[X86] Add phony registers for high halves of regs with low halves

Registers E[A-D]X, E[SD]I, E[BS]P, and EIP have 16-bit subregisters
that cover the low halves of these registers. This change adds artificial
subregisters for the high halves in order to differentiate (in terms of
register units) between the 32- and the low 16-bit registers.

This patch contains parts that aim to preserve the calculated register
pressure. This is in order to preserve the current codegen (minimize the
impact of this patch). The approach of having artificial subregisters
could be used to fix PR23423, but the pressure calculation would need
to be changed.

Differential Revision: https://reviews.llvm.org/D43353

llvm-svn: 328016

5 files changed, 5 insertions, 5 deletions

diff --git a/llvm/test/CodeGen/X86/dynamic-regmask.ll b/llvm/test/CodeGen/X86/dynamic-regmask.ll
index 01a87eaa7c2..b84fe816fc7 100644
--- a/llvm/test/CodeGen/X86/dynamic-regmask.ll
+++ b/llvm/test/CodeGen/X86/dynamic-regmask.ll
@@ -11,7 +11,7 @@ define i32 @caller(i32 %a0) nounwind {
   ret i32 %b2
 }
 ; CHECK:    name: caller
-; CHECK:    CALL64pcrel32 @callee, CustomRegMask($bh,$bl,$bp,$bpl,$bx,$ebp,$ebx,$esp,$rbp,$rbx,$rsp,$sp,$spl,$r10,$r11,$r12,$r13,$r14,$r15,$xmm8,$xmm9,$xmm10,$xmm11,$xmm12,$xmm13,$xmm14,$xmm15,$r10b,$r11b,$r12b,$r13b,$r14b,$r15b,$r10d,$r11d,$r12d,$r13d,$r14d,$r15d,$r10w,$r11w,$r12w,$r13w,$r14w,$r15w)
+; CHECK:    CALL64pcrel32 @callee, CustomRegMask($bh,$bl,$bp,$bpl,$bx,$ebp,$ebx,$esp,$hbp,$hbx,$hsp,$rbp,$rbx,$rsp,$sp,$spl,$r10,$r11,$r12,$r13,$r14,$r15,$xmm8,$xmm9,$xmm10,$xmm11,$xmm12,$xmm13,$xmm14,$xmm15,$r10b,$r11b,$r12b,$r13b,$r14b,$r15b,$r10d,$r11d,$r12d,$r13d,$r14d,$r15d,$r10w,$r11w,$r12w,$r13w,$r14w,$r15w), implicit $rsp, implicit $ssp, implicit $eax, implicit $ecx, implicit $edx, implicit $edi, implicit $esi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax
 ; CHECK:    RET 0, $eax
 
 define x86_regcallcc {i32, i32, i32} @test_callee(i32 %a0, i32 %b0, i32 %c0, i32 %d0, i32 %e0) nounwind {
diff --git a/llvm/test/CodeGen/X86/ipra-inline-asm.ll b/llvm/test/CodeGen/X86/ipra-inline-asm.ll
index dc9cbfa1078..4e67a974fe3 100644
--- a/llvm/test/CodeGen/X86/ipra-inline-asm.ll
+++ b/llvm/test/CodeGen/X86/ipra-inline-asm.ll
@@ -11,7 +11,7 @@ define void @bar() #0 {
 }
 
 ; Verifies that inline assembly is correctly handled by giving a list of clobbered registers
-; CHECK: foo Clobbered Registers: $ah $al $ax $ch $cl $cx $di $dil $eax $ecx $edi $rax $rcx $rdi
+; CHECK: foo Clobbered Registers: $ah $al $ax $ch $cl $cx $di $dil $eax $ecx $edi $hax $hcx $hdi $rax $rcx $rdi
 define void @foo() #0 {
   call void asm sideeffect "", "~{eax},~{ecx},~{edi}"() #0
   ret void
diff --git a/llvm/test/CodeGen/X86/ipra-reg-alias.ll b/llvm/test/CodeGen/X86/ipra-reg-alias.ll
index 86bba7c06c3..92bf1d17610 100644
--- a/llvm/test/CodeGen/X86/ipra-reg-alias.ll
+++ b/llvm/test/CodeGen/X86/ipra-reg-alias.ll
@@ -6,7 +6,7 @@ define i8 @main(i8 %X) {
   %inc2 = mul i8 %inc, 5
 ; Here only CL is clobbred so CH should not be clobbred, but CX, ECX and RCX
 ; should be clobbered.
-; CHECK: main Clobbered Registers: $ah $al $ax $cl $cx $eax $ecx $eflags $rax $rcx
+; CHECK: main Clobbered Registers: $ah $al $ax $cl $cx $eax $ecx $eflags $hax $rax $rcx
   ret i8 %inc2
 }
 
