; RUN: llc < %s -mtriple=thumbv7-apple-darwin -O3 -relocation-model=pic -arm-atomic-cfg-tidy=0 | FileCheck %s
; rdar://8115404
; Tail merging must not split an IT block.
%struct.FILE = type { ptr, i32, i32, i16, i16, %struct.__sbuf, i32, ptr, ptr, ptr, ptr, ptr, %struct.__sbuf, ptr, i32, [3 x i8], [1 x i8], %struct.__sbuf, i32, i64 }
%struct._RuneCharClass = type { [14 x i8], i32 }
%struct._RuneEntry = type { i32, i32, i32, ptr }
%struct._RuneLocale = type { [8 x i8], [32 x i8], ptr, ptr, i32, [256 x i32], [256 x i32], [256 x i32], %struct._RuneRange, %struct._RuneRange, %struct._RuneRange, ptr, i32, i32, ptr }
%struct._RuneRange = type { i32, ptr }
%struct.__sFILEX = type opaque
%struct.__sbuf = type { ptr, i32 }
@finput = external global ptr ; <ptr> [#uses=1]
@_DefaultRuneLocale = external global %struct._RuneLocale ; <ptr> [#uses=0]
@token_buffer = external global [1025 x i8], align 4 ; <ptr> [#uses=1]
@.str73 = external constant [6 x i8], align 4 ; <ptr> [#uses=0]
@.str174 = external constant [5 x i8], align 4 ; <ptr> [#uses=0]
@.str275 = external constant [6 x i8], align 4 ; <ptr> [#uses=0]
@.str376 = external constant [5 x i8], align 4 ; <ptr> [#uses=0]
@.str477 = external constant [6 x i8], align 4 ; <ptr> [#uses=0]
@.str578 = external constant [6 x i8], align 4 ; <ptr> [#uses=0]
@.str679 = external constant [7 x i8], align 4 ; <ptr> [#uses=0]
@.str780 = external constant [6 x i8], align 4 ; <ptr> [#uses=0]
@.str881 = external constant [5 x i8], align 4 ; <ptr> [#uses=0]
@.str982 = external constant [6 x i8], align 4 ; <ptr> [#uses=0]
@.str1083 = external constant [9 x i8], align 4 ; <ptr> [#uses=0]
@.str1184 = external constant [7 x i8], align 4 ; <ptr> [#uses=0]
@.str1285 = external constant [16 x i8], align 4 ; <ptr> [#uses=0]
@.str1386 = external constant [12 x i8], align 4 ; <ptr> [#uses=0]
@.str1487 = external constant [5 x i8], align 4 ; <ptr> [#uses=0]
@llvm.used = external global [1 x ptr] ; <ptr> [#uses=0]
define fastcc i32 @parse_percent_token() nounwind {
entry:
; CHECK: pop
; CHECK: pop
; CHECK: pop
; CHECK: pop
; CHECK: pop
; CHECK: pop
; CHECK: pop
; Do not convert into single stream code. BranchProbability Analysis assumes
; that branches which goes to "ret" instruction have lower probabilities.
switch i32 undef, label %bb7 [
i32 37, label %bb43
i32 48, label %bb5
i32 50, label %bb4
i32 60, label %bb2
i32 61, label %bb6
i32 62, label %bb3
i32 123, label %bb1
]
bb1: ; preds = %entry
ret i32 8
bb2: ; preds = %entry
ret i32 15
bb3: ; preds = %entry
ret i32 16
bb4: ; preds = %entry
ret i32 17
bb5: ; preds = %entry
ret i32 9
bb6: ; preds = %entry
ret i32 18
bb7: ; preds = %entry
br i1 undef, label %bb.i.i, label %bb1.i.i
bb.i.i: ; preds = %bb7
br i1 undef, label %bb43, label %bb12
bb1.i.i: ; preds = %bb7
unreachable
bb9: ; preds = %bb.i.i2
br i1 undef, label %bb10, label %bb11
bb10: ; preds = %bb9
br label %bb11
bb11: ; preds = %bb10, %bb9
%p.0 = phi ptr [ undef, %bb10 ], [ %p.1, %bb9 ] ; <ptr> [#uses=1]
%0 = load ptr, ptr @finput, align 4 ; <ptr> [#uses=1]
%1 = tail call i32 @getc(ptr %0) nounwind ; <i32> [#uses=0]
br label %bb12
bb12: ; preds = %bb11, %bb.i.i
%p.1 = phi ptr [ %p.0, %bb11 ], [ @token_buffer, %bb.i.i ] ; <ptr> [#uses=2]
%2 = icmp ult i32 undef, 128 ; <i1> [#uses=1]
br i1 %2, label %bb.i.i2, label %bb1.i.i3
bb.i.i2: ; preds = %bb12
%3 = load i32, ptr null, align 4 ; <i32> [#uses=1]
%4 = lshr i32 %3, 8 ; <i32> [#uses=1]
%.lobit.i1 = and i32 %4, 1 ; <i32> [#uses=1]
%.not = icmp ne i32 %.lobit.i1, 0 ; <i1> [#uses=1]
%or.cond = or i1 %.not, undef ; <i1> [#uses=1]
br i1 %or.cond, label %bb9, label %bb14
bb1.i.i3: ; preds = %bb12
unreachable
bb14: ; preds = %bb.i.i2
store i8 0, ptr %p.1, align 1
br i1 undef, label %bb43, label %bb15
bb15: ; preds = %bb14
unreachable
bb43: ; preds = %bb14, %bb.i.i, %entry
%.0 = phi i32 [ 7, %entry ], [ 24, %bb.i.i ], [ 9, %bb14 ] ; <i32> [#uses=1]
ret i32 %.0
}
declare i32 @getc(ptr nocapture) nounwind
declare i32 @strcmp(ptr nocapture, ptr nocapture) nounwind readonly
declare i32 @__maskrune(i32, i32)
declare i32 @ungetc(i32, ptr nocapture) nounwind
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