mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-23 15:29:51 +00:00
56442dfdcf
This makes the job of the later optzn passes easier, allowing the vast amount of icmp transforms to chew on it. We transform 840 switches in gcc.c, leading to a 16k byte shrink of the resulting binary on i386-linux. The testcase from README.txt now compiles into decl %edi cmpl $3, %edi sbbl %eax, %eax andl $1, %eax ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124724 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
3.4 KiB
LLVM
51 lines
3.4 KiB
LLVM
; RUN: opt < %s -simplifycfg -S | FileCheck %s
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%llvm.dbg.anchor.type = type { i32, i32 }
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%llvm.dbg.compile_unit.type = type { i32, { }*, i32, i8*, i8*, i8*, i1, i1, i8* }
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@llvm.dbg.compile_units = linkonce constant %llvm.dbg.anchor.type { i32 458752, i32 17 }, section "llvm.metadata"
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@.str = internal constant [4 x i8] c"a.c\00", section "llvm.metadata" ; <[4 x i8]*> [#uses=1]
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@.str1 = internal constant [6 x i8] c"/tmp/\00", section "llvm.metadata" ; <[6 x i8]*> [#uses=1]
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@.str2 = internal constant [55 x i8] c"4.2.1 (Based on Apple Inc. build 5636) (LLVM build 00)\00", section "llvm.metadata" ; <[55 x i8]*> [#uses=1]
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@llvm.dbg.compile_unit = internal constant %llvm.dbg.compile_unit.type { i32 458769, { }* bitcast (%llvm.dbg.anchor.type* @llvm.dbg.compile_units to { }*), i32 1, i8* getelementptr ([4 x i8]* @.str, i32 0, i32 0), i8* getelementptr ([6 x i8]* @.str1, i32 0, i32 0), i8* getelementptr ([55 x i8]* @.str2, i32 0, i32 0), i1 true, i1 false, i8* null }, section "llvm.metadata" ; <%llvm.dbg.compile_unit.type*> [#uses=1]
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declare void @llvm.dbg.stoppoint(i32, i32, { }*) nounwind
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define i1 @t({ i32, i32 }* %I) {
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; CHECK: @t
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; CHECK: %off = add i32 %tmp.2.i, -14
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; CHECK: %switch = icmp ult i32 %off, 6
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entry:
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%tmp.1.i = getelementptr { i32, i32 }* %I, i64 0, i32 1 ; <i32*> [#uses=1]
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%tmp.2.i = load i32* %tmp.1.i ; <i32> [#uses=6]
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%tmp.2 = icmp eq i32 %tmp.2.i, 14 ; <i1> [#uses=1]
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br i1 %tmp.2, label %shortcirc_done.4, label %shortcirc_next.0
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shortcirc_next.0: ; preds = %entry
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.6 = icmp eq i32 %tmp.2.i, 15 ; <i1> [#uses=1]
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br i1 %tmp.6, label %shortcirc_done.4, label %shortcirc_next.1
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shortcirc_next.1: ; preds = %shortcirc_next.0
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.11 = icmp eq i32 %tmp.2.i, 16 ; <i1> [#uses=1]
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br i1 %tmp.11, label %shortcirc_done.4, label %shortcirc_next.2
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shortcirc_next.2: ; preds = %shortcirc_next.1
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.16 = icmp eq i32 %tmp.2.i, 17 ; <i1> [#uses=1]
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br i1 %tmp.16, label %shortcirc_done.4, label %shortcirc_next.3
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shortcirc_next.3: ; preds = %shortcirc_next.2
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.21 = icmp eq i32 %tmp.2.i, 18 ; <i1> [#uses=1]
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br i1 %tmp.21, label %shortcirc_done.4, label %shortcirc_next.4
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shortcirc_next.4: ; preds = %shortcirc_next.3
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.26 = icmp eq i32 %tmp.2.i, 19 ; <i1> [#uses=1]
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br label %UnifiedReturnBlock
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shortcirc_done.4: ; preds = %shortcirc_next.3, %shortcirc_next.2, %shortcirc_next.1, %shortcirc_next.0, %entry
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br label %UnifiedReturnBlock
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UnifiedReturnBlock: ; preds = %shortcirc_done.4, %shortcirc_next.4
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%UnifiedRetVal = phi i1 [ %tmp.26, %shortcirc_next.4 ], [ true, %shortcirc_done.4 ] ; <i1> [#uses=1]
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ret i1 %UnifiedRetVal
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}
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