1 ; RUN: llc < %s -march=arm | grep bl.*baz | count 1 2 ; RUN: llc < %s -march=arm | grep bl.*quux | count 1 3 ; RUN: llc < %s -march=arm -enable-tail-merge=0 | grep bl.*baz | count 2 4 ; RUN: llc < %s -march=arm -enable-tail-merge=0 | grep bl.*quux | count 2 5 ; Check that tail merging is the default on ARM, and that -enable-tail-merge=0 works. 6 ; PR1628 7 8 ; ModuleID = 'tail.c' 9 target 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" 10 target triple = "i686-apple-darwin8" 11 12 define i32 @f(i32 %i, i32 %q) { 13 entry: 14 %i_addr = alloca i32 ; <i32*> [#uses=2] 15 %q_addr = alloca i32 ; <i32*> [#uses=2] 16 %retval = alloca i32, align 4 ; <i32*> [#uses=1] 17 store i32 %i, i32* %i_addr 18 store i32 %q, i32* %q_addr 19 %tmp = load i32* %i_addr ; <i32> [#uses=1] 20 %tmp1 = icmp ne i32 %tmp, 0 ; <i1> [#uses=1] 21 %tmp12 = zext i1 %tmp1 to i8 ; <i8> [#uses=1] 22 %toBool = icmp ne i8 %tmp12, 0 ; <i1> [#uses=1] 23 br i1 %toBool, label %cond_true, label %cond_false 24 25 cond_true: ; preds = %entry 26 %tmp3 = call i32 (...)* @bar( ) ; <i32> [#uses=0] 27 %tmp4 = call i32 (...)* @baz( i32 5, i32 6 ) ; <i32> [#uses=0] 28 %tmp7 = load i32* %q_addr ; <i32> [#uses=1] 29 %tmp8 = icmp ne i32 %tmp7, 0 ; <i1> [#uses=1] 30 %tmp89 = zext i1 %tmp8 to i8 ; <i8> [#uses=1] 31 %toBool10 = icmp ne i8 %tmp89, 0 ; <i1> [#uses=1] 32 br i1 %toBool10, label %cond_true11, label %cond_false15 33 34 cond_false: ; preds = %entry 35 %tmp5 = call i32 (...)* @foo( ) ; <i32> [#uses=0] 36 %tmp6 = call i32 (...)* @baz( i32 5, i32 6 ) ; <i32> [#uses=0] 37 %tmp27 = load i32* %q_addr ; <i32> [#uses=1] 38 %tmp28 = icmp ne i32 %tmp27, 0 ; <i1> [#uses=1] 39 %tmp289 = zext i1 %tmp28 to i8 ; <i8> [#uses=1] 40 %toBool210 = icmp ne i8 %tmp289, 0 ; <i1> [#uses=1] 41 br i1 %toBool210, label %cond_true11, label %cond_false15 42 43 cond_true11: ; preds = %cond_next 44 %tmp13 = call i32 (...)* @foo( ) ; <i32> [#uses=0] 45 %tmp14 = call i32 (...)* @quux( i32 3, i32 4 ) ; <i32> [#uses=0] 46 br label %cond_next18 47 48 cond_false15: ; preds = %cond_next 49 %tmp16 = call i32 (...)* @bar( ) ; <i32> [#uses=0] 50 %tmp17 = call i32 (...)* @quux( i32 3, i32 4 ) ; <i32> [#uses=0] 51 br label %cond_next18 52 53 cond_next18: ; preds = %cond_false15, %cond_true11 54 %tmp19 = call i32 (...)* @bar( ) ; <i32> [#uses=0] 55 br label %return 56 57 return: ; preds = %cond_next18 58 %retval20 = load i32* %retval ; <i32> [#uses=1] 59 ret i32 %retval20 60 } 61 62 declare i32 @bar(...) 63 64 declare i32 @baz(...) 65 66 declare i32 @foo(...) 67 68 declare i32 @quux(...) 69