diff --git a/llvm/test/CodeGen/X86/ipra-reg-usage.ll b/llvm/test/CodeGen/X86/ipra-reg-usage.ll
index 4930526b8f4..bdda7ba6d8f 100644
--- a/llvm/test/CodeGen/X86/ipra-reg-usage.ll
+++ b/llvm/test/CodeGen/X86/ipra-reg-usage.ll
@@ -3,7 +3,7 @@
 target triple = "x86_64-unknown-unknown"
 declare void @bar1()
 define preserve_allcc void @foo()#0 {
-; CHECK: foo Clobbered Registers: $cs $ds $eflags $eip $eiz $es $fpsw $fs $gs $ip $rip $riz $ss $ssp $bnd0 $bnd1 $bnd2 $bnd3 $cr0 $cr1 $cr2 $cr3 $cr4 $cr5 $cr6 $cr7 $cr8 $cr9 $cr10 $cr11 $cr12 $cr13 $cr14 $cr15 $dr0 $dr1 $dr2 $dr3 $dr4 $dr5 $dr6 $dr7 $dr8 $dr9 $dr10 $dr11 $dr12 $dr13 $dr14 $dr15 $fp0 $fp1 $fp2 $fp3 $fp4 $fp5 $fp6 $fp7 $k0 $k1 $k2 $k3 $k4 $k5 $k6 $k7 $mm0 $mm1 $mm2 $mm3 $mm4 $mm5 $mm6 $mm7 $r11 $st0 $st1 $st2 $st3 $st4 $st5 $st6 $st7 $xmm16 $xmm17 $xmm18 $xmm19 $xmm20 $xmm21 $xmm22 $xmm23 $xmm24 $xmm25 $xmm26 $xmm27 $xmm28 $xmm29 $xmm30 $xmm31 $ymm0 $ymm1 $ymm2 $ymm3 $ymm4 $ymm5 $ymm6 $ymm7 $ymm8 $ymm9 $ymm10 $ymm11 $ymm12 $ymm13 $ymm14 $ymm15 $ymm16 $ymm17 $ymm18 $ymm19 $ymm20 $ymm21 $ymm22 $ymm23 $ymm24 $ymm25 $ymm26 $ymm27 $ymm28 $ymm29 $ymm30 $ymm31 $zmm0 $zmm1 $zmm2 $zmm3 $zmm4 $zmm5 $zmm6 $zmm7 $zmm8 $zmm9 $zmm10 $zmm11 $zmm12 $zmm13 $zmm14 $zmm15 $zmm16 $zmm17 $zmm18 $zmm19 $zmm20 $zmm21 $zmm22 $zmm23 $zmm24 $zmm25 $zmm26 $zmm27 $zmm28 $zmm29 $zmm30 $zmm31 $r11b $r11d $r11w
+; CHECK: foo Clobbered Registers: $cs $ds $eflags $eip $eiz $es $fpsw $fs $gs $hip $ip $rip $riz $ss $ssp $bnd0 $bnd1 $bnd2 $bnd3 $cr0 $cr1 $cr2 $cr3 $cr4 $cr5 $cr6 $cr7 $cr8 $cr9 $cr10 $cr11 $cr12 $cr13 $cr14 $cr15 $dr0 $dr1 $dr2 $dr3 $dr4 $dr5 $dr6 $dr7 $dr8 $dr9 $dr10 $dr11 $dr12 $dr13 $dr14 $dr15 $fp0 $fp1 $fp2 $fp3 $fp4 $fp5 $fp6 $fp7 $k0 $k1 $k2 $k3 $k4 $k5 $k6 $k7 $mm0 $mm1 $mm2 $mm3 $mm4 $mm5 $mm6 $mm7 $r11 $st0 $st1 $st2 $st3 $st4 $st5 $st6 $st7 $xmm16 $xmm17 $xmm18 $xmm19 $xmm20 $xmm21 $xmm22 $xmm23 $xmm24 $xmm25 $xmm26 $xmm27 $xmm28 $xmm29 $xmm30 $xmm31 $ymm0 $ymm1 $ymm2 $ymm3 $ymm4 $ymm5 $ymm6 $ymm7 $ymm8 $ymm9 $ymm10 $ymm11 $ymm12 $ymm13 $ymm14 $ymm15 $ymm16 $ymm17 $ymm18 $ymm19 $ymm20 $ymm21 $ymm22 $ymm23 $ymm24 $ymm25 $ymm26 $ymm27 $ymm28 $ymm29 $ymm30 $ymm31 $zmm0 $zmm1 $zmm2 $zmm3 $zmm4 $zmm5 $zmm6 $zmm7 $zmm8 $zmm9 $zmm10 $zmm11 $zmm12 $zmm13 $zmm14 $zmm15 $zmm16 $zmm17 $zmm18 $zmm19 $zmm20 $zmm21 $zmm22 $zmm23 $zmm24 $zmm25 $zmm26 $zmm27 $zmm28 $zmm29 $zmm30 $zmm31 $r11b $r11d $r11w
