1; RUN: llc < %s -march=arm | FileCheck %s 2; RUN: llc < %s -march=arm -enable-tail-merge=0 | \ 3; RUN: FileCheck --check-prefix=NOMERGE %s 4 5; Check that tail merging is the default on ARM, and that -enable-tail-merge=0 6; works. 7; PR1628 8 9; CHECK: bl _baz 10; CHECK-NOT: bl _baz 11 12; CHECK: bl _quux 13; CHECK-NOT: bl _quux 14 15; NOMERGE: bl _baz 16; NOMERGE: bl _baz 17 18; NOMERGE: bl _quux 19; NOMERGE: bl _quux 20 21; ModuleID = 'tail.c' 22target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64" 23target triple = "i686-apple-darwin8" 24 25define i32 @f(i32 %i, i32 %q) { 26entry: 27 %i_addr = alloca i32 ; <i32*> [#uses=2] 28 %q_addr = alloca i32 ; <i32*> [#uses=2] 29 %retval = alloca i32, align 4 ; <i32*> [#uses=1] 30 store i32 %i, i32* %i_addr 31 store i32 %q, i32* %q_addr 32 %tmp = load i32, i32* %i_addr ; <i32> [#uses=1] 33 %tmp1 = icmp ne i32 %tmp, 0 ; <i1> [#uses=1] 34 %tmp12 = zext i1 %tmp1 to i8 ; <i8> [#uses=1] 35 %toBool = icmp ne i8 %tmp12, 0 ; <i1> [#uses=1] 36 br i1 %toBool, label %cond_true, label %cond_false 37 38cond_true: ; preds = %entry 39 %tmp3 = call i32 (...) @bar( ) ; <i32> [#uses=0] 40 %tmp4 = call i32 (...) @baz( i32 5, i32 6 ) ; <i32> [#uses=0] 41 %tmp7 = load i32, i32* %q_addr ; <i32> [#uses=1] 42 %tmp8 = icmp ne i32 %tmp7, 0 ; <i1> [#uses=1] 43 %tmp89 = zext i1 %tmp8 to i8 ; <i8> [#uses=1] 44 %toBool10 = icmp ne i8 %tmp89, 0 ; <i1> [#uses=1] 45 br i1 %toBool10, label %cond_true11, label %cond_false15 46 47cond_false: ; preds = %entry 48 %tmp5 = call i32 (...) @foo( ) ; <i32> [#uses=0] 49 %tmp6 = call i32 (...) @baz( i32 5, i32 6 ) ; <i32> [#uses=0] 50 %tmp27 = load i32, i32* %q_addr ; <i32> [#uses=1] 51 %tmp28 = icmp ne i32 %tmp27, 0 ; <i1> [#uses=1] 52 %tmp289 = zext i1 %tmp28 to i8 ; <i8> [#uses=1] 53 %toBool210 = icmp ne i8 %tmp289, 0 ; <i1> [#uses=1] 54 br i1 %toBool210, label %cond_true11, label %cond_false15 55 56cond_true11: ; preds = %cond_next 57 %tmp13 = call i32 (...) @foo( ) ; <i32> [#uses=0] 58 %tmp14 = call i32 (...) @quux( i32 3, i32 4 ) ; <i32> [#uses=0] 59 br label %cond_next18 60 61cond_false15: ; preds = %cond_next 62 %tmp16 = call i32 (...) @bar( ) ; <i32> [#uses=0] 63 %tmp17 = call i32 (...) @quux( i32 3, i32 4 ) ; <i32> [#uses=0] 64 br label %cond_next18 65 66cond_next18: ; preds = %cond_false15, %cond_true11 67 %tmp19 = call i32 (...) @bar( ) ; <i32> [#uses=0] 68 br label %return 69 70return: ; preds = %cond_next18 71 %retval20 = load i32, i32* %retval ; <i32> [#uses=1] 72 ret i32 %retval20 73} 74 75declare i32 @bar(...) 76 77declare i32 @baz(...) 78 79declare i32 @foo(...) 80 81declare i32 @quux(...) 82