diff options
Diffstat (limited to 'llvm/test/CodeGen/X86/shift-amount-mod.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/shift-amount-mod.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/shift-amount-mod.ll b/llvm/test/CodeGen/X86/shift-amount-mod.ll index 70fa32027c7..bccb3607c98 100644 --- a/llvm/test/CodeGen/X86/shift-amount-mod.ll +++ b/llvm/test/CodeGen/X86/shift-amount-mod.ll @@ -1552,3 +1552,25 @@ define i64 @reg64_lshr_by_masked_negated_unfolded_add_b(i64 %val, i64 %a, i64 %b %shifted = lshr i64 %val, %negaaddbitwidthaddb ret i64 %shifted } + +define i16 @sh_trunc_sh(i64 %x) { +; X32-LABEL: sh_trunc_sh: +; X32: # %bb.0: +; X32-NEXT: movl {{[0-9]+}}(%esp), %eax +; X32-NEXT: shrl $4, %eax +; X32-NEXT: andl $15, %eax +; X32-NEXT: # kill: def $ax killed $ax killed $eax +; X32-NEXT: retl +; +; X64-LABEL: sh_trunc_sh: +; X64: # %bb.0: +; X64-NEXT: shrq $24, %rdi +; X64-NEXT: movzwl %di, %eax +; X64-NEXT: shrl $12, %eax +; X64-NEXT: # kill: def $ax killed $ax killed $eax +; X64-NEXT: retq + %s = lshr i64 %x, 24 + %t = trunc i64 %s to i16 + %r = lshr i16 %t, 12 + ret i16 %r +} |