   call void @bar1()
   call void @bar2()
   ret void
diff --git a/llvm/test/CodeGen/X86/tail-call-conditional.mir b/llvm/test/CodeGen/X86/tail-call-conditional.mir
index 329c4cb3589..396fbf3bac8 100644
--- a/llvm/test/CodeGen/X86/tail-call-conditional.mir
+++ b/llvm/test/CodeGen/X86/tail-call-conditional.mir
@@ -48,7 +48,7 @@ body:             |
   ; CHECK-NEXT: $rdi = COPY $rsi
   ; CHECK-NEXT: $rsi = COPY $rax
   ; CHECK-NEXT: CMP64ri8 $rax, 9, implicit-def $eflags
-  ; CHECK-NEXT: TCRETURNdi64cc @f1, 0, 3, csr_64, implicit $rsp, implicit $eflags, implicit $ssp, implicit $rsp, implicit $rdi, implicit $rsi, implicit $rax, implicit-def $rax, implicit $sil, implicit-def $sil, implicit $si, implicit-def $si, implicit $esi, implicit-def $esi, implicit $rsi, implicit-def $rsi, implicit $dil, implicit-def $dil, implicit $di, implicit-def $di, implicit $edi, implicit-def $edi, implicit $rdi, implicit-def $rdi, implicit $ah, implicit-def $ah, implicit $al, implicit-def $al, implicit $ax, implicit-def $ax, implicit $eax, implicit-def $eax
+  ; CHECK-NEXT: TCRETURNdi64cc @f1, 0, 3, csr_64, implicit $rsp, implicit $eflags, implicit $ssp, implicit $rsp, implicit $rdi, implicit $rsi, implicit $rax, implicit-def $rax, implicit $hsi, implicit-def $hsi, implicit $sil, implicit-def $sil, implicit $si, implicit-def $si, implicit $esi, implicit-def $esi, implicit $rsi, implicit-def $rsi, implicit $hdi, implicit-def $hdi, implicit $dil, implicit-def $dil, implicit $di, implicit-def $di, implicit $edi, implicit-def $edi, implicit $rdi, implicit-def $rdi, implicit $hax, implicit-def $hax, implicit $ah, implicit-def $ah, implicit $al, implicit-def $al, implicit $ax, implicit-def $ax, implicit $eax, implicit-def $eax
 
   bb.1:
     successors: %bb.2, %bb.3