[llvm] r286878 - [X86] Tests exhibiting bad parial reloading behavior. NFC.

[Michael Kuperstein via llvm-commits]

Author: mkuper
Date: Mon Nov 14 13:58:11 2016
New Revision: 286878

URL: http://llvm.org/viewvc/llvm-project?rev=286878&view=rev
Log:
[X86] Tests exhibiting bad parial reloading behavior. NFC.


Added:
    llvm/trunk/test/CodeGen/X86/partial-fold32.ll
    llvm/trunk/test/CodeGen/X86/partial-fold64.ll

Added: llvm/trunk/test/CodeGen/X86/partial-fold32.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/partial-fold32.ll?rev=286878&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/partial-fold32.ll (added)
+++ llvm/trunk/test/CodeGen/X86/partial-fold32.ll Mon Nov 14 13:58:11 2016
@@ -0,0 +1,26 @@
+; RUN: llc -mtriple=i686-unknown-linux-gnu -enable-misched=false < %s | FileCheck %s
+
+define fastcc i8 @fold32to8(i32 %add, i8 %spill) {
+; CHECK-LABEL: fold32to8:
+; CHECK:    movl %ecx, (%esp) # 4-byte Spill
+; CHECK:    movl (%esp), %eax # 4-byte Reload
+; CHECK:    subb %al, %dl
+entry:
+  tail call void asm sideeffect "", "~{eax},~{ebx},~{ecx},~{edi},~{esi},~{ebp},~{dirflag},~{fpsr},~{flags}"()
+  %trunc = trunc i32 %add to i8
+  %sub = sub i8 %spill, %trunc
+  ret i8 %sub
+}
+
+; Do not fold a 1-byte store into a 4-byte spill slot
+define fastcc i8 @nofold(i32 %add, i8 %spill) {
+; CHECK-LABEL: nofold:
+; CHECK:    movl %edx, (%esp) # 4-byte Spill
+; CHECK:    movl (%esp), %eax # 4-byte Reload
+; CHECK:    subb %cl, %al
+entry:
+  tail call void asm sideeffect "", "~{eax},~{ebx},~{edx},~{edi},~{esi},~{ebp},~{dirflag},~{fpsr},~{flags}"()
+  %trunc = trunc i32 %add to i8
+  %sub = sub i8 %spill, %trunc
+  ret i8 %sub
+}

Added: llvm/trunk/test/CodeGen/X86/partial-fold64.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/partial-fold64.ll?rev=286878&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/partial-fold64.ll (added)
+++ llvm/trunk/test/CodeGen/X86/partial-fold64.ll Mon Nov 14 13:58:11 2016
@@ -0,0 +1,43 @@
+; RUN: llc -mtriple=x86_64-unknown-linux-gnu -enable-misched=false < %s | FileCheck %s
+
+define i32 @fold64to32(i64 %add, i32 %spill) {
+; CHECK-LABEL: fold64to32:
+; CHECK:    movq %rdi, -{{[0-9]+}}(%rsp) # 8-byte Spill
+; CHECK:    movq -{{[0-9]+}}(%rsp), %rax # 8-byte Reload
+; CHECK:    subl %eax, %esi
+entry:
+  tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"()
+  %trunc = trunc i64 %add to i32
+  %sub = sub i32 %spill, %trunc
+  ret i32 %sub
+}
+
+define i8 @fold64to8(i64 %add, i8 %spill) {
+; CHECK-LABEL: fold64to8:
+; CHECK:    movq %rdi, -{{[0-9]+}}(%rsp) # 8-byte Spill
+; CHECK:    movq -{{[0-9]+}}(%rsp), %rax # 8-byte Reload
+; CHECK:    subb %al, %sil
+entry:
+  tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"()
+  %trunc = trunc i64 %add to i8
+  %sub = sub i8 %spill, %trunc
+  ret i8 %sub
+}
+
+; Do not fold a 4-byte store into a 8-byte spill slot
+; CHECK-LABEL: nofold
+; CHECK:    movq %rsi, -{{[0-9]+}}(%rsp) # 8-byte Spill
+; CHECK:    movq -{{[0-9]+}}(%rsp), %rax # 8-byte Reload
+; CHECK:    subl %edi, %eax
+; CHECK:    movq %rax, -{{[0-9]+}}(%rsp) # 8-byte Spill
+; CHECK:    movq -{{[0-9]+}}(%rsp), %rax # 8-byte Reload
+define i32 @nofold(i64 %add, i64 %spill) {
+entry:
+  tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"()
+  %trunc = trunc i64 %add to i32
+  %truncspill = trunc i64 %spill to i32
+  %sub = sub i32 %truncspill, %trunc
+  tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"()
+  ret i32 %sub
+}
+