[llvm] 28efe4d - [RISCV] Add tests for merging base offset of BlockAddress

[via llvm-commits]

Author: wangpc
Date: 2023-09-18T11:47:13+08:00
New Revision: 28efe4d38ecefd8f788777348ce56907a5905c47

URL: https://github.com/llvm/llvm-project/commit/28efe4d38ecefd8f788777348ce56907a5905c47
DIFF: https://github.com/llvm/llvm-project/commit/28efe4d38ecefd8f788777348ce56907a5905c47.diff

LOG: [RISCV] Add tests for merging base offset of BlockAddress

We can get `BlockAddress` in user code via `Labels as Values`.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D159428

Added: 
    

Modified: 
    llvm/test/CodeGen/RISCV/fold-addi-loadstore.ll

Removed: 
    


################################################################################
diff  --git a/llvm/test/CodeGen/RISCV/fold-addi-loadstore.ll b/llvm/test/CodeGen/RISCV/fold-addi-loadstore.ll
index f8e1cf5c2ead151..dd64a0f54261557 100644
--- a/llvm/test/CodeGen/RISCV/fold-addi-loadstore.ll
+++ b/llvm/test/CodeGen/RISCV/fold-addi-loadstore.ll
@@ -455,6 +455,95 @@ entry:
   ret i64 %0
 }
 
+; Check for folds in accesses to block address.
+define dso_local ptr @load_ba_1() nounwind {
+; RV32I-LABEL: load_ba_1:
+; RV32I:       # %bb.0: # %entry
+; RV32I-NEXT:  .Ltmp0: # Block address taken
+; RV32I-NEXT:  # %bb.1: # %label
+; RV32I-NEXT:    lui a0, %hi(.Ltmp0)
+; RV32I-NEXT:    lw a0, %lo(.Ltmp0)(a0)
+; RV32I-NEXT:    ret
+;
+; RV32I-MEDIUM-LABEL: load_ba_1:
+; RV32I-MEDIUM:       # %bb.0: # %entry
+; RV32I-MEDIUM-NEXT:  .Ltmp0: # Block address taken
+; RV32I-MEDIUM-NEXT:  # %bb.1: # %label
+; RV32I-MEDIUM-NEXT:  .Lpcrel_hi12:
+; RV32I-MEDIUM-NEXT:    auipc a0, %pcrel_hi(.Ltmp0)
+; RV32I-MEDIUM-NEXT:    addi a0, a0, %pcrel_lo(.Lpcrel_hi12)
+; RV32I-MEDIUM-NEXT:    lw a0, 0(a0)
+; RV32I-MEDIUM-NEXT:    ret
+;
+; RV64I-LABEL: load_ba_1:
+; RV64I:       # %bb.0: # %entry
+; RV64I-NEXT:  .Ltmp0: # Block address taken
+; RV64I-NEXT:  # %bb.1: # %label
+; RV64I-NEXT:    lui a0, %hi(.Ltmp0)
+; RV64I-NEXT:    ld a0, %lo(.Ltmp0)(a0)
+; RV64I-NEXT:    ret
+;
+; RV64I-MEDIUM-LABEL: load_ba_1:
+; RV64I-MEDIUM:       # %bb.0: # %entry
+; RV64I-MEDIUM-NEXT:  .Ltmp0: # Block address taken
+; RV64I-MEDIUM-NEXT:  # %bb.1: # %label
+; RV64I-MEDIUM-NEXT:  .Lpcrel_hi12:
+; RV64I-MEDIUM-NEXT:    auipc a0, %pcrel_hi(.Ltmp0)
+; RV64I-MEDIUM-NEXT:    addi a0, a0, %pcrel_lo(.Lpcrel_hi12)
+; RV64I-MEDIUM-NEXT:    ld a0, 0(a0)
+; RV64I-MEDIUM-NEXT:    ret
+entry:
+  br label %label
+label:
+  %0 = load ptr, ptr blockaddress(@load_ba_1, %label)
+  ret ptr %0
+}
+
+define dso_local ptr @load_ba_2() nounwind {
+; RV32I-LABEL: load_ba_2:
+; RV32I:       # %bb.0: # %entry
+; RV32I-NEXT:  .Ltmp1: # Block address taken
+; RV32I-NEXT:  # %bb.1: # %label
+; RV32I-NEXT:    lui a0, %hi(.Ltmp1)
+; RV32I-NEXT:    addi a0, a0, %lo(.Ltmp1)
+; RV32I-NEXT:    lw a0, 8(a0)
+; RV32I-NEXT:    ret
+;
+; RV32I-MEDIUM-LABEL: load_ba_2:
+; RV32I-MEDIUM:       # %bb.0: # %entry
+; RV32I-MEDIUM-NEXT:  .Ltmp1: # Block address taken
+; RV32I-MEDIUM-NEXT:  # %bb.1: # %label
+; RV32I-MEDIUM-NEXT:  .Lpcrel_hi13:
+; RV32I-MEDIUM-NEXT:    auipc a0, %pcrel_hi(.Ltmp1)
+; RV32I-MEDIUM-NEXT:    addi a0, a0, %pcrel_lo(.Lpcrel_hi13)
+; RV32I-MEDIUM-NEXT:    lw a0, 8(a0)
+; RV32I-MEDIUM-NEXT:    ret
+;
+; RV64I-LABEL: load_ba_2:
+; RV64I:       # %bb.0: # %entry
+; RV64I-NEXT:  .Ltmp1: # Block address taken
+; RV64I-NEXT:  # %bb.1: # %label
+; RV64I-NEXT:    lui a0, %hi(.Ltmp1)
+; RV64I-NEXT:    addi a0, a0, %lo(.Ltmp1)
+; RV64I-NEXT:    ld a0, 8(a0)
+; RV64I-NEXT:    ret
+;
+; RV64I-MEDIUM-LABEL: load_ba_2:
+; RV64I-MEDIUM:       # %bb.0: # %entry
+; RV64I-MEDIUM-NEXT:  .Ltmp1: # Block address taken
+; RV64I-MEDIUM-NEXT:  # %bb.1: # %label
+; RV64I-MEDIUM-NEXT:  .Lpcrel_hi13:
+; RV64I-MEDIUM-NEXT:    auipc a0, %pcrel_hi(.Ltmp1)
+; RV64I-MEDIUM-NEXT:    addi a0, a0, %pcrel_lo(.Lpcrel_hi13)
+; RV64I-MEDIUM-NEXT:    ld a0, 8(a0)
+; RV64I-MEDIUM-NEXT:    ret
+entry:
+  br label %label
+label:
+  %0 = load ptr, ptr getelementptr inbounds (i8, ptr blockaddress(@load_ba_2, %label), i32 8)
+  ret ptr %0
+}
+
 ; Check for folds in accesses to thread-local variables.
 
 @tl_4 = dso_local thread_local global i64 0, align 4