1 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse2 -fast-isel -fast-isel-abort=1 | FileCheck %s --check-prefix=ALL --check-prefix=SSE 2 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx -fast-isel -fast-isel-abort=1 | FileCheck %s --check-prefix=ALL --check-prefix=AVX 3 ; 4 ; Verify that fast-isel doesn't select legacy SSE instructions on targets that 5 ; feature AVX. 6 ; 7 ; Test cases are obtained from the following code snippet: 8 ; /// 9 ; double single_to_double_rr(float x) { 10 ; return (double)x; 11 ; } 12 ; float double_to_single_rr(double x) { 13 ; return (float)x; 14 ; } 15 ; double single_to_double_rm(float *x) { 16 ; return (double)*x; 17 ; } 18 ; float double_to_single_rm(double *x) { 19 ; return (float)*x; 20 ; } 21 ; /// 22 23 define double @single_to_double_rr(float %x) { 24 ; ALL-LABEL: single_to_double_rr: 25 ; SSE-NOT: vcvtss2sd 26 ; AVX: vcvtss2sd %xmm0, %xmm0, %xmm0 27 ; ALL: ret 28 entry: 29 %conv = fpext float %x to double 30 ret double %conv 31 } 32 33 define float @double_to_single_rr(double %x) { 34 ; ALL-LABEL: double_to_single_rr: 35 ; SSE-NOT: vcvtsd2ss 36 ; AVX: vcvtsd2ss %xmm0, %xmm0, %xmm0 37 ; ALL: ret 38 entry: 39 %conv = fptrunc double %x to float 40 ret float %conv 41 } 42 43 define double @single_to_double_rm(float* %x) { 44 ; ALL-LABEL: single_to_double_rm: 45 ; SSE: cvtss2sd (%rdi), %xmm0 46 ; AVX: vmovss (%rdi), %xmm0 47 ; AVX-NEXT: vcvtss2sd %xmm0, %xmm0, %xmm0 48 ; ALL-NEXT: ret 49 entry: 50 %0 = load float, float* %x, align 4 51 %conv = fpext float %0 to double 52 ret double %conv 53 } 54 55 define float @double_to_single_rm(double* %x) { 56 ; ALL-LABEL: double_to_single_rm: 57 ; SSE: cvtsd2ss (%rdi), %xmm0 58 ; AVX: vmovsd (%rdi), %xmm0 59 ; AVX-NEXT: vcvtsd2ss %xmm0, %xmm0, %xmm0 60 ; ALL-NEXT: ret 61 entry: 62 %0 = load double, double* %x, align 8 63 %conv = fptrunc double %0 to float 64 ret float %conv 65 } 66
