[llvm] r287110 - [X86] Add integer division test for PR23590
Simon Pilgrim via llvm-commits
llvm-commits at lists.llvm.org
Wed Nov 16 06:54:35 PST 2016
Author: rksimon
Date: Wed Nov 16 08:54:34 2016
New Revision: 287110
URL: http://llvm.org/viewvc/llvm-project?rev=287110&view=rev
Log:
[X86] Add integer division test for PR23590
Shows missed opportunity to recognise reduced integer division result size
Modified:
llvm/trunk/test/CodeGen/X86/divide-by-constant.ll
Modified: llvm/trunk/test/CodeGen/X86/divide-by-constant.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/divide-by-constant.ll?rev=287110&r1=287109&r2=287110&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/divide-by-constant.ll (original)
+++ llvm/trunk/test/CodeGen/X86/divide-by-constant.ll Wed Nov 16 08:54:34 2016
@@ -295,3 +295,44 @@ entry:
%div = udiv i32 %x, 33
ret i32 %div
}
+
+define i64 @PR23590(i64 %x) nounwind {
+; X32-LABEL: PR23590:
+; X32: # BB#0: # %entry
+; X32-NEXT: subl $12, %esp
+; X32-NEXT: pushl $0
+; X32-NEXT: pushl $12345 # imm = 0x3039
+; X32-NEXT: pushl {{[0-9]+}}(%esp)
+; X32-NEXT: pushl {{[0-9]+}}(%esp)
+; X32-NEXT: calll __umoddi3
+; X32-NEXT: addl $16, %esp
+; X32-NEXT: pushl $0
+; X32-NEXT: pushl $7
+; X32-NEXT: pushl %edx
+; X32-NEXT: pushl %eax
+; X32-NEXT: calll __udivdi3
+; X32-NEXT: addl $28, %esp
+; X32-NEXT: retl
+;
+; X64-LABEL: PR23590:
+; X64: # BB#0: # %entry
+; X64-NEXT: movq %rdi, %rcx
+; X64-NEXT: movabsq $6120523590596543007, %rdx # imm = 0x54F077C718E7C21F
+; X64-NEXT: movq %rcx, %rax
+; X64-NEXT: mulq %rdx
+; X64-NEXT: shrq $12, %rdx
+; X64-NEXT: imulq $12345, %rdx, %rax # imm = 0x3039
+; X64-NEXT: subq %rax, %rcx
+; X64-NEXT: movabsq $2635249153387078803, %rdx # imm = 0x2492492492492493
+; X64-NEXT: movq %rcx, %rax
+; X64-NEXT: mulq %rdx
+; X64-NEXT: subq %rdx, %rcx
+; X64-NEXT: shrq %rcx
+; X64-NEXT: leaq (%rcx,%rdx), %rax
+; X64-NEXT: shrq $2, %rax
+; X64-NEXT: retq
+entry:
+ %rem = urem i64 %x, 12345
+ %div = udiv i64 %rem, 7
+ ret i64 %div
+}
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