Address xen0n's comments

Author: heiher

llvm/lib/Target/LoongArch/LoongArchExpandPseudoInsts.cpp

@@ -543,7 +543,7 @@ bool LoongArchPreRAExpandPseudo::expandFunctionCALL(
 
   switch (MF->getTarget().getCodeModel()) {
   default:
-    report_fatal_error("Unsupported code model");
+    report_fatal_error("Unexpected code model");
     break;
   case CodeModel::Small: {
     // CALL:
@@ -756,7 +756,7 @@ bool LoongArchExpandPseudo::expandFunctionCALL(
 
   switch (MF->getTarget().getCodeModel()) {
   default:
-    report_fatal_error("Unsupported code model");
+    report_fatal_error("Unexpected code model");
     break;
   case CodeModel::Medium: {
     // CALL:

llvm/test/CodeGen/LoongArch/expand-adjacency.ll

@@ -0,0 +1,120 @@
+; RUN: llc --mtriple=loongarch64 -mattr=+d --relocation-model=pic \
+; RUN:   --code-model=medium < %s | FileCheck --check-prefix=MEDIUM %s
+; RUN: llc --mtriple=loongarch64 -mattr=+d --relocation-model=pic \
+; RUN:   --code-model=large < %s | FileCheck --check-prefix=LARGE %s
+; RUN: llc --mtriple=loongarch64 -mattr=+d --relocation-model=pic \
+; RUN:   --enable-tlsdesc --code-model=large < %s | \
+; RUN:   FileCheck --check-prefix=LARGEDESC %s
+
+; Check the adjancency of pseudo-instruction expansions to ensure
+; compliance with psABI requirements:
+; https://github.com/loongson/la-abi-specs/releases/tag/v2.30
+
+declare void @llvm.memset.p0.i64(ptr, i8, i64, i1)
+
+define void @call_external_sym(ptr %dst) {
+; LARGE-LABEL: call_external_sym:
+; LARGE:         pcalau12i [[REG1:\$[a-z0-9]+]], %pc_hi20(memset)
+; LARGE-NEXT:    addi.d [[REG2:\$[a-z0-9]+]], $zero, %pc_lo12(memset)
+; LARGE-NEXT:    lu32i.d [[REG2]], %pc64_lo20(memset)
+; LARGE-NEXT:    lu52i.d [[REG2]], [[REG2]], %pc64_hi12(memset)
+entry:
+  call void @llvm.memset.p0.i64(ptr %dst, i8 0, i64 1000, i1 false)
+  ret void
+}
+
+declare i32 @callee_tail(i32 %i)
+
+define i32 @caller_call_tail(i32 %i) nounwind {
+; MEDIUM-LABEL: caller_call_tail:
+; MEDIUM:         pcaddu18i $t8, %call36(callee_tail)
+; MEDIUM-NEXT:    jr $t8
+;
+; LARGE-LABEL: caller_call_tail:
+; LARGE:         pcalau12i [[REG1:\$[a-z0-9]+]], %got_pc_hi20(callee_tail)
+; LARGE-NEXT:    addi.d [[REG2:\$[a-z0-9]+]], $zero, %got_pc_lo12(callee_tail)
+; LARGE-NEXT:    lu32i.d [[REG2]], %got64_pc_lo20(callee_tail)
+; LARGE-NEXT:    lu52i.d [[REG2]], [[REG2]], %got64_pc_hi12(callee_tail)
+entry:
+  call i32 @callee_tail(i32 %i)
+  %r = tail call i32 @callee_tail(i32 %i)
+  ret i32 %r
+}
+
+@ie = external thread_local(initialexec) global i32
+
+define void @test_la_tls_ie(i32 signext %n) {
+; LARGE-LABEL: test_la_tls_ie:
+; LARGE:         pcalau12i [[REG1:\$[a-z0-9]+]], %ie_pc_hi20(ie)
+; LARGE-NEXT:    addi.d [[REG2:\$[a-z0-9]+]], $zero, %ie_pc_lo12(ie)
+; LARGE-NEXT:    lu32i.d [[REG2]], %ie64_pc_lo20(ie)
+; LARGE-NEXT:    lu52i.d [[REG2]], [[REG2]], %ie64_pc_hi12(ie)
+entry:
+  br label %loop
+
+loop:
+  %i = phi i32 [ %inc, %loop ], [ 0, %entry ]
+  %0 = load volatile i32, ptr @ie, align 4
+  %inc = add nuw nsw i32 %i, 1
+  %cmp = icmp slt i32 %inc, %n
+  br i1 %cmp, label %loop, label %ret
+
+ret:
+  ret void
+}
+
+@ld = external thread_local(localdynamic) global i32
+
+define void @test_la_tls_ld(i32 signext %n) {
+; LARGE-LABEL: test_la_tls_ld:
+; LARGE:         pcalau12i [[REG1:\$[a-z0-9]+]], %ld_pc_hi20(ld)
+; LARGE-NEXT:    addi.d [[REG2:\$[a-z0-9]+]], $zero, %got_pc_lo12(ld)
+; LARGE-NEXT:    lu32i.d [[REG2]], %got64_pc_lo20(ld)
+; LARGE-NEXT:    lu52i.d [[REG2]], [[REG2]], %got64_pc_hi12(ld)
+entry:
+  br label %loop
+
+loop:
+  %i = phi i32 [ %inc, %loop ], [ 0, %entry ]
+  %0 = load volatile i32, ptr @ld, align 4
+  %inc = add nuw nsw i32 %i, 1
+  %cmp = icmp slt i32 %inc, %n
+  br i1 %cmp, label %loop, label %ret
+
+ret:
+  ret void
+}
+
+@gd = external thread_local global i32
+
+define void @test_la_tls_gd(i32 signext %n) nounwind {
+; LARGE-LABEL: test_la_tls_gd:
+; LARGE:         pcalau12i [[REG1:\$[a-z0-9]+]], %gd_pc_hi20(gd)
+; LARGE-NEXT:    addi.d [[REG2:\$[a-z0-9]+]], $zero, %got_pc_lo12(gd)
+; LARGE-NEXT:    lu32i.d [[REG2]], %got64_pc_lo20(gd)
+; LARGE-NEXT:    lu52i.d [[REG2]], [[REG2]], %got64_pc_hi12(gd)
+entry:
+  br label %loop
+
+loop:
+  %i = phi i32 [ %inc, %loop ], [ 0, %entry ]
+  %0 = load volatile i32, ptr @gd, align 4
+  %inc = add nuw nsw i32 %i, 1
+  %cmp = icmp slt i32 %inc, %n
+  br i1 %cmp, label %loop, label %ret
+
+ret:
+  ret void
+}
+
+@unspecified = external thread_local global i32
+
+define ptr @test_la_tls_desc() nounwind {
+; LARGEDESC-LABEL: test_la_tls_desc:
+; LARGEDESC:         pcalau12i [[REG1:\$[a-z0-9]+]], %desc_pc_hi20(unspecified)
+; LARGEDESC-NEXT:    addi.d [[REG2:\$[a-z0-9]+]], $zero, %desc_pc_lo12(unspecified)
+; LARGEDESC-NEXT:    lu32i.d [[REG2]], %desc64_pc_lo20(unspecified)
+; LARGEDESC-NEXT:    lu52i.d [[REG2]], [[REG2]], %desc64_pc_hi12(unspecified)
+entry:
+  ret ptr @unspecified
+}