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Diffstat (limited to 'test/CodeGen/ARM64/extern-weak.ll')
-rw-r--r-- | test/CodeGen/ARM64/extern-weak.ll | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/test/CodeGen/ARM64/extern-weak.ll b/test/CodeGen/ARM64/extern-weak.ll new file mode 100644 index 0000000..a239403 --- /dev/null +++ b/test/CodeGen/ARM64/extern-weak.ll @@ -0,0 +1,51 @@ +; RUN: llc -mtriple=arm64-none-linux-gnu -o - < %s | FileCheck %s +; RUN: llc -mtriple=arm64-none-linux-gnu -code-model=large -o - < %s | FileCheck --check-prefix=CHECK-LARGE %s + +declare extern_weak i32 @var() + +define i32()* @foo() { +; The usual ADRP/ADD pair can't be used for a weak reference because it must +; evaluate to 0 if the symbol is undefined. We use a litpool entry. + ret i32()* @var + +; CHECK: adrp x[[VAR:[0-9]+]], :got:var +; CHECK: ldr x0, [x[[VAR]], :got_lo12:var] + + ; In the large model, the usual relocations are absolute and can + ; materialise 0. +; CHECK-LARGE: movz x0, #:abs_g3:var +; CHECK-LARGE: movk x0, #:abs_g2_nc:var +; CHECK-LARGE: movk x0, #:abs_g1_nc:var +; CHECK-LARGE: movk x0, #:abs_g0_nc:var +} + + +@arr_var = extern_weak global [10 x i32] + +define i32* @bar() { + %addr = getelementptr [10 x i32]* @arr_var, i32 0, i32 5 +; CHECK: adrp x[[ARR_VAR_HI:[0-9]+]], :got:arr_var +; CHECK: ldr [[ARR_VAR:x[0-9]+]], [x[[ARR_VAR_HI]], :got_lo12:arr_var] +; CHECK: add x0, [[ARR_VAR]], #20 + ret i32* %addr + + ; In the large model, the usual relocations are absolute and can + ; materialise 0. +; CHECK-LARGE: movz [[ARR_VAR:x[0-9]+]], #:abs_g3:arr_var +; CHECK-LARGE: movk [[ARR_VAR]], #:abs_g2_nc:arr_var +; CHECK-LARGE: movk [[ARR_VAR]], #:abs_g1_nc:arr_var +; CHECK-LARGE: movk [[ARR_VAR]], #:abs_g0_nc:arr_var +} + +@defined_weak_var = internal unnamed_addr global i32 0 + +define i32* @wibble() { + ret i32* @defined_weak_var +; CHECK: adrp [[BASE:x[0-9]+]], defined_weak_var +; CHECK: add x0, [[BASE]], :lo12:defined_weak_var + +; CHECK-LARGE: movz x0, #:abs_g3:defined_weak_var +; CHECK-LARGE: movk x0, #:abs_g2_nc:defined_weak_var +; CHECK-LARGE: movk x0, #:abs_g1_nc:defined_weak_var +; CHECK-LARGE: movk x0, #:abs_g0_nc:defined_weak_var +} |