1 ; RUN: llc < %s -mtriple=x86_64-apple-darwin -asm-verbose=false | FileCheck %s -check-prefix=64BIT 2 ; rdar://7329206 3 4 ; In 32-bit the partial register stall would degrade performance. 5 6 define zeroext i16 @t1(i16 zeroext %c, i16 zeroext %k) nounwind ssp { 7 entry: 8 ; 32BIT: t1: 9 ; 32BIT: movw 20(%esp), %ax 10 ; 32BIT-NOT: movw %ax, %cx 11 ; 32BIT: leal 1(%eax), %ecx 12 13 ; 64BIT: t1: 14 ; 64BIT-NOT: movw %si, %ax 15 ; 64BIT: leal 1(%rsi), %eax 16 %0 = icmp eq i16 %k, %c ; <i1> [#uses=1] 17 %1 = add i16 %k, 1 ; <i16> [#uses=3] 18 br i1 %0, label %bb, label %bb1 19 20 bb: ; preds = %entry 21 tail call void @foo(i16 zeroext %1) nounwind 22 ret i16 %1 23 24 bb1: ; preds = %entry 25 ret i16 %1 26 } 27 28 define zeroext i16 @t2(i16 zeroext %c, i16 zeroext %k) nounwind ssp { 29 entry: 30 ; 32BIT: t2: 31 ; 32BIT: movw 20(%esp), %ax 32 ; 32BIT-NOT: movw %ax, %cx 33 ; 32BIT: leal -1(%eax), %ecx 34 35 ; 64BIT: t2: 36 ; 64BIT-NOT: movw %si, %ax 37 ; 64BIT: leal -1(%rsi), %eax 38 %0 = icmp eq i16 %k, %c ; <i1> [#uses=1] 39 %1 = add i16 %k, -1 ; <i16> [#uses=3] 40 br i1 %0, label %bb, label %bb1 41 42 bb: ; preds = %entry 43 tail call void @foo(i16 zeroext %1) nounwind 44 ret i16 %1 45 46 bb1: ; preds = %entry 47 ret i16 %1 48 } 49 50 declare void @foo(i16 zeroext) 51 52 define zeroext i16 @t3(i16 zeroext %c, i16 zeroext %k) nounwind ssp { 53 entry: 54 ; 32BIT: t3: 55 ; 32BIT: movw 20(%esp), %ax 56 ; 32BIT-NOT: movw %ax, %cx 57 ; 32BIT: leal 2(%eax), %ecx 58 59 ; 64BIT: t3: 60 ; 64BIT-NOT: movw %si, %ax 61 ; 64BIT: leal 2(%rsi), %eax 62 %0 = add i16 %k, 2 ; <i16> [#uses=3] 63 %1 = icmp eq i16 %k, %c ; <i1> [#uses=1] 64 br i1 %1, label %bb, label %bb1 65 66 bb: ; preds = %entry 67 tail call void @foo(i16 zeroext %0) nounwind 68 ret i16 %0 69 70 bb1: ; preds = %entry 71 ret i16 %0 72 } 73 74 define zeroext i16 @t4(i16 zeroext %c, i16 zeroext %k) nounwind ssp { 75 entry: 76 ; 32BIT: t4: 77 ; 32BIT: movw 16(%esp), %ax 78 ; 32BIT: movw 20(%esp), %cx 79 ; 32BIT-NOT: movw %cx, %dx 80 ; 32BIT: leal (%ecx,%eax), %edx 81 82 ; 64BIT: t4: 83 ; 64BIT-NOT: movw %si, %ax 84 ; 64BIT: leal (%rsi,%rdi), %eax 85 %0 = add i16 %k, %c ; <i16> [#uses=3] 86 %1 = icmp eq i16 %k, %c ; <i1> [#uses=1] 87 br i1 %1, label %bb, label %bb1 88 89 bb: ; preds = %entry 90 tail call void @foo(i16 zeroext %0) nounwind 91 ret i16 %0 92 93 bb1: ; preds = %entry 94 ret i16 %0 95 } 96
