1; Tests that InstrEmitter::EmitMachineNode correctly sets predecessors and 2; successors. 3 4; RUN: llc -stop-after=finalize-isel -print-after=finalize-isel -mtriple=i686-- < %s 2>&1 | FileCheck %s 5 6; The block containting the INLINEASM_BR should have a fallthrough and its 7; indirect targets as its successors. Fallthrough should have 100% branch weight, 8; while the indirect targets have 0%. 9; CHECK: bb.0 (%ir-block.2): 10; CHECK-NEXT: successors: %bb.1(0x80000000), %bb.4(0x00000000); %bb.1(100.00%), %bb.4(0.00%) 11 12; The fallthrough is a block containing a second INLINEASM_BR. Check it has two successors, 13; and the the probability for fallthrough is 100%. 14; CHECK: bb.1 (%ir-block.4): 15; CHECK-NEXT: predecessors: %bb.0 16; CHECK-NEXT: successors: %bb.3(0x80000000), %bb.2(0x00000000); %bb.3(100.00%), %bb.2(0.00%) 17 18; Check the second INLINEASM_BR target block is preceded by the block with the 19; second INLINEASM_BR. 20; CHECK: bb.2 (%ir-block.7, address-taken): 21; CHECK-NEXT: predecessors: %bb.1 22 23; Check the first INLINEASM_BR target block is predecessed by the block with 24; the first INLINEASM_BR. 25; CHECK: bb.4 (%ir-block.11, address-taken): 26; CHECK-NEXT: predecessors: %bb.0 27 28@.str = private unnamed_addr constant [26 x i8] c"inline asm#1 returned %d\0A\00", align 1 29@.str.2 = private unnamed_addr constant [26 x i8] c"inline asm#2 returned %d\0A\00", align 1 30@str = private unnamed_addr constant [30 x i8] c"inline asm#1 caused exception\00", align 1 31@str.4 = private unnamed_addr constant [30 x i8] c"inline asm#2 caused exception\00", align 1 32 33; Function Attrs: nounwind uwtable 34define dso_local i32 @main(i32 %0, i8** nocapture readnone %1) #0 { 35 %3 = callbr i32 asm "jmp ${1:l}", "=r,X,~{dirflag},~{fpsr},~{flags}"(i8* blockaddress(@main, %11)) #3 36 to label %4 [label %11] 37 384: ; preds = %2 39 %5 = tail call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 %3) 40 %6 = callbr i32 asm "jmp ${1:l}", "=r,X,~{dirflag},~{fpsr},~{flags}"(i8* blockaddress(@main, %7)) #3 41 to label %9 [label %7] 42 437: ; preds = %4 44 %8 = tail call i32 @puts(i8* nonnull dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str.4, i64 0, i64 0)) 45 br label %13 46 479: ; preds = %4 48 %10 = tail call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0), i32 %6) 49 br label %13 50 5111: ; preds = %2 52 %12 = tail call i32 @puts(i8* nonnull dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str, i64 0, i64 0)) 53 br label %13 54 5513: ; preds = %11, %9, %7 56 %14 = phi i32 [ 1, %7 ], [ 0, %9 ], [ 1, %11 ] 57 ret i32 %14 58} 59 60declare dso_local i32 @printf(i8* nocapture readonly, ...) local_unnamed_addr #1 61declare i32 @puts(i8* nocapture readonly) local_unnamed_addr #2 62