Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/CodeGen/Thumb/large-stack.ll

@@ -1,117 +0,0 @@
-; RUN: llc < %s -mtriple=thumb-apple-ios | FileCheck %s --check-prefix=CHECK --check-prefix=ALIGN4
-; RUN: llc < %s -mtriple=thumb-none-eabi | FileCheck %s --check-prefix=CHECK --check-prefix=ALIGN8
-; RUN: llc < %s -o %t -filetype=obj -mtriple=thumbv6-apple-ios
-; RUN: llvm-objdump -triple=thumbv6-apple-ios -d %t | FileCheck %s --check-prefix=CHECK --check-prefix=ALIGN4
-; RUN: llc < %s -o %t -filetype=obj -mtriple=thumbv6-none-eabi
-; RUN: llvm-objdump -triple=thumbv6-none-eabi -d %t | FileCheck %s --check-prefix=CHECK --check-prefix=ALIGN8
-
-; Largest stack for which a single tADDspi/tSUBspi is enough
-define void @test1() {
-; CHECK-LABEL: test1:
-; CHECK: sub sp, #508
-; CHECK: add sp, #508
-    %tmp = alloca [ 508 x i8 ] , align 4
-    ret void
-}
-
-; Largest stack for which three tADDspi/tSUBspis are enough
-define void @test100() {
-; CHECK-LABEL: test100:
-; CHECK: sub sp, #508
-; CHECK: sub sp, #508
-; CHECK: sub sp, #508
-; CHECK: add sp, #508
-; CHECK: add sp, #508
-; CHECK: add sp, #508
-    %tmp = alloca [ 1524 x i8 ] , align 4
-    ret void
-}
-
-; Largest stack for which three tADDspi/tSUBspis are enough
-define void @test100_nofpelim() "no-frame-pointer-elim"="true" {
-; CHECK-LABEL: test100_nofpelim:
-; CHECK: sub sp, #508
-; CHECK: sub sp, #508
-; CHECK: sub sp, #508
-; ALIGN4: subs r4, r7, #4
-; ALIGN8: subs r4, r7, #7
-; ALIGN8: subs r4, #1
-; CHECK: mov sp, r4
-    %tmp = alloca [ 1524 x i8 ] , align 4
-    ret void
-}
-
-; Smallest stack for which we use a constant pool
-define void @test2() {
-; CHECK-LABEL: test2:
-; CHECK: ldr [[TEMP:r[0-7]]],
-; CHECK: add sp, [[TEMP]]
-; CHECK: ldr [[TEMP:r[0-7]]],
-; CHECK: add sp, [[TEMP]]
-    %tmp = alloca [ 1528 x i8 ] , align 4
-    ret void
-}
-
-; Smallest stack for which we use a constant pool
-define void @test2_nofpelim() "no-frame-pointer-elim"="true" {
-; CHECK-LABEL: test2_nofpelim:
-; CHECK: ldr [[TEMP:r[0-7]]],
-; CHECK: add sp, [[TEMP]]
-; ALIGN4: subs r4, r7, #4
-; ALIGN8: subs r4, r7, #7
-; ALIGN8: subs r4, #1
-; CHECK: mov sp, r4
-    %tmp = alloca [ 1528 x i8 ] , align 4
-    ret void
-}
-
-define i32 @test3() {
-; CHECK-LABEL: test3:
-; CHECK: ldr [[TEMP:r[0-7]]],
-; CHECK: add sp, [[TEMP]]
-; CHECK: ldr [[TEMP2:r[0-7]]],
-; CHECK: add [[TEMP2]], sp
-; CHECK: ldr [[TEMP3:r[0-7]]],
-; CHECK: add sp, [[TEMP3]]
-    %retval = alloca i32, align 4
-    %tmp = alloca i32, align 4
-    %a = alloca [805306369 x i8], align 4
-    store i32 0, i32* %tmp
-    %tmp1 = load i32, i32* %tmp
-    ret i32 %tmp1
-}
-
-define i32 @test3_nofpelim() "no-frame-pointer-elim"="true" {
-; CHECK-LABEL: test3_nofpelim:
-; CHECK: ldr [[TEMP:r[0-7]]],
-; CHECK: add sp, [[TEMP]]
-; CHECK: ldr [[TEMP2:r[0-7]]],
-; CHECK: add [[TEMP2]], sp
-; CHECK: subs r4, r7,
-; CHECK: mov sp, r4
-    %retval = alloca i32, align 4
-    %tmp = alloca i32, align 4
-    %a = alloca [805306369 x i8], align 8
-    store i32 0, i32* %tmp
-    %tmp1 = load i32, i32* %tmp
-    ret i32 %tmp1
-}
-
-; Here, the adds get optimized out because they are dead, but the calculation
-; of the address of stack_a is dead but not optimized out. When the address
-; calculation gets expanded to two instructions, we need to avoid reading a
-; dead register.
-; No CHECK lines (just test for crashes), as we hope this will be optimised
-; better in future.
-define i32 @test4() {
-entry:
-  %stack_a = alloca i8, align 1
-  %stack_b = alloca [256 x i32*], align 4
-  %int = ptrtoint i8* %stack_a to i32
-  %add = add i32 %int, 1
-  br label %block2
-
-block2:
-  %add2 = add i32 %add, 1
-  ret i32 0
-}