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-LABEL: t1: 9 ; 32BIT: movw 20(%esp), %ax 10 ; 32BIT-NOT: movw %ax, %cx 11 ; 32BIT: leal 1(%eax), %ecx 12 13 ; 64BIT-LABEL: 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-LABEL: t2: 31 ; 32BIT: movw 20(%esp), %ax 32 ; 32BIT-NOT: movw %ax, %cx 33 ; 32BIT: leal -1(%eax), %ecx 34 35 ; 64BIT-LABEL: t2: 36 ; 64BIT-NOT: movw %si, %ax 37 ; 64BIT: leal -1(%rsi), %eax 38 ; 64BIT: movzwl %ax 39 %0 = icmp eq i16 %k, %c ; <i1> [#uses=1] 40 %1 = add i16 %k, -1 ; <i16> [#uses=3] 41 br i1 %0, label %bb, label %bb1 42 43 bb: ; preds = %entry 44 tail call void @foo(i16 zeroext %1) nounwind 45 ret i16 %1 46 47 bb1: ; preds = %entry 48 ret i16 %1 49 } 50 51 declare void @foo(i16 zeroext) 52 53 define zeroext i16 @t3(i16 zeroext %c, i16 zeroext %k) nounwind ssp { 54 entry: 55 ; 32BIT-LABEL: t3: 56 ; 32BIT: movw 20(%esp), %ax 57 ; 32BIT-NOT: movw %ax, %cx 58 ; 32BIT: leal 2(%eax), %ecx 59 60 ; 64BIT-LABEL: t3: 61 ; 64BIT-NOT: movw %si, %ax 62 ; 64BIT: leal 2(%rsi), %eax 63 %0 = add i16 %k, 2 ; <i16> [#uses=3] 64 %1 = icmp eq i16 %k, %c ; <i1> [#uses=1] 65 br i1 %1, label %bb, label %bb1 66 67 bb: ; preds = %entry 68 tail call void @foo(i16 zeroext %0) nounwind 69 ret i16 %0 70 71 bb1: ; preds = %entry 72 ret i16 %0 73 } 74 75 define zeroext i16 @t4(i16 zeroext %c, i16 zeroext %k) nounwind ssp { 76 entry: 77 ; 32BIT-LABEL: t4: 78 ; 32BIT: movw 16(%esp), %ax 79 ; 32BIT: movw 20(%esp), %cx 80 ; 32BIT-NOT: movw %cx, %dx 81 ; 32BIT: leal (%ecx,%eax), %edx 82 83 ; 64BIT-LABEL: t4: 84 ; 64BIT-NOT: movw %si, %ax 85 ; 64BIT: leal (%rsi,%rdi), %eax 86 %0 = add i16 %k, %c ; <i16> [#uses=3] 87 %1 = icmp eq i16 %k, %c ; <i1> [#uses=1] 88 br i1 %1, label %bb, label %bb1 89 90 bb: ; preds = %entry 91 tail call void @foo(i16 zeroext %0) nounwind 92 ret i16 %0 93 94 bb1: ; preds = %entry 95 ret i16 %0 96 } 97
