1 ; RUN: llc -O3 < %s | FileCheck %s 2 target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32" 3 target triple = "thumbv7-apple-darwin10" 4 5 ; This test should not produce any spills, even when tail duplication creates lots of phi nodes. 6 ; CHECK-NOT: push 7 ; CHECK-NOT: pop 8 ; CHECK: bx lr 9 10 @codetable.2928 = internal constant [5 x i8*] [i8* blockaddress(@interpret_threaded, %RETURN), i8* blockaddress(@interpret_threaded, %INCREMENT), i8* blockaddress(@interpret_threaded, %DECREMENT), i8* blockaddress(@interpret_threaded, %DOUBLE), i8* blockaddress(@interpret_threaded, %SWAPWORD)] ; <[5 x i8*]*> [#uses=5] 11 @llvm.used = appending global [1 x i8*] [i8* bitcast (i32 (i8*)* @interpret_threaded to i8*)], section "llvm.metadata" ; <[1 x i8*]*> [#uses=0] 12 13 define i32 @interpret_threaded(i8* nocapture %opcodes) nounwind readonly optsize { 14 entry: 15 %0 = load i8* %opcodes, align 1 ; <i8> [#uses=1] 16 %1 = zext i8 %0 to i32 ; <i32> [#uses=1] 17 %2 = getelementptr inbounds [5 x i8*]* @codetable.2928, i32 0, i32 %1 ; <i8**> [#uses=1] 18 br label %bb 19 20 bb: ; preds = %bb.backedge, %entry 21 %indvar = phi i32 [ %phitmp, %bb.backedge ], [ 1, %entry ] ; <i32> [#uses=2] 22 %gotovar.22.0.in = phi i8** [ %gotovar.22.0.in.be, %bb.backedge ], [ %2, %entry ] ; <i8**> [#uses=1] 23 %result.0 = phi i32 [ %result.0.be, %bb.backedge ], [ 0, %entry ] ; <i32> [#uses=6] 24 %opcodes_addr.0 = getelementptr i8* %opcodes, i32 %indvar ; <i8*> [#uses=4] 25 %gotovar.22.0 = load i8** %gotovar.22.0.in, align 4 ; <i8*> [#uses=1] 26 indirectbr i8* %gotovar.22.0, [label %RETURN, label %INCREMENT, label %DECREMENT, label %DOUBLE, label %SWAPWORD] 27 28 RETURN: ; preds = %bb 29 ret i32 %result.0 30 31 INCREMENT: ; preds = %bb 32 %3 = add nsw i32 %result.0, 1 ; <i32> [#uses=1] 33 %4 = load i8* %opcodes_addr.0, align 1 ; <i8> [#uses=1] 34 %5 = zext i8 %4 to i32 ; <i32> [#uses=1] 35 %6 = getelementptr inbounds [5 x i8*]* @codetable.2928, i32 0, i32 %5 ; <i8**> [#uses=1] 36 br label %bb.backedge 37 38 bb.backedge: ; preds = %SWAPWORD, %DOUBLE, %DECREMENT, %INCREMENT 39 %gotovar.22.0.in.be = phi i8** [ %20, %SWAPWORD ], [ %14, %DOUBLE ], [ %10, %DECREMENT ], [ %6, %INCREMENT ] ; <i8**> [#uses=1] 40 %result.0.be = phi i32 [ %17, %SWAPWORD ], [ %11, %DOUBLE ], [ %7, %DECREMENT ], [ %3, %INCREMENT ] ; <i32> [#uses=1] 41 %phitmp = add i32 %indvar, 1 ; <i32> [#uses=1] 42 br label %bb 43 44 DECREMENT: ; preds = %bb 45 %7 = add i32 %result.0, -1 ; <i32> [#uses=1] 46 %8 = load i8* %opcodes_addr.0, align 1 ; <i8> [#uses=1] 47 %9 = zext i8 %8 to i32 ; <i32> [#uses=1] 48 %10 = getelementptr inbounds [5 x i8*]* @codetable.2928, i32 0, i32 %9 ; <i8**> [#uses=1] 49 br label %bb.backedge 50 51 DOUBLE: ; preds = %bb 52 %11 = shl i32 %result.0, 1 ; <i32> [#uses=1] 53 %12 = load i8* %opcodes_addr.0, align 1 ; <i8> [#uses=1] 54 %13 = zext i8 %12 to i32 ; <i32> [#uses=1] 55 %14 = getelementptr inbounds [5 x i8*]* @codetable.2928, i32 0, i32 %13 ; <i8**> [#uses=1] 56 br label %bb.backedge 57 58 SWAPWORD: ; preds = %bb 59 %15 = shl i32 %result.0, 16 ; <i32> [#uses=1] 60 %16 = ashr i32 %result.0, 16 ; <i32> [#uses=1] 61 %17 = or i32 %15, %16 ; <i32> [#uses=1] 62 %18 = load i8* %opcodes_addr.0, align 1 ; <i8> [#uses=1] 63 %19 = zext i8 %18 to i32 ; <i32> [#uses=1] 64 %20 = getelementptr inbounds [5 x i8*]* @codetable.2928, i32 0, i32 %19 ; <i8**> [#uses=1] 65 br label %bb.backedge 66 } 67
