80 lines
2.7 KiB
LLVM
80 lines
2.7 KiB
LLVM
|
; RUN: llc -verify-machineinstrs -mcpu=pwr7 -code-model=medium <%s | FileCheck %s
|
||
|
|
; RUN: llc -verify-machineinstrs -mcpu=pwr7 -code-model=large <%s | FileCheck -check-prefix=LARGE %s
|
||
|
|
|
||
|
|
; Test correct code generation for medium and large code model
|
||
|
|
; for loading the address of a jump table from the TOC.
|
||
|
|
|
||
|
|
target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
|
||
|
|
target triple = "powerpc64-unknown-linux-gnu"
|
||
|
|
|
||
|
|
define signext i32 @test_jump_table(i32 signext %i) nounwind {
|
||
|
|
entry:
|
||
|
|
%i.addr = alloca i32, align 4
|
||
|
|
store i32 %i, i32* %i.addr, align 4
|
||
|
|
%0 = load i32, i32* %i.addr, align 4
|
||
|
|
switch i32 %0, label %sw.default [
|
||
|
|
i32 3, label %sw.bb
|
||
|
|
i32 4, label %sw.bb1
|
||
|
|
i32 5, label %sw.bb2
|
||
|
|
i32 6, label %sw.bb3
|
||
|
|
]
|
||
|
|
|
||
|
|
sw.default: ; preds = %entry
|
||
|
|
br label %sw.epilog
|
||
|
|
|
||
|
|
sw.bb: ; preds = %entry
|
||
|
|
%1 = load i32, i32* %i.addr, align 4
|
||
|
|
%mul = mul nsw i32 %1, 7
|
||
|
|
store i32 %mul, i32* %i.addr, align 4
|
||
|
|
br label %sw.bb1
|
||
|
|
|
||
|
|
sw.bb1: ; preds = %entry, %sw.bb
|
||
|
|
%2 = load i32, i32* %i.addr, align 4
|
||
|
|
%dec = add nsw i32 %2, -1
|
||
|
|
store i32 %dec, i32* %i.addr, align 4
|
||
|
|
br label %sw.bb2
|
||
|
|
|
||
|
|
sw.bb2: ; preds = %entry, %sw.bb1
|
||
|
|
%3 = load i32, i32* %i.addr, align 4
|
||
|
|
%add = add nsw i32 %3, 3
|
||
|
|
store i32 %add, i32* %i.addr, align 4
|
||
|
|
br label %sw.bb3
|
||
|
|
|
||
|
|
sw.bb3: ; preds = %entry, %sw.bb2
|
||
|
|
%4 = load i32, i32* %i.addr, align 4
|
||
|
|
%shl = shl i32 %4, 1
|
||
|
|
store i32 %shl, i32* %i.addr, align 4
|
||
|
|
br label %sw.epilog
|
||
|
|
|
||
|
|
sw.epilog: ; preds = %sw.bb3, %sw.default
|
||
|
|
%5 = load i32, i32* %i.addr, align 4
|
||
|
|
ret i32 %5
|
||
|
|
}
|
||
|
|
; CHECK-LABEL: test_jump_table:
|
||
|
|
; CHECK-NOT: bl .L0$pb
|
||
|
|
|
||
|
|
; CHECK: addis [[REG1:[0-9]+]], 2, .LC[[TOCNUM:[0-9]+]]@toc@ha
|
||
|
|
; CHECK: ld [[REG2:[0-9]+]], .LC[[TOCNUM]]@toc@l([[REG1]])
|
||
|
|
; CHECK: lwax [[REG3:[0-9]+]], {{[0-9]+}}, [[REG2]]
|
||
|
|
; CHECK-NEXT: add [[REG4:[0-9]+]], [[REG3]], [[REG2]]
|
||
|
|
; CHECK-NEXT: mtctr [[REG4]]
|
||
|
|
; CHECK-NEXT: bctr
|
||
|
|
|
||
|
|
; CHECK-LABEL: .LJTI0_0:
|
||
|
|
; CHECK-NEXT: .long .LBB0_{{[0-9]+}}-.LJTI0_0
|
||
|
|
|
||
|
|
; LARGE-LABEL: test_jump_table:
|
||
|
|
; LARGE: bl .L0$pb
|
||
|
|
; LARGE-NEXT: .L0$pb:
|
||
|
|
; LARGE: mflr [[REGBASE:[0-9]+]]
|
||
|
|
|
||
|
|
; LARGE: addis [[REG1:[0-9]+]], 2, .LC[[TOCNUM:[0-9]+]]@toc@ha
|
||
|
|
; LARGE: ld [[REG2:[0-9]+]], .LC[[TOCNUM]]@toc@l([[REG1]])
|
||
|
|
; LARGE: lwax [[REG3:[0-9]+]], {{[0-9]+}}, [[REG2]]
|
||
|
|
; LARGE-NEXT: add [[REG4:[0-9]+]], [[REG3]], [[REGBASE]]
|
||
|
|
; LARGE-NEXT: mtctr [[REG4]]
|
||
|
|
; LARGE-NEXT: bctr
|
||
|
|
|
||
|
|
; LARGE-LABEL: .LJTI0_0:
|
||
|
|
; LARGE-NEXT: .long .LBB0_{{[0-9]+}}-.L0$pb
|