
switch i32 %tmp4933, label %bb5054 [
i32 159, label %bb4970
i32 160, label %bb5002
]
bb4970: ; preds = %bb4940
%tmp49746536 = trunc i32 %tmp4943 to i16 ; <i16> [#uses=1]
%tmp49764977 = and i16 %tmp49746536, 4095 ; <i16> [#uses=1]
%mask498049814982 = zext i16 %tmp49764977 to i64 ; <i64> [#uses=1]
%tmp4984 = getelementptr %struct.FONT_INFO* null, i64 %mask498049814982, i32 5 ; <%struct.rec**> [#uses=1]
%tmp4985 = load %struct.rec** %tmp4984, align 8 ; <%struct.rec*> [#uses=1]
%tmp4988 = getelementptr %struct.rec* %tmp4985, i64 0, i32 0, i32 3 ; <%struct.THIRD_UNION*> [#uses=1]
%tmp4991 = bitcast %struct.THIRD_UNION* %tmp4988 to i32* ; <i32*> [#uses=1]
%tmp4992 = load i32* %tmp4991, align 8 ; <i32> [#uses=1]
%tmp49924993 = trunc i32 %tmp4992 to i16 ; <i16> [#uses=1]
%tmp4996 = add i16 %tmp49924993, 0 ; <i16> [#uses=1]
br label %bb5054
bb5002: ; preds = %bb4940
%tmp50066537 = trunc i32 %tmp4943 to i16 ; <i16> [#uses=1]
%tmp50085009 = and i16 %tmp50066537, 4095 ; <i16> [#uses=1]
%mask501250135014 = zext i16 %tmp50085009 to i64 ; <i64> [#uses=1]
%tmp5016 = getelementptr %struct.FONT_INFO* null, i64 %mask501250135014, i32 5 ; <%struct.rec**> [#uses=1]
%tmp5017 = load %struct.rec** %tmp5016, align 8 ; <%struct.rec*> [#uses=1]
%tmp5020 = getelementptr %struct.rec* %tmp5017, i64 0, i32 0, i32 3 ; <%struct.THIRD_UNION*> [#uses=1]
%tmp5023 = bitcast %struct.THIRD_UNION* %tmp5020 to i32* ; <i32*> [#uses=1]
%tmp5024 = load i32* %tmp5023, align 8 ; <i32> [#uses=1]
%tmp50245025 = trunc i32 %tmp5024 to i16 ; <i16> [#uses=1]
%tmp5028 = sub i16 %tmp50245025, 0 ; <i16> [#uses=1]
br label %bb5054
bb5054: ; preds = %bb5002, %bb4970, %bb4940, %bb4932
%flen.0.reg2mem.0 = phi i16 [ %tmp4996, %bb4970 ], [ %tmp5028, %bb5002 ], [ 0, %bb4932 ], [ undef, %bb4940 ] ; <i16> [#uses=0]
ret void
}